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Portoroz/Ljubljana Grandmaster Chess Tournament 1975

Portoroz/Ljubljana Grandm aster Chess Tournament 1 9 7 5

by VLASTIMIL HORT

with additional annotations by BARLE, FURMAN, GLIGOR1C. JANOSHVIC, KARPOV, LJUBO.IKVIC, MARIOTTI, MUS1L, PARMA, PORT1SCH, RIBL1, VEL1MIROVIC, VIDMAR and VUKOVIC.

SIDNEY FRIED. Publisher DAVID LEVY & KEVIN O'CONNELL. Editors

RHM PRESS a division of RHM Associates of Delaware, 3 nc. 417 Northern Boulevard, GrcaitKck, NY 11021 Copyright © 1977 RHM PRESS a division of RHM Associates of Delaware, Inc. 417 Northern Boulevard, Greatneck. NY 11021

All rights reserved. No portion of this book may be re­ produced in any form, except for brief passages in a re­ view, without the written consent of the publishers.

Library of Congress Catalog Card No. 75-32892

ISBN 0-89058-022-7

Pholoseuing by Quickset 184-186Old Street, I^ndon EC1V9BQ Printed in the United States of America Publisher’s Foreword

Thousands of beautiful chess games are played each year and we feel that they deserve to be published with illuminating analysis by top Grandmasters and Masters so that chess players around the world can improve their perception of favourite openings, middle game and endgame play, and be encouraged to strike out in new directions by insights gained from the study of these line games. Wc have also found that chess players all over the world are more in­ terested in tournament books than many publishers seem to realize. With these points in mind wc commissioned Vlaslimil Hort to write a tournament book for us on one of the strongest and most memorable events of 1975: the first appear­ ance of the world champion in the Yugoslav towns of Ljubljana and Porloroz. What Hort. ably abetted by the other players, has written will be one of the greatest tournament books of all time. Not only is there penetrating analysis of the most interesting games. Hort has also written something about every game, giving the reader an insight to the international tournament arena and helping him to understand what makes a chess master tick. Our list of outstanding chess books is expanding so fast that we fed sure you. the reader, will want to be on our mailing list to receive news of our future books as they come off the press. In particular, we wish to draw your attention to the description of the RHM Survey of Current Chess Openings which appears at the end of this book. This new survey will, we feel certain, prove of immeasurable help to all chess players in attaining rapid forward progress in the quality of their play. Wc take this opportunity to thank you for your interest in RHM chess books. Sidney Fried Publisher

For details of future RHM chess books, please send a postcard, with your name and address to: RHM Press, 417 Northern Boulevard. Greatneek, NY 11021, or, in Europe, to P.O. Box 55, London N13 5BE.

v Acknowledgements There are many people whom R.H.M. wish to thank for their help in the preparation of this book. All of the notes (except those to game 73 which appear by permission of The Chess Player) were commissioned especially for this book. The notes by Karpov and Furman were translated by Bernard Caffcrty, those by Ribli were translated by Katya Young, those by Velimirovic and the article on Vidmar were translated by Alan Ferguson. The bulk of the photographs were taken by David Levy, the exceptions being those on pages x and 3 (provided by Freddy Reilly) and that on page 95 (supplied by the tournament's organizing committee). The major part of the book was typed by Margaret Fitzjnmes. The final type­ script was edited by Kevin O’Connell who also compiled the indexes and cross­ tables and checked the proofs with additional help Irom Len Perry,

V! Symbols ! A good move. !! An excellent, beautiful or hard-to-find move. ? A poor move. ?? A very poor move or a blunder. t? An interesting move, possibly involving some risk. ?! A dubious move.

SPECIAL ANNOUNCEMENT

The reader’s attention is directed ro the back of this book where we describe a new and exciting project — The RHM Survey of Current Chess Openings. - With a world-renowned Editorial Board which includes Anatoly Karpov. Viktor Korchnoy. Boris Spassky. Tigran Petrosian. Svetozar Gligoric. Bent Larsen and other top Grandmasters, we are presenting an important new approach ro the Openings in chess, which we arc sure you will find of great interest. Please refer lo the back of the book for full details.

RHM Press

Table of Contents

I n tr o d u c tio n ...... 1 M ilan V id m a r ...... , ,. . . . 2 F irst V id m a r M e m o ria l 1 9 6 9 ...... 9 Second Vidmar Memorial 1973 ...... 10 P layers in th e O rd e r of th e D r a w ...... 11 T o u rn a m e n t T a b le s ...... 12 Index to Games ...... 14 T h e T o u r n a m e n t...... 15 Index of Annotators...... 191 In d e x of O p e n in g s ...... 193

IX Viastintil Hart

x INTRODUCTION

Portoroz/Ljubljana will have a permanent place in chess history as the first tournament appearance, as world ehamion, of Anatoly Karpov, This tourna­ ment book will also take its place as one of the all-time-greats. The story begins, as is fitting, with a memorial to Milan Vidmar. Vlastimil Hort then steps in as our narrator to guide us through the tournament and to introduce us to the players, their thoughts, their hopes and fears. He describes the events of all fifteen rounds; the first eight in Portoroz and the last seven in Ljubljana. Twelve of the players, including all the top ten, provide further insights into the tournament in the notes to their games. It is inconceivable that anyone will fail to be impressed not only by the world champion’s victory but also by his deep and revealing annotations. Not that the other players' notes are less interesting b ut Karpov’s contribution is the icing cm the cake.

Kevin O’Connell London, Summer 1977

1 MILAN VIDMAR

by Vladimir Vukovic

Vidmar was born in Ljubljana on 22 June .1885 (remembered also as the day of Paul Morphy’s birth) and began to play chess when he was 15. He was a student in Vienna from 1902 and graduated in engineering in 1907. He took his doctorate in 1910 and was on official work in Austria and Hungary until 1919. He was particularly noted in the field of electrical engineering after 1912 when, under the supervision of O. T. Blathy, head of the 'Ganz' factory, he became involved in work on transformers, at that time a secret known to only a small number of specialists. After the founding of the University of Ljubljana in 1919 Vidmar became a lecturer in electrical engineering in his home town and Later an Academician and Hoad of the Institute of Electrical Engineering. Vidmar's career in chess began in 1904 at the International Deutsches Schachbund 'main totirnament', and tic was given the title of ‘master’ at the masters’ tournament in Nuremberg in 1906. while still a student. Vidmar achieved good results at subsequent masters’ tournaments (in Vienna 1907. 3rd-5th; in Karlsbad in the same year, 6th; in Prague 1908, 3rd) but at his first Grandmasters’ tournament in St. Petersburg, 1909. he was less successful; the intensity of his work in engineering apparently delayed the development of his talent. Nevertheless, in 1911. at the Grandmasters’ tournament in San Sebastian he shared 2ud-3rd place with Rubinstein and henceforth the specia list press acknowledged his title as ’Grandmaster'. Further achievements were at Karlsbad in 191 1 (7th) and Mannheim in 1914. a tournament interrupted by the outbreak of war. where he was second to Alekhine. During the war. in 1918. Vidmar won first prize at the lour-cornered Grandmasters' tournament in Berlin, and in the same year was second in Kosice. After the war. Vidmar appeared in London in 1922. where he came third, after Capablanca and Alekhine. Thereafter he ranked as one of the leading candidates for the title of world chess champion. This was confirmed in Hastings. 1925-6. where he shared first prize with Alekhine (8| in 9 games) which provoked the comment that there had been two players and eight "participants" in the tournament. Sernmering in 1926 was nevertheless the peak of his career. Although only third, he was generally considered to have been the moral victor through the quality ol his play and "the size of his points" against the greatest contemporaries. In New York 1927. Vidmar was fourth; there he was virtually ‘tournament director" and made chess history; having defeated Nimzowitsch, he helped Alekhine to second place in a four-cornered “battle of the giants” . Vidmar's subsequent results were London 1927 (4th). Karlsbad 1929 (5th- 7th). then Bled 1931 (4th-7th) and 51iac I932(lst-2nd). On the whole these were not so good as his results had been in the period 1922-7: in his autobiography Vidmar himself ascribes this to a decline in self-confidence, itself the result of a “life crisis” which came upon him in 19.30. Whatever the actual phenomena of a subjectively perceived “life crisis", there were also objective reasons for the decline of the chess powers of a Grandmaster of Vidmar's standing in an age when the old method of perfecting one’s skills in chess was disappearing and the younger generation was turning to chess as a subject to be studied, as a life vocation. Vidmar's amateur status was loo great a handicap and in later tournaments (Ujpest 1934, Nottingham 1936 and Ljubljana 1938) his results were disappointing. There were still some rather good performances by Vidmar in this period, so that in Zagreb 1939, he wort the last championship of the Royal Yugoslav state and did well on first board at the Olympics in Prague 1931 and Warsaw 1935.

Milan Vidmar

3 Vidmar also wrote on chess and was all the more interesting tor excelling as one of the greatest stylists in the Slovene language. His works were for the most part scholarly. In all there are 35 of them, an impressive achievement in its own right. Vidmar's last activities relating ro chess were his organization of the grand Bled Tournament in 1%1 at which he was also judge. He had already suffered from a heart complaint, to which he succumbed on 9th October 1962. An international tournament was held in Ljubljana in 1969 in Vidmar’s memory and another at Ljubljana/Porforoz in 1973.

White: Rubinstein j cautious; after it White has a slight Black: Vidmar i but definite superiority. i Budapest Gambit 6 Q-K2 7 Q-Q5 BxNch Berlin 19 L8 8 PxB Q-R6 9 R-Bl P-B3 Notes by Vukovic 10 Pxp NxP(B3} 11 Q-Q2 P-Q3 1 P-04 N-KB3 12 N-Q4 0 -0 2 P-QB4 P-K4 13 P-K3? 3 PxP N-N5 4 B-B4 A poor move, undoubtedly weaker than 13 P-B3, although that con­ The alternative is 4 P- K4 which is tinuation has not yet been verified in even stronger than the move made games between masters. Conse­ and is also the main reason why the quently this whole variation of the Budapest Gambit passed out of use gambit has passed, undiscussed, into by masters. oblivion. After 13 P-B3. 13...NxN 14 P*N B-B4 would be critical and 4 ... N-QB3 White would have to settle for 15 P- 5 N-KB3 B-NSch K3 and good play, as 15 P-K4 looks 6 N-B3 dangerous on account of the possible 15...BxP 16 P*B NxP 17 Q-K3 Q- Bernstein's move 6 QN-Q2 is more R4ch 18 K-Ql OR-Kl etc.

4 As Black can restore the position, it is of little consequence that he does not immediately play 19.. .P-R4! then 20 P-KR3 P-R5 21 R-Ql N-N4ch 22 PxN B-K5ch 23 K-K3 B-B7ch then 24...Q-KB4 and mate. A second variation is 20 P-N3 N-N4eh 21 PxN (Or 21 R-N2 B-R6ch and 22...N-B6 mate.) 21...B-K5ch 22 K-K3 B-B7ch 23 K-8.3 Q-KB4ch 24 K-N2 B-KSch 25 K-N1 Q-B6 and mate.

20 K-N3 N-K5ch

13 ... NxN! 14 BPxN N-K5 15 Q-B2 Q-R4ch 16 K-K2

The continuation 16 K-Ql B-B4 17 B-Q3 N*Peh 18 QxN BxB, with forces equal, would give Black the chance of exploiting the white king's insecure position.

16 RxB!

Probably realising that 21...P-R4! A well-considered positional ex­ and so on would be the response to 21 change sacrifice. White would im­ K-B3, Rubinstein will not now re­ mediately respond to 16...B-B4 with store the position and plays a move 17 Q-N2 (17...P-KN4 18 B-N3), winch is, of course, just as hopeless. maintain his extra pawn and gradually consolidate his position. 21 ... R-K3 After the sacrifice this is no longer 22 B-K2 R-R3ch possible as the K-file, with a possible 23 B-R5 RxBch attack on the king, has been opened. 24 KxR B-N3d»)l ch

17 PxR B-B4 Forcing mate. 18 Q-N2 R-Kl 19 K-B3 N-Q7ch 25 Resigns

b White: Reti opening a fine diagonal for the QB Black: Vidmar on B1 but is very dangerous. Gilg used it against me in the final round Slav Defence of the Semmcring tournament and suffered a sharp and rapid defeat. As Semmcring 193t> always in such positions, with each player having a knight on Q2, the Notes by Vidmar opposing Q-pawns form a most im­ portant brake. 1 P-Q4 N-KB3 2 N-KB3 P-04 9 KPxP 3 P-B4 P-B3 4 P-K3 P-K3 9 BPxP is stronger, as 1 proved against Gilg. Both players are only apparently placid in (his opening: both use the 9 ... KPxP! variation which was a real weapon in 10 PxP PxP fierce battles at The Semmcring grand 11 N-K4 tournament. White's main idea is to prevent a mobilisation of the black It is understandable why White is O-side as in the later Meran Defence, uneasy about 11 NxP N-K4 12 B-B5 In this variation White refrains from P-B4, as Black would gain a strong making the move B-Q3 until his ON attack for the sacrificed pawn. has protected K4 from 02. At Semmcring in 1926, Alekhine was 11 ... B- K2t sure that this variation of the Slav Defence was best for White, and even Black finally overcomes all the claimed that Black was in a weaker difficulties of this opening with tills posirion. In the meantime it had move: the pawn at Q5 has become been shown in fierce duels, however, practically inviolable (12 NxP? N- (hat Black could defend himself with K4) and is a firm support for the great ease. black camp.

5 QN-Q2 QN-Q2 12 R-Kl P-B4 6 B-Q3 B-Q3 13 B-N5 B-N2 7 0 -0 0 -0 14 N-N3 R-K1 8 P-K4 P-K4 15 N-R4 Q-N3 16 N(R4)-B5 B-KB1 Flaying Alekhine a few days later, 17 Q-Q2 on the fifth move I played ...P-B4 and freed my play in rhis wav- The While gathers his men on the K- move ...P-K.4 has the advantage of side, but does not yet threaten

6 anything. Black could now play 24 ... RxR 17.. .RxRch 18 RxR R-Bl or even 25 Q xR Qxp 17.. .N-K4. In the first case tlie play 26 Q-K7 B-B3 would be much simpler, and in the 27 Q-K8ch K-N2 second complex. Black therefore 28 Q-K7 chooses the variation which seriously weakens the K-side but promises him There is much of interest in Reti’s the chance of controlled moves. On move 26 he lures the black manoeuvring. bishop to the unprotected square QB3 and thereby prevents ...N-Bl on 17 ... P-N3 move 27. He is now' already pre­ 18 N-R6ch B*N paring a response to his opponent’s 19 BxB N-NS defensive manoeuvre ...Q-N3-Q1, 20 P-KR3 N(JN5)-K4 which is of course essential to Black. 21 B-Bl P-B4 28 ... Q-N3 The black Knight, from KB2, can 29 B-Q3 Q-Ql control the weakened black squares 30 B-R6eh on Ihc K-side while tlie second black knight can assist in this — this is the While was prepared for that! The plan Black began to execute with his blow was not so terrible as it seemed, 17th move. White, however, has re­ however, although it happened on tained both bishops and the weak­ the 30th move, approaching time ness of the black squares in Black’s control. For that very reason, with no camp is serious. Black’s only real other option being allowed, it has no consolation is the pawn on Q5. real strength.

22 B-B4 N-B2 30 ... K-NT 23 RxRch RxR 31 Q-K6 24 R-Kl White is sure he is still attacking, Reti is so convinced that the although he is in fact already lost. I weakness of the black squares in his can still vividly remember the late opponent's camp is decisive, that he Reti, who was sitting at the adjoining does not hesitate: the sacrifice of the tabic as I placed my next move in an pawn on QN2 seems minimal com­ envelope. He was most kind and pared with the pending attack. White almost consoled me. His words had really should be more careful. The the ring of a merciful victor. But I weakness of the black squares cannot realised I was winning. Before I be denied, but the move P-ON3 was stopped my clock I studied the an important one. Now the game be­ various possibilities once more. It comes rather wild. was of little consequence that I had the advantage of the strong QP, 1 saw | 31 ... N-K4! my opponent’s queen endangered. Reti spent his afternoon break in > Defends the bishop and Kl. and happy anticipation. Only when we ' simultaneously attacks the bishop at opened the envelope later and played ; 06 and weaves a net around the my move did his attitude suddenly ! white queen. become sober. Even the greatest masters have their shocks. Only the 32 B-KB1 B-Q2! naive observer who puts his faith 33 Q-Q5 Q-QBl! blindly in late, misleading com­ ! mentaries. thinks that great masters The final move in the combination see all. which began with my 31st move. White finds it impossible to defend himself against.. B-K3. A surprising end to an apparently dangerous attack constructed on the weakness of the black squares in Black's position!

34 Resigns

8 LJUBLJANA GRAN DM ASTER TOURNAMENT 1st Vidmar Memorial, June 2nd-20th. 1969

P G u T B M G p B D p M R B F s w D L Total P l a c e 1 P l a n i n c * 0 1 5 J 1 1 4 1 4 4 i 4 4 1 1 7 7 1 104 1 2 G l i g o r i c 1 •X 5 4 4 4 4 i 1 4 4 4 J l 4 1 5 1 0 0 1 0 2 3 U n z i c k e r 0 * * 4 4 4 4 l 4 4 l l 4 4 l 1 5 9 1 95 3 4 T r i n g o v 4 4 4 * 4 4 4 0 l l 4 4 4 l 4 1 4 1 0 1 9 4 5 R . B y r n e 4 1 4 1 * 4 4 4 4 4 4 4 4 4 l 1 2 1 3 0 84 5-6 6 Matanovic 0 4 4 4 1 * 4 4 l 4 4 l l 4 4 4 3 11 1 84 5-6 7 Gheorghiu 0 4 4 4 4 4 * 0 4 4 r 4 4 4 l 1 3 10 2 8 7-8 8 Puc 1 0 0 1 4 4 l * 4 l fo 4 4 4 4 1 4 8 3 8 7-8 9 Barcza 0 0 1 0 4 0 4 4 X 4 I- l 4 l 1 3 8 4 7 9-11 lODamjanovic 4 } 0 4 4 4 0 4 * 4 '0 4 l 1 4 2 10 3 7 9-11 11 Parma 4 i 0 4 4 4 0 l 4 4 *- 4 4 4 4 4 1 12 2 7 9-11 12 Musil 0 4 0 J 4 0 4 4 4 1 4 * 4 4 4 4 1 11 3 64 12-13 13 Robatsch 4 4 1 4 4 0 4 4 0 4 4 4 * 4 4 4 0 13 2 6J 12-13 14 Bajec 4 0 J 0 4 4 4 4 4 0 4 4 4 X 0 4 0 11 4 5 4 14-15 15 Forintos 0 J 0 4 0 4 0 4 0 0 4 4 4 l • l 2 7 6 54 14-15 16 Stupica 0 0 0 0 0 4 0 0 0 4 4 4 4 4 0 * 0 6 9 3 16 Nate: Tied players are listed in alphabetical order LJUBUANA/PORTOROZ GRANDMASTER TOURNAMENT 2nd Vidntar Memorial, April 3rd-26th, 1973

P G Q s c p s i M p R z R d M B T c 0 p W D L T o t a l1 P l a c e

1 Portisch * 4 4 4 1 4 1 4 4 4 4 4 l 1 1 1 1 1 8 9 0 124 1 2 Gligoric 4 4 4 4 4 0 l 4 4 4 4 4 1 1 1 1 i 6 10 1 11 2-4 3 Quinteros i 4 * 4 4 4 4 4 4 0 4 4 l 1 1 1 1 i 6 10 1 n 2-4 7 4 Smejkal 4 4 4 -* 0 l l 4 4 0 4 4 4 1 1 1 1 l 8 2 li 2-4 5 Csom 0 4 4 l * 4 4 l 0 4 4 4 4 4 1 1 1 l 6 9 2 104 5 6 Parma 4 4 4 0 4 * 4 4 4 4 i 4 4 4 4 4 1 i 3 13 1 94 6-7 7 Suelin 0 l 4 0 4 4 •* 0 4 l 4 i l 4 4 4 4 l 5 9 3 94 6-7 8 Iv kov 4 0 4 4 0 4 1 ■* 4 4 4 4 4 4 4 4 l i 3 12 2 9 8-11 9 Matanovie * X 4 4 4 4 i 4 4 4 4 0 4 c i 4 4 0 i 3 12 2 9 8-11 10 Pianino 4 4 l l 4 4 0 4 4 # 4 4 0 0 4 4 i l 4 10 3 9 8-11 11 Razuvayev 4 i 4 4 4 0 4 4 l 4 > 4 4 4 4 i 4 2 14 1 9 8-11 12 Radulov 2 4 4 4 4 4 4 0 4 4 4 4 ■* 4 0 4 4 i 4 1 14 8 12 13 Minic 0 4 0 4 4 4 0 4 4 l 4 4 # 4 4 4 4 4 1 13 3 74 13 / 14 Bade 0 0 0 0 4 4 4 4 0 1 4 l 4 * 0 i i 0 4 6 7 14 15 Tatai 0 0 0 0 0 4 4 4 4 4 4 4 4 l * 4 0 4 1 10 6 6 15 16 Ciocaltea 0 0 0 0 0 4 4 4 4 4 4 4 4 0 4 X 4 4 0 11 6 54 1 6 17 Osierman 0 0 0 0 0 0 1 0 1 0 0 0 4 0 1 4 ¥ 4 2 4 11 4 17-18 1 4 IS Puc 0 0 0 0 0 0 0 0 0 0 4 4 4 1 4 4 4 X 6 10 17-18

Note.: Tied players are listed in alphabetical order Players in the Order of the Draw

Country Title Age Rating 1 Semyon Furman USSR ’ IGM 54 2560 2 Janez Bade Y ugoslavia YM 23 2330 3 Ljubomir Ljubojevic Yugoslavia IGM 25 2615 4 Anatoly Karpov USSR IGM 24 2705 5 Vlastimil Horl Czechoslovakia IGM 31 2600 6 Vojko Musil Yugoslavia IM 29 2430 7 Dragol.jub Velimirovic Yugoslavia IGM 33 2525 8 Albin Plantnc Yugoslavia IGM 31 2535 9 Sergio Mariotti Italy IGM 28 2495 10 Zoltan Ribli Hungary IGM 23 2520 11 Svetozar Gligorie Yugoslavia IGM 52 2575 12 Marjan Karnar Yugoslavia YCM 30 2200 13 Lajos Portisch Hungary IGM 38 2635 14 Rudolf Osterman Y ugoslavia YM 29 23a') 15 Bruno Parma Yugoslavia TGM 33 2510 16 Silvino Garda Cuba IM 30 2445

Average age of players = 32 Average racing of players = 2498.75 FIDF. Category of tournament = 10 International Grandmaster norm = 9 points International Master norm =7 points

TGM = International Grandmaster IM = International Master YM = Yugoslav Master YCM = Yugoslav Candidate Master

li PORTOROZ/LJUBUANA GRANDMASTER TOURNAMENT June 2nd-21st,. 1975

KA GL F H R PA PO L V R p G MAMUO K w D L Total Place

* X 1 1. 7 8 0 11 1 K a r p o v 2 4 T 2 4 1 4 1 1 4 1 1 I l 4 1 Hr X 1 1 1 X 8 1 10 2 G lig o r ic ■7 T 2 2 2 0 1 2 1 i 1 2 1 4 l 6 1 ]. 1 1 1. 1 * JL 1 1 1 2 5 9 1 9 4 3 - 5 F u r m a n 4 7 1 0 T 1 2 2 1 2 2 i ★ 1 1 1 L 4 l 1 5 9 1 3 - 5 H o r t \ 1 0 4 7 T 2 4 1 1 l 94 .1 L 1. * 1 l 1 R ib li 2 1 T T 7 4 4 1 4 i l i I 4 11 0 94 3 - 5 1. 1 1. 1 _L * 1 1 x 1. 1. X i 1. 1 2 13 0 6 - 7 P a r m a 2 2 1 7 2 2 2 2 i '2 8 4 1 1 * P o r tis c h 0 l "T i 7 2 1 0 l 6 0 i l 4 1 6 5 4 8 4 6 - 7 1 1 1 * t x X 3 10 2 8 8 - 9 L ju b o je v ic 7 0 i- ~T '2 2 0 4- T 1 2 4 l 1 1 i 1. X 1 * 0 6 1 i 0 l 1 5 6 4 8 8-9 Velimirovic 0 1 ■> 2 2 4 1 1. * 1 B a rle 0 0 6 0 Jr 7 0 l i T i l 4 1 5 5 5 7 4 1 0 1 1. * 6 P la n in c 2 0 4 0 6 2 1 4 1 0 0 0 i 4 1 4 5 6 4 11 1 I 1 * 1 5 S. G a r c ia 0 0 4 0 T T 1 0 0 1 i 4 4: 4 2 2 8 6 12-13 1 L 1 1 * 6 M a r i o tt i 0 2 6 2 2 0 0 2 0 0 i 4 4 l 1 3 6 6 1 2 - 1 3 1 i 1 1. l it M u s il 0 0 0 2 0 '2 0 2 1 0 0 7 4 4 1 7 7 4 4 14 1 T * 4 O v e r m a n 0 4 0 0 0 2 4 0 0 •J 4- 0 4 4 0 8 7 15 J ★ Karnar 2 0 4 0 7 0 0 0 0 6 0 i 0 4 4 0 6 9 3 16 Note: Tiedplayers are listed in alphabetical order. PROGRESSIVE POTNT TOTALS

R1 R2 R3 R4 RS R6 R7 R8 R9 RIO R ll R 12 R13 R14 R15 Karpov 1 2 2.V 3 4 41 51 6 7 8 84 94 10 101 11 (iligoric l 14 21 3 3-1 41 54 51 6 64 7 8 9 94 10 Furman J. U 7 21 31 44 5 54 64 64 7 74 8 9 91 Horl 1 n 2b 3 3 4 41 5 6 6? 7 8 8} 9 94 Ribli 4 14 2 71 3 3! 4 5 51 67 7 74 8 81 94 Parma ■y) 1 H 2 24 3 34 44 5 54 64 7 74 8 84 7.1. Poriiseh 0 1 \\ 14 It 3 4 5 5 54 6 64 74 84 Ljubojevic i u 7 21 31 4 41 5 51 6 64 7 7 8 8 Velimirovic 7i i 2 3 4 44 5 5 54 54 6 6 7 7 8 1 74 Barle 12 2 1 H IV 14 2t 31 44 54 6 6 7 7 71 Plam'nc 0 0 0 1 2 24 3 31 4 44 44 54 64 64 7 71 Garcia 4 1 14 2 2 2 ^ 2 21 34 4 44 44 5 6 Marion i 1 14 7 “7 2i 34 31 44 44 44 5 5 51 6 6 1 l 7 7 7.1 Musil 0 '2 ■ > 1 U H 11 3 4 4 44 41 1 1 7 7 1 O s t e r m a n 0 0 0 T 2 1 l 1 >4 3 34 34 4 JL [ lv 2 2 3 Karnar 0 l 4 l 1 14 24 24 24 INDEX OF GAMES (Numbers in Bold Face indicate player on left had White)

CL FU HO RI PA PO LJ VE BA PL GA MA MU OS KA Karpov 109 31 64 100 19 4 48 79 34 83 49 94 66 14 117 Gligoric — 86 116 40 75 58 101 11 92 23 41 26 6 71 56 Furman — — 35 76 120 103 18 52 16 61 1 69 46 106 91 Hort — — — 110 30 13 50 82 47 95 65 99 80 20 5 Ribli — — — 70 55 93 7 85 10 25 24 115 59 42 Parma — — — — — 90 15 45 2 53 105 60 36 104 87 Portisch — .... — ... — — 118 28 107 38 73 43 21 88 72 Ljubojevic — — — — — — — 67 32 78 33 84 63 3 108 Velimirovic — — — — — — — .... 62 112 97 114 96 37 22 Baric — — — — ..- — ..... — — 68 17 77 51 119 102 Planinc — .... — — — — — — - — 113 8 98 44 27 Garcia — — — — — — — .... — — — 9 81 89 57 Mariotti — — ..- — — .... ■ — — — ..... — — 111 54 39 Musii — — — — — — — — — — — — — 29 12 Osterman — — — — — ... — — — — ...._ — — — 74 .... Karnar — — — — — — — — — — — — — ROUND ONE

ROUND ONE

June 2nd

White Black Opening Result Moves 1 Furman Garcia Grunfeld Defence H 41 2 Barle Parma English Opening i-i 16 3 Ljubojevic Ostermart Larsen’s Opening 1-0 52 4 Karpov Portisch Slav Defence 1-0 32 5 Hort Karnar Benoni Defence 1-0 27 6 Musil Gligoric Modern Defence 0-1 34 7 Velimirovic Ribli Sicilian Defence H 17 8 Planinc Mario tti Sicilian Defence 0-1 34

The first half of the tournament was held in Portoroz, a small Istrian spa, but even so, many spectators came to see Karpov as the new World Champion. Karpov's game against Portisch was no disappointment. Porlisch beat Karpov in San Antonio 1972 and another game in Madrid 1973 was a draw-; in Portoroz Karpov’s first move was the psychological surprise 1 N-KB3. Potisch replied with the Slav Defence, which is very difficult to beat, bul Karpov was well prepared theoretically. He hung on to the bishop pair and retained a small advantage until move 27 when Black made the positional mistake 27...R-N1? 27... B*N was necessary with a complicated game, but Portisch had a combination in mind. Everything went wrong for Black, who lost material and resigned some moves later. Barle-Parma, although a short draw, was not without theoretical interest, because Black demonstrated a pawn sacrifice in the classical English Opening. Velimirovic-Ribli was another short draw, but there the picture was different because Velimirovic is a "master of sacrifice” and put his knight on KBS where it can usually be taken in the Sicilian. Compensation for this was nothing more than a draw by repetition. Against Musil. Gligoric had to play very carefully; his queen was in danger of being captured bv the white pieces for a long time but analysis after the game showed that While’s 10 N-QN1?! is too optimistic and Musil lost on time in a bad position. Planinc had won the first Vtdmar Memorial Tournament in 1969 and his intention was, of course, to win the third. He also sacrificed a piece in the Sicilian and later had compensation, but when he played 23 Q-N4?, missing Mariotti's fine defence, 23...Q-B1!, Planinc lost his first point.

15 1’OKTOKOZ/LJUBLJANA 1975

GAME 1 21 B-B3 P-R3 22 R{B1)-N1 R.R2 White: Furman 23 BxN RxB Black: Garcia 24 R-N6 K-Bl 25 P-KR4 P-R4 Grunfeld Defence 26 N-N3 R-QN4 27 N*N RxN 1 P-Q4 N -K B 3 28 P-R4 B-Q4 2 P-Q B 4 P -K N 3 29 BxB RxB 3 N -Q B 3 P -Q 4 30 R

English Opening

1 N-KB3 N-KB3 2 P-KN3 P-B4 3 B-N2 N-B3 4 0 -0 P-KN3 5 P-B4 B-N2 6 P-04 pxp 7 NxP 0 -0 8 N-QB3 P-03 9 NxN PxN 10 Q-K4 B-Q2 11 BxP BxB

16 ROUND ONE

12 QxB Q-Bl 27 K-Bl K-N2 13 N-Q5 NxN 28 N-K3 R-01 14 QxN R-Nl 29 K-K2 P-KR4 15 R-Nl 0-R3 30 N-B4 R-Q4 16 P-QR3 R-N6 31 PxP PxP 17 Drawn 32 R-Q3 B-QS 33 K-B3 R-KB4ch 34 K-K4 B-B6 35 P-0R4 R-B7 GAME 3 36 P-N3 R-B7 37 K-Q5 B-K8 White: Ljubojevic 38 R-K3 B-B7 Black: Osterman 39 R-KB3 P-RS 40 pxp BxP Larsen’s Opening

1 P-0N3 N-KB3 2 B-N2 P-R4 3 P-K3 N-B3 4 P-KB4 P-04 5 N-KB3 P-KN3 6 B-N5 B*Q2 7 N-B3 P-0R3 8 BxN BxB 9 N-K5 R-Bl 10 Q-B3 P-K3 11 0 - 0 B-N2 12 N-K2 0 - 0 13 P-Q3 P-QN4 14 N*B RxN 15 P-K4 PxP 41 N-K5 R-B6 16 PxP 0-N3 42 K-K4 R-B7 17 0R-01 R(B3EB1 43 NQ3 P-R4 18 P-B5 KPxP 44 N-K5 R-B7 19 PxP P-B5dis cb 45 R-Q3 B-K2 20 B-Q4 Q-B3 46 N-B4 K-R3 21 N-B3 QxQ 47 R-Q5 P-N4 22 RxQ PxNP 48 RxRP K-R4 23 QBPxP R(QB1)-01 49 R-R8 B* B3 24 P-KR3 P-N5 50 P-R5 K-R5 25 BxN RxRch 51 P-R6 KXP 26 NxR BxB 52 P-R7 Resigns

17 PORTOROZ/L.IIJBL.IANA 1975

GAME 4 9 ... B-N5 10 P-B3 B-KR4 White: Karpov Black: Portisch White would also have the advantage after 10...N-Q4 11 PXB Slav Defence QxN. Notes by Karpov 11 P-N4 B-N3 1 N-KB3 12 NxB

A move which hxts only recently This is the first time I have had entered my opening repertoire. this position in tournament play. I While does not commit his pawns knew that the exchange of minor and depending on ihe opponent’s pieces is normally deferred, but 1 saw reply can get into it Sicilian, a King’s an interesting concrete plan and was Indian or various Queen's Pawn very attracted by it. openings. 12 ... RPxN 1 ... P-Q4 13 Q-N31? Q-K2 2 P-Q4 N-KB3 3 P-B4 P-B3 4 N-B3 PxP Black would have an unpromising position after 13...P-R4 14 N-R2 N- R3 15 NxB, while after I3...Q-N3 So, a Slav Defence. Its main White has no need to hurry with 14 difference from the Queen’s Gambit is the fact that Black leaves the QB1- N-R2 which is met by 14...B-K2 with KR6 diagonal open for his bishop. equality. The appropriate con­ However 4...B-B4 at once is bad tinuation is rather 14 R-Ql R-Ql because of 5 PxP Pxp ft Q-N3. | 15 P-N5 N-Q4(Or 15...N-R4 16 P-B4 1 with a positional grip.) 16 P-K4. 5 P-QR4 B-B4 6 P-K3 P-K3 14 P-NS 7 Bxp B-QN5 8 0-0 0-0 It was with this in mind that it was 9 N-R4 necessary to exchange on move twelve, since now if 14...KN-Q2 then By the exchange of knight for White has 15 P-B4. bishop White intends to get a slight but persistent advantage. In playing 14 ... N-Q4 the Slav, Black always has to be ; IS P-K4 N-N3 prepared for this. I 16 N-R2!

18 ROUND ONE

It is of prime importance to be sure Why not 21 B-Q3 at once? The of where this bishop will go. point is that it is essential (a) to divert 16...NXB 17 NxB is bad for Black the knight from Q2, so ruling out an • since the massive pawn cenlre immediate . . .N-B4; and (b) once guarantees White the initiative. again to leave the bishop cut off at White can meet I6...B-Q3 by 17 P- QR4, B4 intending P-K5 at the appropriate stage and not letting Black advance 22 ... N-R3 his QBP. Black would lose quickly after 16 ... B-R4 22...N{l)-02 23 P-N4! QxR 24 PxB 17 B-K2 P-K4 N-QB1 25 B-N2 QxN 26 B-B4, but 18 Q-B2! possibly he should try 22...P-QB4 here.

Yet another intermediate move. 23 BxN PxB White would now get the advantage after 18...PxP 19 P-N4 BxP 20 NxB QXN 21 B-R3 Q-R4 22 BxR QxNPch 23 K-Rl KxB 24 P-R5 N(3)-Q2 25 Q- N2N-B4 26QXQP.

18 ... N(3)-Q2 19 PxP QxKP 20 K-Rl R-Kl

Portiseh considered this move to be the cause of his troubles., but 1, on the other hand, consider it a good move. We now get a keen struggle “for and against” the advance of White’s centre pawns. The rook not only attacks the K.P but also, beyond 24 R-Qlt it, the bishop at K2. 3’hc only move, but an excellent 21 B-QB4 one, preparing 25 B-K3 when 25...N- Q4 loses to 26"B-Q4! Intending Q-N3or P-N4. 24 ... P-QB4 21 ... N-N3 25 B-K3 QR-B1 22 B-Q3 26 N-B3

19 PORTOROZ/LJUBLJANA 1975

It was also possible to redeploy the 29 B-B4 knight via QB1. Now Portisch cannot really permit White to achieve his This was the move which Black regrouping, but on the other hand failed to take into account in his has no means of preventing it. calculations. Further play now becomes pointless. 26 ... N-B5 27 B-Bl 29 ... Q-K3 30 R(Q1)-QN1 Q-R6 Quiet, but good. White has an 31 BxR RxR unshakeable grip on Q5, so it is no 32 RxJN) Resigns great concern that the bishop retreats. It will come out again at the right moment. Portisch’s next move is clearly a miscalculation, but even after the better move 27... BxN (27...N-N3 28 N-Q5 has no point for GAME 5 Black.) White has clear winning chances by means of 28 Q*B QxQ 29 White: Hort PxQ followed by 30 B-B4, while it is Black: Karnar also possible to play 28 R-Q5 QxR 29 I . PxQ R-K8ch 30 K-N2 BxP 31 K-B2 I Benoni Defence R-R8 32 QxN BxR 33 B-B4 with a dangerous passed QP. 1 P-QB4 N-KB3 2 N-QB3 P-KN3 3 P-K4 P.Q3 4 P-Q4 B-N2 5 B-K2 0 -0 6 N-B3 P-B4 7 P-Q5 B-N5 8 0 -0 N-R3 9 P-KR3 BxN 10 BxB N-B2 11 B-Q2 P-K3 12 P-QR4 R-Kl 13 Q-N3 PxP 14 KPxP N-Q2 15 QR-K1 P-N3 16 N-K4 N-K4 17 B-Ql P-B4 27 ... R-Nl? 18 B-N5 Q-Q2 28 N-Q5 NxP 19 N-B6ch BxN

20 ROUND ONE

20 BxB Q-B2 7 0-02 21 B-N5 Q-N2 22 B-Q2 Q-B2 23 Q-QB3 P-0R3 7 R-QN1 may be better, and if 24 B-B4 0-N2 7...P-K4 8 BPxP PXP9Q-Q2. 25 P-KN4 Q-B3 26 BxN PxB 7 ... QxNP 27 P-B4 Resigns 8 R-QN1 Q-R6 9 RxP N-Q2

Strangely enough, Black has equalized.

10 N-QN1

10 R-N3 followed by B-K2 is safer. The text move is designed to trap Black’s queen but it only results in the slowing down of White’s develop­ ment.

10 ... QxP 11 Q-B3

Threatening 12B-B4.

11 ... KN-B32 GAM E 6 12 QN-Q2

White: Musll If 12 B-B4 Q-R5 13 R-N4 Q-R4 14 Black: Gligoric R-N8ch RxR 15 QxQ RxNch and Black wins. Modern Defence

Notes by Gligoric 12 ... 0 -0 13 B-B4 Q-R5 1 P-K4 P-Q3 14 0 -0 2 P-Q4 P-KN3 3 N-QB3 B-N2 Now' White threatens 15 R-Rl, 4 P-B4 P-QB3 trapping the queen. 5 N-B3 B-N5 6 B-K3 Q-N3 14 ... QR-N1

21 PORTOROZ/LJUBLJANA 1975

22 N-K5 B-Q4 23 R-B7 R(K1)-QB1 24 RxRch RxR 25 R-R7 P>B3 26 N(K5)-B3 K-B2 27 R-N7 N-R5 28 R-N4 N-B6 29 Nxp R-QR1 30 N-N6 R-R7 31 N-K1 B-K3 32 B-Q2 N-K5ch 33 K-K3 N-Q3 34 P-R3 P-R4 35 White lost on time

15 R-N3 Black still has the better position.

White should have played 15 R*R R xR 6 R-Rl Q-NS 17 QxQ RxQ 18 P-K5 with even chances, but Musil missed the move 18 P-KS. GAME?

15 ... P-Q4! White: Velimirovic 16 R-Rl Black: Ribli

If 16Pxp N*P 17 R-Rl RxR. Sicilian Defence

16 ... N*P 1 P-K4 P-QB4 17 RxQ NxQ 2 N-KB3 P-K3 18 RxN P x b 3 P-Q4 pxp 4 Nxp N-0B3 Black has a clear advantage — he 5 N-QB3 P-QR3 has the bishop pair and an. extra 6 B-KB4 P-Q3 pawn. Also, White was already in 7 N-B3 B-K2 time trouble. 8 0-Q2 Q-B2 9 0 -0 -0 N-K4 19 RxRP N-N3 10 B-N3 N-KB3 20 K-B2 B-K3 11 N-Q4 N-R4 21 R{B3)-R3 KR-K1 12 P-B4 NxB 13 PxN(N3) N-B3 Maybe not the best, but in my 14 P-KN4 B-Q2 haste I did not play very accurately. 15 P-N5 0 -0 -0

22 ROUND ONE

books”, but not really a very good move.

9 P-KR3 QN-Q2 10 P-QR4 P-QN3 11 P-BS P-K4

16 N-B5 PxN 17 N-Q5 Q-Nl 18 Drawn

GAME 8

White: Planinc 12 N-K6! Black: Mariotti The attack initiated by this Sicilian Defence sacrifice is very interesting, and probably sound. Notes by Mariotti 12 ... PxN 1 P-K4 P-QB4 13 PxP Q-B4ch! 2 N-KB3 P-K3 3 P-Q4 PxP Forced, as after 13...N-B4 or 4 Nxp P-QR3 13...N-QN1, White plays 14 N-Q5 5 B-K2 N-KB3 with a winning position. 6 N-QB3 Q-B2 7 0 -0 P-03 14 K-R2 N-QN1 15 RxN! More usual is 7...N-B3 and 8...P- QN4. After 15 N-Q5 BxP 16 NxNeh PxN 17 Rxp K-Q2, Black can defend 8 P-B4 P-KR4?! himself.

To try and “gel out of the 15 ... PxR

23 PORTOROZ/LJUBLJANA 1975

16 BxKRPch K-Ql 23 ... Q-Bl 17 B-B71S 24 BxPch NxB 25 Q-N8 BxN The point of the combination; 26 QtxR K-K21 Black can hardly move a piece, and has no good defence. Blockading the K-side

17 ... R-QR2 27 PxB QxBP 18 Q-B3 RxB 28 R-KBI NxQP 19 P*R N-Q2 29 R-B3 N-B5 20 B*K3 Q-BS 30 Q-N8 P-Q4 21 N-Q5 B-QN2 22 P-QN3 Now Black wins easily; the remaining moves are not important. Interesting is 22 BxPch K-Bl 23 R- R3 BxN 24 R-B3 BxBP 2S RxQcb 31 P-R4 P-Q5 BxR 26 Q-B3 and wins. 32 P-KR5 NxRP 33 R-R3 Q-KB4 22 ... Q-B3 34 Q-R8 Q-B5ch 35 Resigns

23 Q-N4?

23 Q-B5!! threatening 24 Q-K6! and after 23...K-B1 24 NxNPeh K- B2 25 N-Q5ch K-Nl 26 P-B4. White Sergio Mariolti must win. Italyfirst Grandmaster

24 ROUND TWO

ROUNDTWO

June 3rd

White Black Opening Result Moves 9 Garcia (i) Mariotti U) Sicilian Defence H 16 10 Ribli (£) Planinc (0) King’s Indian Def. 1-0 57 11 Gligoric (I) Velimirovic ($) English Opening H 9 12 Kamar (0) Musil (0) English Opening H 40 13 Portisch (0) Hort (1) King's Indian Def. H 33 14 Osterman (0) Karpov (1) Queen's Indian Def. 0-1 46 15 Parma (j) Ljubojevic (1) French Defence H 14 16 Furman (J) Barle <}) Benko Gambit 1-0 44

Karpov's win as Black against Osterman was, of course, a mere formality; he had more than enough compensation for the exchange and it was a pleasure to watch the co-operation of his army. There were several short draws in this round: only Garcia-Mariotti is worth mentioning because the final position seems to be better for White, who could have tried to exploit the weak dark squares on the Q-side. In the game Ribli-Planinc, White systematically outplayed his opponent and after 23 moves was a pawn up. The logical line of the game was broken by time trouble where both players missed good chances. The adjourned position looked good for Ribli who scored the whole point the next day. As Black, Barle tried to surprise Furman with the Benko Gambit, but it was Baric who had to find a good continuation after White's extravagant 9 B-R3!? Black never got full compensation for the pawn and even if the endgame did look hopeful for him Furman’s exact play (26 R-Q4, 27 P-K4! and 28 R-B4) turned the result to White's favour. Barle did not know what to do in order to try and save the half point: it would be interesting to know what the great specialist Benko has to say about this game. In the game Portisch-Hort White had a spatial advantage for a long time, but a draw was agreed as both players were in time trouble and each of them could be proud of advantages that the other lacked. Portisch had two bishops and a majority on the Q-side, Hort a strongly placed bishop on his K5 square and the safer cover for his king. The game should find its place in theoretical sources.

25 PORTOROZ/LJUBLJANA 1975

GAME 9 played P-KN3 against Plannic, but because of incorrect play later F lost White: Garcia the game. Black: Mariotti 5 . . . P-Q3 Sicilian Defence 6 B-K2 P-K4 7 P-Q5 1 P-K4 P-QB4 2 N-KB3 P-K3 This is Petrosian’s pet move: he 3 P-Q4 PxP has achieved quite a number of nice 4 NxP P-QR3 victories with it. 5 B-Q3 Q-B2

6 0 -0 N-QB3 7 ... P-QR4 7 NxN QPxN 8 Q-K2 P-K4 The book recommends here 9 N-Q2 N-B3 7...N(N1)-Q2 8 0 -0 P-B3 9 Q-B2 P- 10 P-QR4 B-QB4 QR4 with drawing chances. 11 N-N3 B-R2 12 P-R5 B-K3 8 0 -0 N-R3 13 B-QB4 BxB 9 B-N5 P-R3 14 QxB 0 -0 -0 10 B-R4 P-B3 15 B-Q2 N-Kl 11 N-Q2 16 0-K2 Drawn If now Black tries the exchange ...PxP then after BPxP this knight is well placed on QB4. GAME 10 11 Q-N3 White: Ribli 12 R-Nl N-R2 Black: Pianino 13 K-Rl P-R4 14 B-K7! R-Kl King’s Indian Defence 15 BxQP PxP!

Notes by Ribli If now 15...P-OB4? then 16 N-N5 B-Q2 17 P-QR3 P-QR5 18 P-B4 P-B3 I P-QB4 P-KN3 19 Q-Kl, and with the IhreaLs of Q- 2 P-Q4 N-KB3 B2, Q-N3, Q-R4 White has an over­ 3 N-QB3 B-N2 whelming advantage. 4 N-B3 0 -0 5 P-K4 16 P-B5! NxP 17 B*N QxB In 1973 at the IBM tournament I 18 NxP

26 ROUND TWO

If 28...RxP then 29 N-Q7 wins.

29 P-B3 B-R3 30 R(QBI)-K1 0-K2 31 N-Q5 Q-R5!

Black has bright ideas in spite of being in time trouble.

32 P-KN3

32...R(Q1)xN 33 PxR RxN was threatened.

The result of the combination is that White has achieved the more favourable position, mainly due to the knight on Q5.

18 ... R-Ql 19 R-Bl Q-Bl 20 N-QB4 N-N4

20...N-B3 would have been better, in order to exchange one of the white knights.

21 N(B4)-N6 R-Nl 22 Q-R4 N-K3 23 QxP N-Q5 24 B-B4 B-K3 25 N-K3?

With this move White gives up his advantage, although up to here he m u held not only an extra pawn, but the initiative as well.

32 , . . Q-R6 25 ... N-B3 33 R-B2 P-R5 26 Q-B3 B*B 34 P-KN4 B-B5 27 NfK3)xB R-QS 35 R-KN1 B-N6 28 P-QR3 R(Nl)-Ql 36 R(B2)-N2?

27 PO RTOROZ/UUBLJ AN A 1975

It would have been better to play QxBPch 44 K-Nl P-R6 45 R-KB2 36 R-B2 and if now 36...RxN(B5), 37 QxNPch 46 K-Rl Q-KSch 47 K-R2 QxR Bx? then 38 Q-81 and White N-B6ch. wins. 43 K-B1 N-Q7ch 36 ... RxN(B5U 44 RxN Q-R8ch 37 QxR BxP! 45 K-K2 BxR 38 R-KB1?I 46 KxB! QxRch

White is not satisfied with 38 RxB Black has the greater number of QxBPch 39 R(N1)-N2 Q-Q8ch 40 R- pawns, but in the ending it is not so Nt Q-B6ch with perpetual check. much the number of one's pawns that counts as their speed, and in this 38 ... B-B5dis ch particular case it is White's which are 39 K-Nl RxN! faster. 40 PxR B-K6ch 41 R(BI)-B2 N-Q5 47 K-B3 Q*N6ch 42 P-Q6 Here the game was adjourned.

48 K-N4 P-K5 49 Q-Q45

If 49 Q-B8ch then 49...K-N2 50 P- Q7 Q-Q3ch 51 K-N5 Q-R3ch 52 K- B5 Q-R4ch 53 K-Q6 Q-N3ch would have given Black more chance of forcing perpetual check,

49 ... Q-K8ch 50 K-R4! P-QN4ch 51 KxP Q-KB8ch 42 ... NxPch? 52 K-N6 Q-KB5 53 K-B6 Q-N4 Black is in a hurry, even after the 54 P-Q7 Q-Qi time-control; but he should not have 55 Q-N6 Q-B3ch overpressed his luck. 42...BxRch! 56 K-.N7 Q-K2 would have won: 43 RxB NxPch 44 57 K-B8 RxN QxR 45 Q-B8ch (or 45 P-Q7 Q- Q8ch) 45...K-N2 46 P-Q7 P-R6 And Black resigns because he can­ 47 Q-B2 QxNPch; or 43 KxB not stop the pawn.

28 ROUND TWO

GAME 11 15 Q-K2 P-QR3 16 KR-Ql P-QN4 White: Gligorie 17 P-BS Q-K3 Black; Velimirovie 18 PxP RxP 19 RxR Q*R English Opening 20 P-B4 P-K4 21 R-Ql 0-K3 1 N-KB3 N-KB3 22 N-Q5 PxP 2 P-B4 P-B4 23 BxN BxB 3 N-B3 N-B3 24 pxp B-N2 4 P-K3 P-KN3 25 0-»3 r -q b i 5 P-Q4 P*P 26 R-Q2 P-QR4 6 PxP P-04 27 P-KR3 N-K2 7 B-K2 B-N2 28 N(B2)-K3 N-B3 8 0 -0 0 -0 29 P-K5 P-R4 9 R-Kl B-K3 30 Q-K4 R-Ql 10 Drawn

GAMF 12

White: Karnar Black: Musi!

English Opening

1 P-0B4 N-KB3 2 N-QB3 P-B4 3 P-KN3 P-KN3 4 B-N2 B-N2 31 R-QB2 N-K2 5 N-B3 N-B3 32 R-02 K-Rl 6 P-04 PXP 33 R-Q3 Q-QB3 7 Nxp 0 -0 34 R-B3 Q-Rl 8 0 -0 P-Q3 35 R-B5 NxN 9 N-B2 B-K3 36 RxN P-N5 10 P-N3 Q-Q2 37 K-N3 K-R2 11 B-N2 B-R6 38 0 -0 3 RxR 12 R-Nl BxB 39 QxR Q-R2 13 KxB KR-01 40 K-B3 0-K2 14 P-K4 QR-N1 41 Drawn

29 PORTOFtOZ/LJUBLJANA 1975

GAME 13 21 N-Q2 N-B5 22 NxN PxN White: Portisch 23 R-N1 Q-Q2 Black: Horl 24 R-B2 R-R2 25 R-B2 R(R2)-B2 King’s Indian Defence 26 R-B3 P-K4 27 PXP BxP 1 P-Q4 N-KB3 28 B-B2 Q-R5 2 P-QB4 P-KN3 29 0 0 2 N-Q2 3 N-KB3 B-N2 30 R(N1)-QB1 N-B3 4 P-KN3 0 -0 31 N-B6 B*N 5 B-N2 P-B3 32 Rxp N-Kl 6 0 -0 P-Q3 33 PxB RxP 7 N-B3 0-R4 34 Drawn 8 P-KR3 B-K3 9 P-Q5 pxp 10 N-Q4 B-Q2 11 N-N3 0-R3 GAME 14 12 PxP R-Bl 13 P-K4 P-0N4 White: Oslerman 14 P-QR3 B-Kl Black: Karpov 15 N-Q4 Q-N2 16 B-K3 P-0R3 Owcen’s Indian Defence 17 P-B4 N{B3)-Q2 18 R-Bl N-B4 I P-Q4 N-KB3 19 P-QN4 N(B4)-Q2 2 P-QB4 P-K3 3 N-KB3 P-QN3 4 P-K3 B-N2 5 N-B3 P-Q4 6 B-Q3 B-K2 7 0 -0 0 -0 8 Q-K2 P-B4 9 PxBP NPxP 10 P-K4 P-Q5 11 N-Nl QN-Q2 12 P-K5 BxN 13 PxB N-Kl 14 B-B4 R-Nl 15 P-N3 P-N3 16 N-02 N-N2 17 K-Rl N-R4 20 N-Nl N-N3 18 B-R6

30 ROUND TWO

45 R-N7 RxP 46 B-Ql R-B8 47 Resigns

GAME 15

White: Parma Blacks ijubojevic

French Defence

1 P-K4 P-K3 2 P-Q4 P-Q4 18 . . . B-N4 3 NQ2 P-QN3 BxR Q*B 19 4 KN-B3 N-KB3 20 R-KN1 B-B5 5 B-03 B-K2 21 N-K4 BxKP 6 0 - 0 PxP 22 N-N3 N-B5 7 NxP B-N2 23 Q-Q2 B-B2 8 Q-K2 0 -0 24 B-Bl Q-Q3 9 R-Ql QN-Q2 25 R-Kl P-B4 10 P-B4 R-Kl 26 B-K2 K-B2 11 B-B4 Q-Bl 27 RN1 P-QR4 12 N-K5 NiB3)xN P-R4 28 P-QR3 13 BxN NxN 29 R(N1J-K1 P-KK5 14 Bx-N Drawn 30 iS-Bl Q-K2 31 N-K3 N-B3 32 B-Ql PxJN pxp 33 R-Ql GAME 16 34 Q-QB2 N-Q6 35 R-KB1 P-K4 White: Furman 36 P-K4 R-Q5 Black: Barle 37 pxp pxp 38 P-N4 RpxP Benko Gambit 39 pxp pxp 40 Q-KN2 P-K5 Notes by Furman 41 pxp Qxp 42 B-B3 0-K4 1 P-Q4 N-KB3 43 R-Rl P-N6 2 P-QB4 P-B4 44 K-R7 P-N7 3 P-05 P-0N4

31 PORTOROZ/LJUBLJANA 1975

4 pxp P-QR3 24 BxN BxN, threatening both 5 PxP BxP ...PxBand ...P-B7. 6 N-QB3 P-03 7 N-B3 P-N3 22 ... KxB 8 P-KN3 B-KN2 23 R|N1)-B1 P-B6 9 B-R3 24 N-Q4 RxRP 25 N-B6 R-N4 The bishop occupies a more active 26 R-Q4 N-B3 square than on KN2. Later on. it 27 P-K4 hinders the typical manoeuvre by Black of ...N*KN5 followed by The ending is clearly in While's ...N-K4. favour . He has m;in aged to safeguard his pawns whereas his opponent is 9 ... 0 -0 saddled with a we::ik QBP. 10 0 -0 QN-Q2 11 Q-B2 Q-B2 27 R-N6 28 R-B4 R-N2 Black could consider the more 29 K-B3 P-B7disch active line 11...Q-R4. 30 K-K2 P-K.3 31 pxp pxp 12 R-Ql KR-N1 32 R(l)xP P-Q4 13 R-Nl N-N3 33 PXP pxp 14 P-N3 B-QB1 34 Rf4)-B3 R-N8 15 BxB QxB 35 R-Bl N-K5 16 K-N2 Q-R3 36 R(3)-B2 RxR 17 B-N2 P-B5 18 P-QN4 Black is forced to exchange his active rook since 36...R-N6 fails to This gives Black the chance to re­ 37 N-R5. establish material equality. 37 RxR R-N3 18 ... N-R5 38 K-K3 K.-B3 19 NxN QxN 39 K-Q4 K-K3 20 QxQ RxQ 40 P-B3 N-B3 21 P-QR3 N-K5 22 BxB Tt would seem that Black should save this ending. His threat is 41... K- While is forced to exchange Q3. attacking the knight which bishops, which naturally leads to a defends the QNP. However, a small weak pawn at his QR3. 22 N-Q4? is a but important tactical point destroys mistake—22...P-B6 23 B-BI N-Q? this illusion.

32 ROUNDTWO

41 R-B5! N-Q2 42 P-NSt

This finally saves the QNP, since after 42...NXR 43 K*N the rook has no safe square.

42 ... N-B3 43 N-N4 R-Nl 44 R-B6ch Resigns

33 PORTOROZ/LJUBLJANA 1975

ROUND THREE

June 4th

White Black Opening Result Moves 17 Baric (1) Garcia (1) Grunfeld Defence H 24 18 Ljubojevic (lj) Furman (1|) Giuoco Piano H 33 19 Karpov (2) Parma (1) Ruv Lopez H 24 20 Hort (lj) Osterman (0) Grunfeld Defence 1-0 30 21 Musil (1) Portisch (|) Sicilian Defence 0-1 36 22 Velimirovic (1) Karnar (|) French Defence 1-0 24 23 Planinc (0) Gligoric (1$) Ruv Lopez 0-1 40 24 .Mariotti (U) Ribli (11) Larsen's Opening H 13

Only one short draw in this round; Mariotti and Ribli played only 13 moves and both were afraid of continuing an interesting duel, where players of the classic school would prefer the black.pieces with the advantage of the bishop pair. For the first time in the tournament the World Champion had a difficult lime in (he game Karpov-Parma, which was short, but full of life. Parma had prepared a special variation in the Schliemann Defence and it was the Champion who had to think. Parma's homework was rewarded with a half point, but the whole variation seems too hazardous. Instead of 14 P-Q4, 14 B- B7eh or 14 N-B3! (Karpov’s suggestion) might give White better chances. Musil was systematically pushed to the wail in an endgame played with precision by Portisch. In the game Hort-Osterman, Black went completely wrong strategically, and his poor king was defenceless. Vclimirovic could sacrifice with almost no risk against Karnar, who pul up little resistance. Barle wanted just to recover after his loss in the previous round, but he had to play carefully as White against Garcia to keep an equal game and prevent the black knight reaching While’s QB4. Pianino suffered his third loss in a row, this time against Gligoric. He sacrificed a piece in the “ Romantic" manner but did not get anywhere near to the black king. Gligoric co-ordinated his defence well and the game was over after he won a pawn. The most exciting game was Ljubojevic-Fur man, a Giuoco Piano which did not give Ljubojevic much. “ Lubo” refused, and later offered, a draw to Furman. After Black’s 31st move While stood belter, but Ljubojevic forgot to grab the QNP immediately. Furman profited by playing 32...R-R6! and accepting a draw in a position that looked more like a Benotii than a Piano.

34 ROUND THREE

GAME 17 10 BxN Pxp 11 P-N5 N-N3 While Baric 12 0-N3 R-N5 Black: Garcia 13 B-K2 Q-Q2 14 0 -0 KR-B1 Grunfcld Defence 15 P-KR3 BxN 16 BxB P-K3 1 P-04 1N-KB3 17 B-K2 N-B5 2 P-0B4 P-KN3 18 B-Kl R-B2 3 N-QB3 P-04 19 P-0R4 0R-QB1 4 N-B3 B-N2 20 B-QN4 B-Bl 5 P-K3 0 -0 21 BxB RxB 6 P-QN4 P-B3 22 0-N4 R(B1)-B1 7 B-N2 N-K5 23 R-B2 P-N3 8 R-Bl N-02 24 KR-B1 N-R4 9 Pxp NxN 25 Drawn

The spectators. Pirc is walking towards the camera and Matanovic (light shirt) can be seen in the balcony.

35 PORTOROZ/LJU BLJ AN A 1975

GAME 18 15 N-R5 R-Nl 16 R(R2)-K2 White: Ljubojevic Black: Furman White prepares P-04 but Black, by bis next move, gets threats on the Giuoco Piano K-side,

Notes by Furman 16 ... N-R4 17 B-K3 BxB(K6) 1 P-K4 P K4 18 R*B N(N3)-B5 2 N-KB3 N-QB3 19 K-R2 3 B-B4 The knight at B5 is rather un- An attempt, characteristic of leasant, so White prepares to Ljubojevic, to get away from the most dislodge it. deeply studied lines. 19 ... BxB 3 B-B4 20 Q*B 4 P-B3 N-B3 5 P-QN4 B-N3 20 NxB would be an error because 6 P-Q3 P-Q3 of 20...Q-Q2, threatening both... 7 P-QR4 P-QR3 QxQRP a n d .. .N*NP. 8 QN-Q2 0 -0

9 0 -0 N-K2 20 ... QQ2 21 N-Nl P-QN3 A good manoeuvre. Black removes 22 N-B4 P-QN4 his knight from the threat of a pawn 23 pxp Pxp push, and moves it towards the K- 24 N-R5 N-K3 side. There is no need for Black to worry about losing control of his 0 5 square since 10 P-Q4 PxP 11 Pxp P- Q4 would break up White's centre.

10 B-N3 N-N3 11 N-B4 B-R2 12 R-R2 P-R3 13 R-Kl R-Kl 14 PR3 B-K3

White has got nothing from the opening, while Black’s pieces are rather well placed.

36 ROUNDTHREE

It was simpler to play 24...P-QB4. 2 N-KB3 N-QB3 Now White uses the unprotected 3 B-N5 P-B4 knight at R4 to make an energetic 4 N-B3 pxp advance in the centre. 5 NxP(K4) P-Q4 6 Nxp PxN 25 P-Q4 PxP 7 NxN Q*N4 26 PxP P-QB4! 8 Q-K2 N-B3 9 P-KB4 Q-RSch Black, in his turn, plays a move 10 P-N3 Q-R6 based on the fact, that the knight at 11 N-K5dls ch P-B3 R5 is unprotected. Of course not 12 B-B4 B-QB4 26...NXP? 27Q-Q1. 13 P-Q3 N-N5

27 P-Q5

If 27 NPxP PxP 28 P-Q5 then 28...Q-B2ch.

27 ... N-Q5 28 Q-Ql N-KB3 29 N-B3 NxNch 30 QxN PxP 31 N-B6 R-Rl 32 Q-K2

White has the better pawn structure, hut the pressure on his KP balances this out.

32 ... K-R6 14 P-Q4 NxN 33 Q*V Drawn 15 0*P BxP 16 PxN Q-N5 17 QxQ BxQ GAME 19 18 P-B3 BxKP 19 0 -0 0 -0 -0 White: Karpov 20 B-KN5 QR-B1 Black: Parma 21 K-fTC P-KR3 22 B-K3 P-QN3 Ruy Lopez 23 QR-K1 RxR 24 BxR B-B3 1 P-K4 P-K4 25 Drawn

37 PORTOROZ/LJUBLJANA 1975

GAME 20

White: Hort Black: Ostcrman

Grunfeld Defence

Notes by Hort

1 P-Q4 N-KB3 2 P-QB4 P-KN3 3 N-QB3 P-Q4 4 pxp NxP 5 P-K4 NxN 6 PxN B-N2 7 B-QB4 P-QB4 8 N-K2 N-B3 9 B-K3 0 -0 10 0 -0 Q-B2 11 R-Bl R-Ql Hon 12 B-B4?!

This move has been used many times in tournament praxis since the Alekhine Memorial Tournament, 16 N-Q4 B-N2 Moscow 1971. Also possible are 12 P- B4, 12 P-KR3, 12 Q-Q2 etc. An interesting possibility for Black was 16...Q-N5!? After the text move White gets very convenient pressure 12 ... Q-Q2 on the central lines. The only move, but a good one. 17 R-Kl P-K4 1 18 PxPe.p. pxp 13 P-Q5 N-R4 i 19 B-N5I R-KB1 14 B-Q3 P-B5?! 20 Q-N4 QR-K1 21 R(B1)-Q1 Better is 14...P-QN4 as was played in the game Hort-Garcia (Game 65). Now it is clear that the Q-file Now it will be too late for the belongs forever to White. blockade . . .P-K4. 21 ... Q-KB2 15 B-B2 P-N3 22 Q-N3 P-QR3

38 ROUND THREE

Othcrwi.se 23 N-N5 woutd win 29 P-R5 immediately. White now has time to prepare methodically a break on the White is not interested in taking king’s wing. pawns.

23 P-K5 29 ... pxp 30 NxRP Resigns The bishop on KN2is dead. His position is defenceless. A very 23 ... B-Q4 clear, methodical win!

No better is 23...N-B3 24 NxN B*N 25 R-Q6 etc.

24 R-K3 N-N2 25 N-K2 N-B4 26 N-B4 B-N2 GAME 21

The only chance to offer more White: Musil resistance wras 26...N-Q6. By- Black: Portisch sacrificing a pawn, Black could have exchanged White's important Sicilian Defence attacking piece. Black hoped to bring his knight to the defence of his Notes by Portisch king. 1 P-K4 P-QB4 2 N-KB3 P-Q3 3 B-N5ch B-Q2 4 BxBch

This line has recently become popular amongst players of the white pieces who wish to avoid the normal variations.

4 ... N*B

Usual is 4...QxB. The text is rather novel, and although it was played recently (in the game 27 P-K.R4 K-Rl Kuijpers-Browne, Wijk aan Zee 28 R-Q4 N-Q2 3975) it is still relatively unknown.

39 PORTOROZ/LJUBLJANA 1975

5 P-Q4 pxp 10 ... P-N3 6 Q*P KN-B3 11 P-K5 N*P 7 0 -0 Q-N3! Already Black is slightly better. On the principle that if, in the Sicilian, Black can exchange queens, 12 NxN PxN he has a perfectly satisfactory game. 13 Rxp N-Q4 14 P-QB3 O-O-O! 8 Q-R4 15 R-Kl P-K4!

If 8 QxO NxQ, Black gets control Also possible is 15...B-N2 but I of his QB5 square and his rook can wanted to build a strong centre and operate along the QB-file. to put my bishop on QB4.

8 Q-B3 9 Q*Q PxQ 10 R-Kl

A rather weak idea, threatening to simplify by P-K5.

16 P-KN3

White wants to control KB4 so that he can play N-Q2 without fear of ...N-B5. Naturally, not 16 Rxp because of 16...N-N5 17 N-Q2 N-Q6 18 R-K2 B-R3 and White is lost.

16 ... P-B3 17 N-Q2 B-B4 18 N-B4 P-KR4

A useful positional move, not only Porlisch threatening 19...P-R5 but also

40 ROUND THREE

taking the square KR6 away from If 20...RxN 21 P-B4 with some White's bishop. Now White is behind counterpfay. in development and so he must try to exchange material. 21 B-K3 K-B3 22 QR-Q1 P-N4 19 N-K3 23 K-N2

Slightly better was 23 BxB KxB, though after ...R-Q3, ...R-QN1 and ...P-QR4-R5 Black has a clear ad- vantage.

23 ... P-Q5! 24 PxP pxp 25 B-Q2 R(Q1)-K1

It is important to exchange one pair of rooks, but 25...R(R1)-K1 would be wrong because of 26 B-R5.

26 K-Bl K-Q4 27 B-R5 RxRdb A critical moment. Black has a 28 KxR R Q N i number of good moves, e.g. 19...N- 29 P-N3 K-K5 N3, but then 20 R-Ql exchanges one 30 K-K2 P-N5 pair of rooks; or 19...NXN 20 B*N 31 R-Q3 P-B4 B*B 21 Rxf3 R-Q7 22 R-Nl KR-Ql 23K-BI R-B7 24 R-K2 R(Q1)-Q7 25 Now White is completely lost. RxR RxR 26 K-Kl R-B7 27 R-Qlf, with some counterplay in the rook 32 B-Q2 ending (27...RxNP 28 R-Q6). It is quite understandable from this last If 32 P-B3 PxPch 33 RxP B-Q3, variation why I now played. and there is no defence to the threat of ...R-QB1. 19 ... KB2 20 NxNeh 32 ... RQB1 33 P-B3 PxPdi Forced. There is no other plausible 34 RxP B-Q3 move, 35 R-Bl R-B7 36 K-Ql RxP 20 ... PxN 37 Resigns

41 P0RT0R07./LJUBLJANA 1975

GAME 22 22 RxB NxR 23 R-Nl Q-Qi White: Vclimirovic 24 NxNP Resigns Black: Karnar GAME 23 French Defence White: Planinc 1 P-K4 P-K3 Black: Gligoric 2 Q-K2 P-0B4 3 N-KB3 N-QB3 Ruy Lopez 4 P-KN3 B-K2 5 B-N2 P-Q4 Notes by Gligoric 6 P-K5 P-KR4 7 P-Q3 N-R3 1 P-K4 P-K4 8 P-B3 N-B4 2 N-KB3 N-QB3 9 P-KR3 P-0N3 3 B-N5 P-QR3 10 QN-Q2 B-N2 4 B-R4 N-B3 11 0 -0 0-B2 5 0 -0 B-K2 12 R-Kl 0 -0 -0 6 R-Kl P-0N4 13 N-Bl P-05 7 B-N3 P-Q3 14 P-B4 QR-N1 8 P-B3 0 -0 15 B-N5 N-Ql 9 P-KR3 P-R3 16 BxB 0*B 17 N|B1)-Q2 P-B3 If White can do it. then wh 18 P-R3 IN-R3 Black9 19 P-QN4 P-B4 20 PxP PxP 10 P-Q4 R-Kl 21 0R-N1 P-N4 11 QN-Q2 B-Bl 12 N-Bl B-02

Usually I play 12...B-N2, but then in some lines if Black does not manage to play ...P-Q4 he has a difficult game.

13 N-N3 N-QR4 14 B-B2

Now Black's problem is to get his QN into play. If 14...P- B4 15 P-N3.

14 ... N-B5

42 ROUND THREE

Now Plannic thought for a long 23 Q-Q3 R-N3! time, which surprised me because I had played this line quite recently Not 23...P-N3? 24P-B5. (against Kavalck at Wijk aan Zee 1975) and I had expected him to be 24 P-B5 Pxp prepa red for it. 25 PxP

15 P-N3 If 25 PxR PxQ 26 PxPch K-Rl 27 pxR=Q BxQ 28 BxP P-B51, and Better is 15 P-QR4, preparing White has insufficient compensation P-N3. for the queen.

15 ... N-N3 25 ... R-N4 16 B-N2 P-B4 26 P*B6 17 PxKP pxp 18 P-B4 A better chance was 26 N-K4 RxBP when 27 R*R BxR 28 N-B6ch The position is similar to the game NxN 29 QxB P-N3! 30 QxN B-N2 Geller-Gligoric, Belgrade 1970, but gives Black a won endgame, and so here my QB is better placed for the White must play 27 N-Q6 when the defence of the K-side than if it were situation is less clear. on QN2. But Black can also sacrifice by 26..-RxKP, when he gets three pieces 18 ... Q-B2 for two rooks and he keeps the advantage.

26 ... P-N3 27 P-KR4 R-N5 28 P-R5 B'RS!

19 NxP RxN 20 P-B4 R-K3 21 P-K5 QR-K1! 22 R-KB1 N-R2

43 PORTOROZ/UUBLJANA 1975

The key move, and the idea behind 40 Q-N3ch B-N2 the pawn exchange on move 24, 41 Resigns

29 P*P BxB If 41 R-B6 NxR 42 PxN Q- 30 P*Nch K-Rl etc. 31 QxB RxN GAME 24 White has two pawns for the piece but the pawn on R7 is a goner and White: Mariotti the one on K5 is weak. Black: Ribti

32 QJR-K1 Q-B3 Larsen’s Opening 33 R-B4 Q-K3 1 P-QN3 P-K4 Blockading on (he light squares. 2 B-N2 P-03 3 P-K3 N-KB3 34 R(K1)-K4 N-Q2 4 P-Q4 PxP 35 Q-K2 R-N4 5 QxP N-B3 36 R-N4 RxR 6 B-N5 Q Q 2 37 RxR NxBP 7 Q-QR4 B-K2 38 R-B4 NxP 8 N-KB3 P-0R3 39 Q-KB2 9 B{N5)xN PxB 10 N-B3 P-B4 if 39 RxP QxR 40 P- kodis ch 11 0-KB4 Q-B4 B-N2 winning. 12 QxO BxQ 13 0 -0 -0 0 -0 -0 39 ... K-Nl 14 Drawn

44 ROUND FOUR

ROUND FOUR

June 5th

White Black Opening Result Moves 25 Garcia (11) Ribli (2) Sicilian Defence jj-J 20 26 Gligorie (21) Mariotti (2) Queen’s Gambit Dec. 1*1 33 27 Kamar (1) Planinc (0) Dutch Defence 0-1 45 28 Portisch (11) Velimirovic (2) Benoni Defence 0-1 40 29 Osterman (0) Musil (1) Queen’s Indian Def. J-J 15 30 Parma d l) Hurt (21) Caro-Kami Defence H 14 31 Furman (2). Karpov (21) Queen’s Gambit Dec. 1*1 14 32 Barle (1) Ljubojevic (2) Polish Defence 1-J 19

This round was probably hated by spectators, who could see “draw” appearing quite early on many demonstration boards; peaceful rounds were in fact an exception in the Vidmar Memorial, but for some reason this seems to happen in almost every tournament. Fnrman-Karpov was expected to be a draw and it: would have been a poor return from a World Champion to his trainer and second if the result had been otherwise. The game Parnra-Hort was also a short draw and neither showed much fighting spirit, Barle-Ljubojevic was a Polish Defence in which Ljubojcvic was afraid of having an inferior position and Barle was afraid of his strong opponent. Osterman-Musil was only 15 moves, with no try at all. Garcia and Ribli played a Najdorf Variation that both of them liked, but after P-QR3 White's position looked horrible. Garcia succeeded in forming attacking possibilities on the K-side and somehow persuaded Ribli to repeat moves as the best way out. Gligorie was better during the whole game against Mariotti and it was a miracle that Black managed to save this game. Tti the game Karnar-Planinc White continued his weak performance and Pianino sacrificed a queen for a rook, bishop and pawn. White’s queen was hopeless against the increasing pressure from the black army and the game was finished by the march of the QNP, as in the game Osterman-Karpov .from the second round. The central and best game of the round was Portisch-V cli mi rovic. it was their first encounter and the Benoni was expected, since both of them like it. After the game Portisch was convinced that he had missed some strong continuation. But where? ft remains a secret until the next Benoni duel of these two great players.

45 PORTOROZ/LJUBLJANA 1975

GAME 25 4 P-K3 P-B3 5 N-B3 QN-Q2 While: Garcia 6 B-Q3 B-Q3 Black: Rlbii 7 0 -0

Sicilian Defence U is strange that Gligorie. who 1 P-K4 P-QB4 played this system for many years, 2 N-KB3 P-Q3 does not know that the best move 3 P-Q4 PxP here is 7 P-K4! e.g. 7...PxRP 8 NxP 4 NxP N-KB3 NxN 9 BxN 0-0 10 0 -0 and While 5 N-QB3 P-QR3 is much better. 6 B-KN5 P-K3 7 P-B4 B-K2 7 ... 0 -0 8 Q-B3 Q-B2 8 P-K4 PxBP 9 0 -0 -0 QN-Q2 10 P-KN4 P-N4 11 P-QR3 R-QN1 8...PxKP leads to the same 12 BxN PxB position discussed in the previous 13 P-B5 N-K4 note. 14 Q-R3 P-N5 15 PxNP RxP 9 BxP P-K4 16 pxp PxP 10 B-KN5 P-KR3 17 P-N5 Q-R4 18 N-N3 Q-B2 19 N-Q4 Q-R4 if 10...Pxp 11 Qxp Q-K2 12 QR- 20 N-N3 Q-B2 Q1 B-B4 13 0-03 N-K4 14 NxN QxN 21 Drawn 15 B-R4, White lias the advantage.

11 B-R4 0-K2 GAME 26 12 R-Kl R-Ql

White: Gligoric Naturally, not 12...PXP 13 P-K5! Black: Mariotti

Queen's Gambit Declined 13 B-KN3

Notes by Mariotti Euwe gives 13 Q-B2 as best here, followed by QR-Q1 and B-Bl, but 1 P-Q4 P-Q4 this new move of Oliguric's looks 2 P-QB4 P-TC3 good, because it is not easy to find a 3 N-QB3 N-KB3 convincing move for Black.

46 HOUND FOUR

with a strong attack; however, it is not clear whether Black would have enough compensation foT the pawn.

22 ... BxN 23 PxB QxP 24 QxBP

If 24 Nxp N(R4}-B5.

24 R-N3 25 Q-K4 QxQ 26 RxQ N-B3 27 R-QN4 13 ... N-KR4?! Now White hoped to gain the What else? If 13...P-QN414 B-N3 advantage after 27...P-R3 with 28 P- B-N2 15 N-KR4!; and if 13...N-N3 QR4; but he overlooked Black's next 14 PxP, when 14...Bxp docs not move, sacrificing a pawn for a very work because of 15 BxPch! active position and forcing White to play very carefully. 14 Pxp B-Nl!

If 14...NxP 15 NxN BxN 16 BxPch!

15 P-K6 Pxp 16 BxB RxB 17 Q-Bl P-QN4 18 B-Bl P-K4

Black’s position is now looking a little better.

19 N-Ql Q-B3 20 N-K3 N-Bl 21 Q-B5 N-N3 27 ... P-QR4! 22 N-B5?! 28 RxP RxR 29 BxR P-K5 White is afraid to take the QRP 30 N-Kl R-Q7 because of . . .R-N2 and . . .R-KB2 31 P-B3

47 PORTOROZ/LJUBLJANA 1975

After 31 P-QN3, N-B5 is very played better: 9 R-Nl B-Q2 10 P-N3 dangerous for Whi (e. N-B2 11 P-QR4 P-QR3 (Probably 11 ...P-N3 is better.) 12 P-QN4 and 31 ... RxQNP White had much the better position. 32 B-Bl P*P 33 NxP Drawn 7 ... P-B3

After 7...N-B3 8 P-Q5 N-QR4 GAME 27 (White is also betler after 8...N-K4 9 NxN PxN 10 P-K4!) 9 Q-FU P-N3 While: Karnar (Also after 9...P-B4 10 P*Pe.p. Black: Planinc N*P(B3) 11 R-Ql White is slightly better.) 10 Q-B2!, White has good Dutch Defence play because of Black’s weaknesses Notes by Parma on the light squares.

1 N-KB3 P-KN3 8 Q-B2 2 P-KN3 B-N2 3 B-N2 P-KB4 Not the best 1 Usually White plays 8 P-Q5 (In the game Suetin-Sniejkal, The Leningrad system. The idea is Ljubljana 1973, White played 8 R- to combine the Dutch Defence and N1 ?! but after 8...N-K5 Black had the King’s Indian Defence. White no problems at all. Another must try to play P-K4 as soon as possibility is 8 R-Kl trying to play an possible and create play on the K- immediate P-K4, but the game file. Gheorghiu-Sax. Teesside 1972, showed that this plan is not good 4 P-04 N-KB3 enough for an advantage: 8-.N-R4 9 5 0 -0 0 -0 P-KR3P-K4 10 P-K4 I’xQP! 11 Nxp 6 P-B4 P-Q3 P-B5 with a complicated but 7 N-B3 satisfactory game for Black.) 8...Q- R4 (After 8...P-K4 9 PxKPe.p. Bxp Another possiblity is 7 P-Q5 to 10 0-03, White has a slight which the best answer is 7...P-B4. In advantage.) 9 N-Q4 Q-B4 with a the game Korchnoy-Tal, 1968. after complicated game and with chances 8 N-B3 N-R3 9 N-Kl R-Nl 10 N-B2 for both sides. Langeweg-.Iansa. N-B2 11 P-QR4 P-N3 Black had Amsterdam 1974. quite a good position, which looks like one arising from the Benorii 8 ... N-R4 Defence. But in the game Petrosian- Matulovic. Sarajevo 1972, White Black cannot do anything against

48 ROUND FOUR

P-K4 and so he prepares to meet 9 P- 16 ... P-R4 K4 with 9...P-B5. 17 B-KB1 BB4 18 Q-Bl QR-Qi 9 P-KR3 P-K4 19 BxN PxB 10 PxP PxP 20 N-K3 B-Q6 11 P-K4 N-R3 21 P-R3 P*K5 22 R-R2 Of course not 11 ...P-B5 because of 12P-KN4. White is completely without counterplay, but he could try to 12 P-N3 N-N5 sacrifice the exchange (22 P*P) with 13 Q-Nl P*P some chances to stay in the game. 14 R-Q1?

22 . . . R-R1 White has to play 14 NxP(K4). 23 P-BS K-Rl because now Black has the possibility 24 K-R2 B-Q5 to sacrifice his queen, after which he 25 P-QR4 QR-K1 will have a good game and enough 26 N-N4 N-N2 compensation. 27 R-Q2

Also, after 27 Q-Ql, Black can play 27...B-B6 28 BxB R-Ql and 29..,PxB. For the last 13 moves Black had only two minutes, but in such positions it does not mean so much.

27 ... B-B6 28 R-Qt B-K7 29 BxB

The last chance was 29 R-Q7. trying to find some tactical possibilities.

29 PxB 30 R-Kl P-R4 14 ... QxRch! 31 RxP PxN 15 NxQ pxN 32 0-R6ch K-Nl 16 B-R3 33 QxP P-K6 34 PxKP PxP After 16 B-B1 B-B4 White is lost. 35 KxP R-B6

49 PORTOR OZ/LJU B LJAN A 1975

36 P-K4 B-K4 Reykjavik 1974. and Lombardy- 37 R-KN2 RxQNP Velimirovic, Amsterdam 1974, Black 38 Q-N5 R-KB6 executes a new plan of attack on the 39 Q-N4 R-K6 K-side, beginning with ...N(B3)- 40 P-R5 P-N6 N5! I would like to mention that at 41 Q-N5 RxKP the Interzonal Tournament in Palma 42 R-KB2 R-K8 (1970) I showed Fischer what was at 43 Q-Q2 R-QR8 that time a quite original idea, 44 0-03 P-N7 beginning with the move 13...N- 45 Q-B4ch R4!?, which made a strong and White resigned impression on him. A few months later I ascertained that ...N-R4 was an incorrect move and about 1971 came up with the idea of ...N{B3)- GAME 28 N5. Portiseh was familiar with this development of ideas and he chose a White: Portiseh new move which I did not, however, Black: Velimirovic find too surprising.

Modem Benoni

Notes by Velimirovic

1 P-Q4 N-KB3 2 P-OB4 P-B4 3 P-05 P-K3 4 N-OB3 Pxp 5 pxp P-Q3 6 P-K4 P-KN3 7 N-B3 B-N2 8 B-K2 O 0 9 0 -0 R-KJ 10 N-Q2 QN-Q2 11 P-QR4 P-QR3 12 Q-B2 N-K4 13 R-R31?

A position which has attracted With this move White actually my attention for many years. As makes any ideas of an attack on the a rule. White has replied with 13 K-sidc impossible and, what is more, P-QN3 which has, until now, threatens an ingenious transfer of his been considered crucial, but after rook to the QN-filc. Black discovers a the games Ogaard-Velimirovic, correct plan which consists of

50 ROUND FOUR exerting pressure down the K-file, 18 ... Q-B2 thereby reducing White’s activity in the centre to a minimum. A tactical oversight. Correct is 18.. .N-R4! when after 19 P-B4 (if 13 ... Q-K2! 19 N-B4 Q-R5!) 19...N-N5 20 BxN BxB 21 N-B4 B-Q5, Black is left with 13...Q-B2 would be a mistake, as a strong initiative on the K-side, hut after 14 P-B4 White gains the 21.. .Q-R5 is dubious on account of advantage; 14...N(K4)-N5 (If 22K-N1 B-Q$ch 23 B-K3. 14...N(K4)-Q2 15 N-B4 etc.) 15 N- B4 N-R4 (After 15. . .Q-K2 16 B-B3 19 P-B4 N(K4)-Q2 N-R4 17 N-K2, White has a clear advantage.) 16 Q-Ql B-Q5ch 17 K- R1 N-B7ch 18 RxN BxR 19 BxN PxB 20 Qxp. with a decisive attack for White.

14 PR 5 B-Q2 15 R-N3 QR-N1 16 R-N6

Having completed the strategic plan started at move 13. White now' threatens P-B4 and P-K5. However it is Black’s move and with it he shows the weaker side of the white rook’s position, while at the same time limiting the effectiveness of the white bishop. 20 P-K5?l

16 ... B-N5 While over estimates his position 17 P-B3 and allows Black to correct his mistake. After the correct 20 N-B41 White can do no better as after 17 NxR 21 PxN O-Ol 22 P-R3, White BxB N(B3)xB 18 P-R3 N-R3 Black is would have the better chances thanks excellently placed for counterplay in to his powerful centre. the centre. 20 ... PxP 17 ... B-QB1 21 Pxp Qxp 18 K-Rl 22 N-B4 Q-Q5

18 BxP fails to 1B...N(K4)*Q2. Portisch probably overlooked this

51 PORTO ROZ/LJUBLJANA 1975 move. The black queen is in an Although desperately short of endangered position but it is very time, Black discovers the right way of difficult for White to exploit this, maintaining the initiative. 27 RxN e.g. would be weak now because of (a) 23 R-B4 NxR 24 NxN B-B4 25 Q- 27...BxR 28 BxR QxN etc. N3 Q*N, and Black wins; (b) 23 R(N6)xN NxR 24 R-B4 B-B4 27 R-K6 RxR 25 Q-N3 R*B 26 NxR QxQP, with a 28 BxR winning position. So now White has only one move. Or 28 PxR PxB 29 P-K7 {Not 29 PxN BxP 30 N-N6 R-Ql 31 R-Ql BxN etc.) 29...N-B3 30 N-K5 0-R4 23 R.Q6 N-N5 31 QxKBP B-K3. when White has no 24 BxN Q*B compensation for the piece. 25 Q-B2 P-B4 26 B-B4 P-KN4! 28 ... B-Q5!

Dragoljub Veliminwic — The reigning Yugoslav Champion.

52 ROUND FOUR

An excellent reply which surprised 30 PxN BxP White, who by now was also very 31 N-K5 Q-Q5! short of lime. 28...R-R3 is weaker because of 29 N-K3, while 28...QxN After 32 NxB QxNQ2 33 RxB Q loses alter 29 PxR. K1 apiece falls.

32 R-Ql 0 - 0 N5 33 NxB B-Q5 34 B-K5 QxNP 35 BxB , PxB 36 N-Q5 Q-K7 37 R-QB1 K-B2 38 PR3 P-Q6 39 R-B7 K-K3 40 N{Q7)-N6 P-Q7 41 Resigns

29 PxR GAME 29

After this move White’s position, White: Osterman becomes untenable. 29 Q-N3 is Black: Musil better, but even then Black’s position is still better. 29...R-R3! leads to 30 Queen’s Indian Defence QxQ (30 Q-B7 is very weak because of 30...P-B5! 31 QxBeh K-N2, fol­ 1 P-Q4 N-KB3 lowed by ...RxPch!) 30...PxQ, and 2 N-KB3 P-K3 now the following continuations are 3 P-B4 P-QN3 possible: 4 P-KN3 B-N2 (a) 31 B-N3 N-B3 32 N-N6 B-Q2 33 S B-N2 B-K2 NxB NxN 34 P-Q6 R-B3 35 R-Kl P- 6 N-B3 N-K5 R4 36 N-K4 R-B4 37 P-R4 7 Q-B2 NxN P(N5)xPe.p. 38 PxP P-R5 39 B-R2 8 QxN B-K5 K-B2 and Black should win; or 9 0-0 0.0 (b) 31 B-B7 N-B3 32 N-N6 B-Q2 33 10 N-Kl BxB NxB NxN 34 N-K4 R-KN3 35 P-QN3 11 NxB P-KB4 R-N2, with Black being better 12 B-K3 B-B3 placed. 13 KR-Q1 P-03 14 QR-B1 N-Q2 29 ... BxQ 15 0-N3 Drawn

S3 PORTOROZ/LJUBLJANA 1975

GAME 30 8 B-Q3 P-N5 9 N-K4 NxN White; Parma 10 BxN B-N2 Black: Hort 11 0 -0 B-K2 12 Q-K2 0 -0 Caro -Kami Defence 13 R-Ql Q-N3 14 B-Q2 P-0B4 1 P-K4 P-QB3 15 Drawn 2 P-Q4 P-Q4 3 N-QB3 P-KN3 4 P-KR3 B-N2 5 N-B3 N-KB3 6 B-Q3 PXP 7 NxP NxN 8 BxN N-Q2 9 0 -0 0 -0 GAME 32 11) R-KI R-Kl 11 P-B3 P-K4 White: Barie 12 pxp NxP Black: Ljubojevie 13 QXQ NxNch 14 BxN RxQ Polish Defence IS Drawn 1 N-KB3 N-KB3 2 P-KN3 P-QN4 3 B-N2 B-N2 4 0 -0 P-K3 5 P-Q3 P-B4 6 P-K4 P-Q3 GAME 31 7 P-QR4 P-QR3 8 pxp PxP White: Furman 9 RxR BxR Black: Karpov 10 N-R3 Q-N3 11 B-K3 B-K2 Queen’s Gambit Declined 12 P-QN4 N-R3 13 pxp pxp 1 P-Q4 P-Q4 14 Q-RI 0 -0 2 P-QB4 P-QB3 15 R-Nl P-NS 3 N-KB3 N-KB3 16 N-B4 Q-N4 4 N-B3 P-K3 17 N(B3I-K5 NxN 5 P-K3 QN-Q2 18 QxN N-Q2 6 B-Q3 pxP 19 Q-B7 Q-B3 7 BxBP P-QN4 20 Drawn

54 ROUND FIVE

ROUND FIVE

June 7 th

White Black Opening Result Moves 33 Ljubojevic (23) Garcia (2) Sicilian Defence 1-0 36 34 Karpov (3) Barle (11) King’s Indian Def. 1-0 24 35 Hort (3) Furman (21) Sicilian Defence 0-1 54 36 Musil (1) Parma (2) King's Indian Def. 1-1 20 37 Velimirovic (3) Osterman (1) Ruy Lopez 1-0 38 38 Planinc (1) Portisch (ll) Sicilian Defence 1-0 59 39 Mariotti (21) Kamar (1) Bcnoni Defence 1-0 38 40 Ribli (21) Gligoric (3) Grunfeld Defence 1-1 22

The rest day had renewed the fighting spirit of most players and the fifth round was very interesting. In the game Karpov-Barle Black tried something new against the Saemisch. hut Karpov proved that the old system with . . .P-K4 is more reliable. Barle lost a pawn and when he did not find any serious chances against White’s extra OP the game could not last long. Relatively short draws were agreed in the games Musil-Parma and Ribli- Gligoric. In both games symmetrical systems were played: in the first the Yugoslav Variation of the King’s Indian, in the second a fianchetto in the Grunfcld Defence. Ribli tried to occupy the weak QBS square, but after Gligoric’s correct reaction ...N-R4-B3-Q2 and pushing the QRP, White lost all of liis advantage. • Velimirovic beat Osterman comparatively easily and Mariotti beat Kamar; both Slovenians played very passively and Karnar could not move even a single piece. Ljubojevic did not want to castle Q-side in the Dragon Variation against Garcia and he used another recommended system. He played what was probably his best game in the tournament and his win was very impressive. The most interesting games were played between Planinc-Portisch and Hort- Furman, and both were adjourned in unclear positions. Portisch was later of the opinion that he should not have sacrificed the exchange in the middle game because the co-operation of the white rooks was fatal to his king. Hort also missed a strong continuation in the middle game where he played 35 N- Q3?—better is 35 B-B4! After the adjournment Furman refused the offer of a draw, and Hort then lost his objectivity and played for a win with 48 P-B6? After that move it was not only his objectivity that was lost, and with this win Furman started to become serious competition even for Karpov.

55 PORTOROZ/LJUBLJANA 1975

GAME 33 12 P-B4

White: Ljubojevic The only way to keep the initiative, Black: Garcia as Black was threatening . . ,R*N and . . .NxKP. Sicilian Defence 12 ... N-B5 Notes by Ljubojevic 13 BxN R*B 14 0-03

1 P-K4 P-QB4 Aiming, after . . .R-QB1, to play 15 2 N-KB3 N-QB3 QR-Q1, with strong pressure down 3 P-Q4 pxp the central files. 4 Nxp P-KN3 5 N-QB3 14 ... Q-Bl

e positional is 5 P-QB4. Mor And not 14.. . P-QN4 because of 15 P-K5! 5 B-N2 6 B-K3 N-B3 7 B-QB4 0 -0 8 0 -0

I decided to play quietly, so as to avoid the well known theoretical variations arising front 8 B-N3 followed by P-B3 and Q-Q2.

8 ... P-Q3 9 P-KR3 B-Q2 10 R-Kl

So as after an eventual N-Q5: N*N PXN to have pressure down the K- 15 P-K571 file. It was better to first prepare this by­ playing QR-Q1. 10 ... R-B1 II B-QN5 N-K4 15 ... N-R4

11...N-QR4 is bad on account of After first exchanging on K4, 12 Q-Q3! Black would have no problems.

56 ROUND FIVE whereas now White has almost a forces the black rook to a bad forced win. square.

16 N-Q5 R-Kl 21 ... R-B4 17 PxP pxp 22 NxN BxN 16 BB2 K-Bl 23 N-B3 R-B3

If 18...B-K3then 19P-QN3. Taking the pawn on QB7 leads to a beautiful mate, e.g. 23...RxP 24 19 RxRch BxR QxQPch K-N2-25 QxBch KxQ 26 B- 20 R-Kl N-B3 Q4ch K-B4 27 R-KScli KxP 28 B- 21 P-QN3 K3ch K-N6 29 R-KN5 mate.

An important intermezzo which 24 B-Q4 0-01

Ljubojevic sizing up his opponent

57 PORTOROZ/LJUBLJANA 1975

II 24.,,BxBch then 25 Q*B K-NI GAME 34 26 N-N5. threatening N-K4. White: Karpov 25 BxB Q*B Black: Barle

King’s Indian Defence

Notes by Karpov

1 P-QB4 N-KB3 2 N-QB3 P-KN3 3 P*K4 P-Q3 4 P-Q4 B-N2 5 P-B3 0 -0 6 frK3

A fashionable but fairly old line introduced into praxis by the late German Grandmaster Saemisch. 26 N-N5! White occupies the centre and tries to break down Black’s defensive The decisive move. formation in a rather active way. while Black, in his turn, has an 26 ... Q*P object of attack in White’s pawn If 26...Q-N2 then 27 Q-K4 wins a centre. piece. 6 ... P-B4 27 N-K6ch PxN 28 R-KB1 QxRch A very recent innovation, 29 QxQch K-N2 sacrificing a pawn. It is an original 30 Q-N5 K-Bl sort of concept since Black allows the The rest is really just an efficient exchange of queens. It has been very mopping up operation. little studied, but my view is that Black has some compensation for the 31 QxP RxP pawn, but it is White for preference. 32 QxQRP B-B3 33 P-K.N4 B-Q4 7 P x P p x p 34 P-QR4 R-QN7 8 Q x Q R x Q 35 Q-N8ch K-N2 9 BxP N-B3 36 P-N4 Resigns 10 N-Q5!?

58 ROUND FIVE

The attempl to complicate by 15...B-Q5ch 16 K-N3 R-Kl is easily repulsed by 17 N-K21 B-K6 18 B-B6, and then, after both 18...N-Q6 19 B- Q4 N-B7 20 R-Nl and 18...B-QR3 19 N-B4, White will win.

16 N-K2 B-Q7 17 B-B6 N-Q6ch 18 K-N3 B-Q2

If 18...B-QR3 19 N-04 B-KBSch White wins by 20 K-R4! and 18...B- A new line. Black is practically K6 is met by the regular saving move forced to exchange knights, since 19 B-Q4. 10...P-K3 11 N-K7ch NxN 12 B*N R-Q2 13 B-R3 leaves Black still a 19 R-Ql pawn down with temporarily misplaced pieces. This forces Black into accepting a temporary exchange sacrifice. 10 ... NxN 11 BPxN BxP? 19 ... B-K8ch 20 RxB N*R A mistake that leads almost bv 21 N-Q4! force to the loss of the game. The real struggle would come after 11...P-N3, when White could play either 12 B- An amusing business with the R3 or 12 B-K3, both of which still offisdc knight unable to get out. await the test of practical play. 21 ... QR-B1 12 R-Nl B-B6ch 22 B-QNSi 13 K-B2 P*N3

The final blow, and the most Black has little choice—he must energetic course at White’s disposal. remain a pawn down. If 13.,.B-Q5ch The awkward placing of the enemy 14 BxB NxB 15 K-K3 P-K4 16 P-B4 rooks is duly exploited. P-B3 17 PxP Pxp 18 N-B3 NxN 19 P*N, White has a won ending. 22 ... BxB 14 B-R3 N-K4 23 NxB R-B8 15 BxP R-Kl 24 P-06 Resigns

59 PORTOROZ/UUBUAN A 1975

GAME 55 17 Q-Q2 QR-Ql 18 Q-Kl B-KB3 While: Horl 19 B-Bl 0-N1? Blacks Furman A faulty move which lets Wliite Sicilian Defence drive back the advanced cavalry. 19...R-0B1 or 19...N-B3 were Notes by Furman better.

1 P-K4 P-QB4 20 P-QR3 N-B3 2 N-KB3 N-QB3 21 P-QN4 N-Q2 3 P-Q4 Pxp 4 Nxp P-K3 Black has no choice other than 5 N-N5 P-Q3 going back into• passive defence, 6 P-QB4 N-B3 since 21 ...N-N6 fails to 22 BxP. 7 N(N1)-B3 P-QR3 8 N-R3 B-K2 B-K2 9 B-K2 0 -0 22 0-02 23 P-B3 R-QB1 10 0 -0 P-QN3 24 Q-KB2 N|B3)-K4 11 B-K3 B-N2 25 N-Q2 B-Rl 12 R-Bl R-Kl 26 N-R4 R-B3 27 N-N3 R(K1)-QB1 The hidden nature of threats from the rook on the K -file become 28 N-N2 R(B3) -B2 Q-N2 apparent in the line 13 P-B3 P-Q4 14 29 K-Rl BPxp pxp 15 pxp BxN, or 13 P-B4 30 JR-Q2 F-Q4 14 BPxP PxP 15 P-K5 P-Q5. In other lines the rook is not so well Despite White’s advantage in placed, so the main variation has space it is not easy for him to break been 12...N-K4 13 Q-Q4 N(K4)-Q2. down Black's defence. The correct plan is to prepare the gain of even 13 Q-N3 N-Q2 more space by driving back Black’s 14 KR-Q1 N-B4 most active piece, the knight at K4. 15 Q-B2 This can be done by 30 P-R3 or 30 B- K2. The text enables Black to gain After 15 BxN NPxB, Black gains some freedom. control of his Q5 and has an excellent game (if 16 QxB? N-R4, winning the 30 ... P-ON4 queen}. 31 R(Q2)-B2

15 ... 0-B2 Hort reckoned on exploiting the 16 N(R3)-N1 N-N5 weakness of the Q-side as now he

60 ROUND FIVE threatens P*P followed by attacking BxN but that would be a serious the QNP. If Black were to play concession. 31..,PxP, his QRP would come under attack. 41 R.Ql N-B5 42 RxR PxR 43 BxB QxB 44 NxN NP*N 45 Q-Q6 P-K4

45...Q-N7looked tempting, but 46 QxRP P-B6 47 Q-R4! followed by 48 B-Q3 would enable White to neutralize the QBP.

31 ... P-Q41 32 KPxP PxQP 33 N-R5 Q-Nl 34 P-B5 B-KB3 35 N-Q3 NxN 36 BxN N-K4 37 B-Bl R-Kl 38 B-Q4 Q-Ql 46 RxPl Black has equalized. The protected passed OBP is not very Sacrificing the exchange is White's dangerous since Black can close the best chance. After the exchange of QB-filc at the right moment by . . .N- queens White would have a difficult QB5. ending since Black’s pawns would be very strong whereas White’s pawns 39 R-K2 R{B2)*K2 arc easily neutralized. 40 Q-N3 R-K3 46 ... BxR Black has duly prepared . . .N-B5. 47 QxBch K-Bl White could consider preventing it by 48 P-B6?

61 PORTOROZ/LJUBLJANA 2975

Hort, playing to activate his game, 10 Q-R4 QxQ seems to have over-estimated his 11 NxQ P-N3 position. He should have played 48 12 N-B3 B-K3 QxBP P-K5 49 PxP RxP 50 Q-Q3 and despite the apparent danger White should not lose. As is well known it is a difficult psychological task to decide when to go over to defence and when to keep on playing actively.

48 ... R.B1 49 Q-B5eh K-Kl 50 P-B7 K-Q21

The stranded pawn falls, and White does not have enough material to embarrass the enemy king. 13 N-KN5 B-Q2 51 Bxp RxP 14 QR-Q1 0R-B1 52 Q-Q5ch 0-03 15 P-KR3 KR-Q1 53 Q-B7ch K-B3 16 R-Q2 N-QR4 54 P-N5ch K-N3 17 P-N3 B-B3 55 Resigns 18 BxB NxB 19 KR-Q1 RxR 20 RxR Drawn

GAME 36 GAME 37 White: Musil Black: Parma White: Velimirovic Black: Osterman King’s Indian Defence Ruy Lopez 1 N-KB3 N-KB3 2 P-KN3 P-B4 1 P-K4 P-K4 3 B-N2 N-B3 2 N-KB3 N-QB3 4 0 -0 P-KN3 3 B-N5 P-QR3 5 P-B4 B-N2 4 BxN QPxB 6 N-B3 0 -0 5 0 -0 B-KN5 7 P-04 P-Q3 A P-KR3 P-KR4 8 PxP PxP 7 P-Q3 Q-B3 9 B-K3 Q-R4 8 QN-Q2 N-K2

62 ROUND FIVE

9 N-B4 BxN 36 BxP N-B5 10 QxB QxQ 37 P-Q7 K-N3 11 PxQ N-N3 38 P-Q8=Q Resigns 12 K-R2 P-B3 13 B-K3 P-QB4 14 K-N3 B-Q3 15 P-R3 K-Q2 16 R-KN1 N-Bl GAME 38 17 N*B PxN 18 P-KB4 PxPch White: Pianinc 19 KXP P-KN3 Black: Portisch 20 K-B3 K-K3 21 P-N4 PxP Sicilian Defence 22 PxP N-Q2 23 K K 2 P-KN4 Notes by Parma 24 P-QB4 N-K4 1 P-K4 P-QB4 25 R(N1)-QB1 KR-QB1 2 N-KB3 P-Q3 26 R-R5 N-B3 3 P-Q4 PxP 27 R-KB5 N-K2 4 Nxp N-KB3 28 R-KB3 N-N3 5 N-QB3 P-QK3 29 P-Q4 P-R4 6 B-KN5 P-K3 30 P-Q5ch K-K2 7 P-B4 B-K2 8 0-B3 Q-B2 9 0 - 0 0 QN-Q2 10 B-Q3

This continuation is now the best, because against 10P-KN4 Black has some good systems. The text has become very popular after the Fischcr-Spassky match.

10 ... P-R3

10...P-N4 11 KR-K1 B-N2 12 Q- N3 is better for White.

31 P-B5 N-K4 11 Q-R3 32 PxQPch K-B2 33 R-K.B5 RxR Another possibility is 11 B-R4 P- 34 BxR PxP KN4 12 PxP N-K4 13 Q-K2 N(B3?- 35 BxP P-N3 N5 14 N-B3, with some advantage.

63 PO KTO RO Z / LIU BLJ AN A 1975

11 ... N-N3 Q2, with the idea of . . .0 -0 -0 . Black had a satisfactory game. The best! In the game Savon- Timman-Browne,Wijk aan Zee 1974, Shusterman, USSR 1974, BLack went 12 KR-K1, but after 12...P-K4 played 11...N-B1, and after 12 P- 13 N-B5 BxN 14 PxB 0 -0 -0 White B5?! N(B1}-R2 13 B-K3 P-K4 14 N- has nothing. Also interesting is N3 P-QN4 Black had a good game. 12 KR-B1 (Bronsieiri-Tukmakov, But it apppears that White should USSR 1974) with the idea 12...P-K4 sacrifice by 12 BxN BxB 13 B-N5ch. I 13N-B5B*N 14 QxB. with very good attacking chances. Another possibility is 11...N-B4. 12 ... P-K4 The game Planinc-Najdorf, Wijk aan 13 N-BS BxN! Zee 1973, continued 12 KR-K1 R-KNl (12...P-K4 is better, but After 13...P-N3 White has to anyway White has the advantage sacrifice his queen: 14 NxB!? BxQ 15 after 13 N-B5.) 13 P-K5! P*P 14 PxP BxN with good attacking chances. PxB 15 PxN BxP 16 N-Q5 Q-Ql 17 That is an idea of the new move 12 B- B-R7 R-Rl 18 N-B5 P-N4 19 Q-KN3 R4. K-Bl 20 NxB and Black resigned. 14 QxB

If 14 PxB, then 14...0-0-0, and Black has no more problems.

14 ... P-N3 15 Q-R3 Q-Bl?!

A critical moment! It is not easy to see what happens after 15...PXP, for example 16 P-K5 PxP 17 BxNP PxB 18 BxN BxB 19 Q-K6ch Q-K2! 20 QxN 0 -0 and Black has a pawn more. After 15...Pxp White can 12 B-R4 maybe play 16 B-KN5 N-R4 17 BxB j QXB 18 B-K2 with a complicated and In the game Ciocaltea-Najdorf, unclear game. Nice 1974, White played 12 P-B5, but after 12...P-K4 13 N-N3 (Or 13 16 P-B5 PxP N-B3 B-Q2 14 BxN BxB 15 P-KN4 17 PxP N(N3)-Q2 0 -0 -0 with an equal game as in Grcfe-Browne, USA 1974.1 13...B- Of course not 17... P-Q4 because of

64 ROUND FIVE

18 KR-K1. 24 Q-Q3 QxQ 25 PxQ N-N4! 18 B-K4 After 25...N(K5)-B3 26 P-Q4! 18 KR-K1 is very strong, and after Black is lost. that either the knight or bishop comes to K4 and White has the advantage. 26 P-Q4 KxN!

18 ... Q-BS Black has to sacrifice the 19 KR-K1 R-QB1 exchange, because after 26...R-N4, 20 K-Nl 27 N-B8 wins; while after 26...R-B7, 27 N-Q5 is very dangerous. Dangerous is 20 B*P because of 20...R-QNI. 27 PxR NxP 28 R-Q5 P-B3 20 ... P-N4 Both players were in time trouble and the position is not clear.

29 B-B2 N(N4)-K5 30 B-K3 P-KR4 31 RW1)-Q1 N-Q2 32 R-QB1 N(K5)-B4 33 RfBI)-Ql N-K5 34 R-QBl N(Q2)-B4 35 R-B4 R-KN1?! 36 RxNP RxP 37 P-QR3 RxRP 38 BxN NxB 39 R-N6 N-K5 40 RxRP K-Q2 21 K-Rl 41 R-Ql P-R5 42 R-R4 N-Q7 Better is 21 B-Q3, with the idea of 43 R.R7ch K-B3 22 N-K4. Black's central pawns are 44 R-KB7 N-K5? not enough compensation for tile bad position of his king. Very interesting is 44...R-B7 45

21 .•4 P-NS RxP P-R6, and Black has good 22 N-Q5 NxB chances, because of his passed KP 23 NxB R-B4 and RP.

65 PORTOROZ/LJUBLJANA 1975

45 R-QBlch K-Q4 14 R-Kl Q-N1 46 P-R4 N-B4 15 K-Rl R-R2 47 R-Qleh K-B5 16 B-K3 K-Rl 48 RxBP N-K5 17 0-Q3 N(Q2)-B3 18 P-R3 N-Nl . If 48...P-Q4, then 49 R-B6. 19 B-Q2 N-R3 20 P-K5 P-B4 49 R.R6 P-R6 21 P-K6 N-Nl 50 R-R4 P-Q4 22 QR-N1 P-QR4 51 R-KB1 K-N6 23 N-N5 R-K2 52 P-B6 Nxp 24 N-Bl B-N2 S3 R-B3ch K-B7 25 N-K3 N(N1)-B3 54 RxN P-K5 26 R-KB1 0-01 55 R-B6ch K-N6 27 B-Kl N-K5 56 R-B3ch K*P 28 N-B3 N(K1)-B3 57 R(R4)xRp R-Q7 29 B-R4 P-R3 58 K-R2 P-Q5 30 K-R2 R-N1 59 R-QN3 Resigns 31 P-KN4 RxP

G A M E 39

White: Mariotti Black: Kamar

Benoni Defence

1 P-Q4 N-KB3 2 P-QB4 P-B4 3 P-Q5 P K3 4 N-QB3 PxP 5 pxp P-Q3 6 P-K4 P-KN3 7 B-Q3 B-N2 32 Pxp Pxp 8 KN-K2 0 -0 33 NxP NxN 9 0 -0 P N3 34 PxN R(K3)-K1 10 P-B4 QN-Q2 35 R-Nl R(K1)-B1 11 N-N3 P-QR3 36 NxB RxN 12 P-QR4 Q-B2 37 RxR KxR 13 BB4 N-Kl 38 R-Nlch Resigns

66 ROUND FIVE

GAME 40 9 N-K5 P-K3 10 B-N5 P-KR3 While: Ribli 11 NxN PxN Black: GHgoric 12 B-B4 N-R4 13 B-K3 N-B3 Grunteld Defence 14 P-KR3 N-Q2 IS G-Q2 K-R2 1 N-KB3 N-KB3 lb QR-B1 N-N3 2 P-B4 P-KN3 17 P-N3 P-QR4 3 P-KN3 B-N2 18 N-QI B-N2 4 B-N2 P-B3 19 N-N2 P-RS 5 0 -0 0 -0 20 Q-N4 PxP 6 P-Q4 P-Q4 21 PxP R-R2 7 PxP PxP 22 N-Q3 N-Q2 8 N-B3 N-B3 23 Drawn

6? PORTOROZ/LJUBLJANA 1975

ROUND SIX

June 8th

White Black Opening Result Moves 41 Garcia (2) Gligoric (3§) Ruy Lopez 0-1 24 42 Karnar (i) Ribli (3) English Opening H 28 43 Portisch (lji} Mariotti (3j) Dutch Defence 1-0 40 44 Osterman (i) Planinc (2) Owen’s Defence H 37 45 Parma (2$) Velimirovic (4) Sicilian Defence H 14 46 Furman (3$) Musil (1$) Queen’s Gambit Dec . 1-0 59 47 Baric (1|) Hort (3) Sicilian Defence 0-1 62 48 Ljubojevic (3£) Karpov (4) Ponziani Opening H 20

Everyone's attention was drawn to the game Ljubojevic-Karpov, where White played a very bizarre opening. Later Ljubojevic attacked on the K-side instead of plating for the bishop pair and the better pawn structure on the Q-side. Karpov defended with the only moves (13...P-K.R3 and 14...N-Q4) and when the queens had been exchanged a draw was agreed in a position where White had no advantage at all. Even if the game was short it was still very1 interesting. Furman did not get much out of the opening against Musil, but Black blundered in time trouble and after the adjournment Black's struggle was hopeless. Portisch played well against Mariotti. who was punished for the positional faults and defects Black suffers in the “Stonewall". Garcia was punished for his strange handling of GJigoric’s Exchange Variation of the Ruy Lopez. Gligoric easily mounted a strong attack on the K-side and his last move 24...N-K8 must have pleased Gligoric himself, as well as the spectators. Parma continued his series of draws and even with the white pieces he did not dare to try' anything against Velimirovic. Karnar and Osterman played surprisingly well against Ribli and Pianino. Osterman was even near to beating Planinc. who was glad to save the game, and Ribli did not like the look of Karnar*s blockade and offered a draw before it became too late. The game Barlc-Hort was very boring for Black. White was much better and Hort got into time trouble. Interestingly. White lost his orientation and the game was adjourned in a queen endgame that was better for Black. Hort played much better in the second session and alter 43...Q-Q4 he even had a decisive advantage.

68 ROUND SIX

GAME4 1 24 ... N-K81 White: Garcia 25 Resigns Black: Gligorie Ruv Lopez 1 P-K4 P-K4 2 N-KB3 N-0B3 GAME 42 3 R-N3 P-QR3 4 B*N QPxB White: Karnar 5 0 -0 B-Q3 Black: Ribii 6 P-B3 B-KN5 7 P-Q4 P-B3 English Opening 8 P-KR3 B-R4 9 PxP? PxP 1 N-KB3 P-KN3 10 Q-N3? BxN 2 P-B4 B-N2 11 PxB N-K2 3 N-B3 P-QB4 12 B-K3 0 0 2 4 P-KN3 N-QB3 13 KR2 N-N3 5 B-N2 P-K4 14 R-Nl 0 -0 -0 15 R-N3 B-K2 16 N-R3 B-R5 17 R-N4 KR-B1 18 K-N2 R-B3 19 N-B4 P-KR4 20 NxP NxN 21 RxB R-N3ch 22 K-Rl NxP 23 RxP 0-06 24 R-KB5

Karnar

69 PO RTOROZ/ UU BU AN A 1975

6 0 -0 KN-K2 GAME 43 7 P-Q3 0 -0 8 P-QR3 P-Q3 White: Portisch 9 R-Nl P-QR4 Black: Mariotti 10 N-Kl B-K3 11 P-R3 P-Q4 Dutch Defence 12 P-N3 P-B4 13 B-N5 B-B3 1 P-Q4 P-K3 14 BxB RxB 2 P-QB4 P-KB4 15 P-K4 P-Q5 3 P-KN3 N-KB3 16 N-Q5 R-B2 4 B-N2 B-K2 17 P-B4 Q-Q3 5 N-KB3 0 -0 18 R-N2 QR-JKB1 6 0 -0 P-Q4 19 R(N2>-KB2 K-N2 7 Q-B2 P-B3 -20 Q-K2 P-R3 8 QN-Q2 P-QR4 9 N-K5 QN-Q2 10 N-03 B-Q3 11 N-B3 Q-K2 12 N{B3)-KS B-Nl 13 B-B4 NxN 14 BxN BxB 15 PxB N-Q2 16 KR-B1 P-0N3 17 PxP BPxP 18 Q-B6 B-R3 19 N-B4 QR-K1

21 N-KB3 PxKP 22 QPxP N-KN1 23 N-Kl N-B3 24 N-Q3 N-R4 25 0*B3 N-B3 26 Q-K2 N-Q2 27 K-Rl P-N3 20 QxKPch Q*Q 28 K-Nl Drawn 21 NxQ RxN

70 ROUND SIX

22 BxP R-Kl 11 Nxp R-Kl 23 R-B6 K-B2 12 B-N2 B-KB1 24 P-B4 BxP 13 N-B5 P-N3 25 QRQB1 R-K2 14 N-N3 B-N2 26 R-Q6 N-B1 15 P-B4 P-KR4 27 R-B8 K-N3 16 0 -0 3 P-R5 28 R(Q6)-Q8 P-N4 17 N-Bl N-R4 29 RxN R-N3 18 Q-B3 Q-B3 30 R-QN8 RxR 19 P-K5 QxBP 31 RxR R-QB2 20 QxB QxB 32 R*N6ch K-R4 21 R-K4 Q-K3 33 R-QB6 R-Q2 22 PxP N-K4 34 R-Q6 R-QB2 23 PxP P-R6 35 B-B6 P-N4 36 K-B2 pxp 37 KxB PxP 38 PxP K-N5 39 P-K6 KxP 40 R-Q3ch Resigns

GAME 44

White: Ostcrman 24 QR-K1 PxP Black: Planinc 2S N-Q2 P-B4 26 R(K4)-K3 P-B5 Owen’s Defence 27 R-K4 P-B6 28 Q-QS QxQ 1 P-K4 P-QN3 29 NxQ R-KB1 2 P-Q4 B-N2 30 BxN P-B7ch 3 N-QB3 P-K3 31 KxP PxR=Q 4 P-0R3 P-Q3 32 RxQ BxB 5 N-B3 N-KB3 33 RxB N-B5eh 6 B-Q3 QN-Q2 34 K-N3 NxN 7 0 -0 B-K2 35 RxN QR-B1 8 R-Kl P-K4 36 R-Q7 R-B2 9 B-QB4 0 -0 37 R-Q8ch R-Bl 10 P-0N4 PxP 38 Drawn

71 PORTOROZ/LJUBLJANA 1975

GAME 45 12 Q-N3 P-B3 13 KR-Kl B-Bl ’VS''hiie: Parma 14 0-R4 P-QR4 Black: Velimirovic 15 B-Q3 B-N5 16 N-Q2 0-N5 Sicilian Defence 17 Q-B2 R-R2 18 QR-B1 R-K2 1 P-K4 P-0B4 19 P-KR3 B-Bl 2 N-KB3 N-QB3 20 N-B3 RfK2)-Kl 3 B-N5 P-KN3 21 P-R3 Q-03 4 0 - 0 B-N2 22 P-K4 pxp 5 R-Kl N-B3 23 Nxp O-Qi 6 P-B3 0 -0 24 NxBch QxN 7 P-KR3 P-QR3 25 N-K5 R-Ql 8 BxN NPxB 26 0-B3 B-K3 9 P-0'1 PxP 27 R-K3 R-Q3 to PxP P-Q4 28 R-B3 Q-R5 11 P-K5 N-K5 29 B-B4 N-Q2 12 N-B3 B-B4 30 N*N BxN 13 N-KR4 B-K3 31 Q-N3 OxOP 14 N-B3 Drawn 32 BxPdi K-Rl 33 R-Kl R-B3 34 R-Ql

GAME 46

White: Furman Black: Musi!

Queen’s Gambit Declined

1 P-Q4 N-KB3 2 P-QB4 P-K3 3 N-KB3 P-Q4 4 N-B3 B-K2 5 B-N5 0 -0 6 P-K3 P-KR3 7 B-R4 P-QN3

8 B-K2 B-N2 34 . .. RxR 9 BxN B*B 35 QxR QxRch 10 PxP pxp 36 0 X0 RxB 11 0 -0 0-K2 37 Q-N3 R-B4 ROUND SIX

38 Q*P R-Q4 49 Q-N6 R-QN4 39 P-QN4 pxp 50 Q-B7 R-KB4 40 P-QR4 K-R2 51 0-R7 P-B4 41 Q*NP B-B4 52 0-07 P-B5 42 PR 5 R-OSch 53 P-R6 Rxp 43 K-R2 B-Q6 54 0-N7 P-B6 44 0-B3 B-N4 55 P-R7 P-B7 45 Q-B5 R-Q4 56 0 0 5 B-B4 46 0-B3 B-Q6 57 P-R8=Q P-B8=0 47 Q-R1 B-R3 58 Q(R8)-KN8eh K-N3 48 Q-QNleh B-Q6 59 0(Q5)-B7ch Resigns

A view of the playing area.

73 PO RT OROZ/LJU BLJ A N A 1975

GAME 47 37 P-B5 Q-N3 38 P-N3 0-05 White: Baric 39 0-B4 K-N2 Black: Hort 40 Q-N3ch K-Bl Sicilian Defence 41 Q-B4 K-Kl 42 Q-B3 0-07 1 P-K4 P-QB4 43 P-K5 0-04 2 N-KB3 N-0B3 44 Q-R5ch K-Ql 3 B-N5 P-KN3 45 PxP 4 0 -0 B-N2 5 P-B3 P-QR3 6 BxN QPxB 7 P-Q3 N-B3 8 Q-K2 P-R3 9 B-B4 N-Q2 10 P-Q4 pxp 11 PxP P-KN4 12 B-K3 N-B3 13 N-B3 BN5 14 KR-Q1 0 -0 15 P-KR3 B-R4 16 P-Q5 Q-Bl 17 QR-B1 K-Rl

18 B-Q4 P-N5 45 ... Q-R8ch 19 PxNP QxP 46 K-N4 Q-N7ch 20 PxP PxP 47 K-B4 QxPch 21 0-K3 Q-K3 48 K-K4 pxp 22 N-K2 BxN 49 QxP 0-B7ch 23 P*B R-KN1 50 K-Q4 QxBP 24 K-R2 N-R2 51 Q-B8eh K-B2 25 N-B4 Q-Bl 52 P-R4 Q-K4ch 26 N-R3 BxB 53 K-B4 P-R4 27 QxBch P-B3 54 Q-QR8 P-KB4 28 R-KN1 Q-B2ch 55 Q-R7ch K-Ql 29 P-B4 N-N4 56 0-KB7 P-B5 30 Q-K3 NxN 57 0-B8ch K-B2 31 KxN RxR 58 Q-B7ch K-N3 32 RxR R-KN1 59 QN6 P-B6 33 RxRch KxR 60 0-KNlch K-N2 34 Q-KN3ch K-Bl 61 0-N4 Q-04ch 35 0-R4 K-N2 62 K-B3 0-B2 36 0-N3ch K-Bl 63 Resigns

74 ROUND SIX

GAME 48 Black is faced with a serious dilemma. He has little choice over White: Ljubojevic where to put the queen—Q2 or Q3. Black: Karpov Each retreat is linked with a separate scheme of development. On Q3 with Ponziani Opening free development for the white squared bishop, but KB2 is left unguarded. On Q2 with the follow­ Notes by Karpov up . . .B-Q3, while safeguarding KB2 and continuing . . .N-K2 to keep an 1 P-K4 P-K4 eye on the weak QBP, 2 N-KB3 N-QB3 7 ... 0*02 Although Ljubojevic has played a 8 P-Q3 PxP great deal recently, he rarely tries the 9 0 -0 B-Q3 Ruy Lopez. It looks as if he did not 10 N-Q2 want to try his arm in this complicated but deeply studied The QP will not run away. The opening and so he comes up with main thing is development. something that is off the beaten track. 10 ... N-K2 11 N-K4 0 -0 3 P-B3 P-Q4?! 12 R-Ql R-Kl

A dubious experiment. 3...N-B3 is simpler, of course.

4 Q-R4

This is stronger than 4 B-NS PxP 5 Nxp Q-Q4 6Q-R4 KN-K2.

4 ... PxP

Black has no compensation in the Line 4...B-Q2 5 Pxp N-Q5 6 Q-Ql NxNch 7 QxN N-B3 8 P-B4 with a clear advantage for White. Black’s position is not an easy one. 5 NxP Q.Q4 White can, if he wishes, exchange on 6 NxN PxN Q6 and use his two bishops to exert 7 B.B4 pressure on the weak 0-side pawns.

75 PO RTO ROZ/U U BLJ A N A 1975

Hence Black has to keep a compact The only way. Black would get a formation with his pieces and starts rotten endgame after 15...BPxB 16 by taking the open file. QxQ BxQ 17 NxB PxN 18 B-K3.

13 B-KNS 16 K'xB QxB 17 N*B6ch This meets with an interesting rejoinder. The simple 13 B*QP If 17 N-N3 Black can simply play would leave White a positional 17...PXB 18 Q-R4 R-K3. 17 R-Kl is advantage, but White wants to met by 17...B-B4 (But not 17...Q- achieve more and as a result. . . KR4ch?? 18 K-N1 QxB 19 N-B6ch and 20 RxRch winning.) 18 N-N3 13 ... P-KR3! RxR 19 RxR pxB 20 NxB QxN 21 An inconspicuous move that also QxBPR-Ql. looks impossible since the enemy knight is ready to go to KB6 forking. 17 ... PxN 18 Q-R4 14 BxRP White's idea is simple. He intends Why not? He would hardly want to an attack dow-n the KR-fiie by K-N3, go back home, and after 14 BxN the R-Rl, B-Q4 etc., but Black matches worst would be over for Black. him move by move in building up a safe defence. 14 ... N-Q4 18 ... B-B4 Obviously not falling into the 19 QxP ‘trap’ 14.,.P*B 1SN-B6ch. In order to avoid getting the worse 15 BxN of it he has to exchange queens and get back the pawn. Black would get a fine game after 15 NxB QxN 16 BxN QXB(Q4) 17 B- 19 ... Q-Q3ch K3 B-B4. It would be even worse for 20 QxQ Drawn White after IS NxB QxN 16 RxP B- B4, with a clear advantage to Black In the final position Black has a (but not 16...QXB?? 17 BxN PxB? IS slight advantage, but my excellent QxRch winning). standing in the tournament enabled me not to need to sweat it out in such 15 ... BxPch a position.

76 ROUND SEVEN

ROUND SEVEN

June 9th

W h ite B lack O p en in g R esu lt M oves 49 Karpov (4*) Garcia (2) Sicilian Defence 1-0 35 50 Hort (4) Ljubojevic (4) Old Indian Defence H 24 SI Musil (1£> Barle (1£) Scotch Game 0-1 30 52 Vclimirovie m Furman (4|) Ruy Lopez H 59 53 Planinc (21) Parma {3} Ruy Lopez H 18 54 Mariotti m ) Osterman (1) Hungarian Defence 1-0 29 55 Ribli (3*) Portisch (2^) English Opening H 16 56 Gligoric (4) Karnar (1) Benoni Defence 1-0 24

On the evidence of Karpov’s match with Korehnoy, Garcia did not believe that Karpov was well prepared for the Dragon variation and, as Black, he sacrificed a pawn, a line that is recommended in many books. Blit then Garcia failed to develop tire initiative. Karpov played very easily and forced Black to sacrifice the exchange incorrectly. The game finished drastically with the loss of the black queen. The derbys Planinc-Parma and Ribli-Portisch were drawn, but only after serious fighting. Gligoric heat Karnar very easily in a Bcnoni and the game is evidence in itself that Karnar should look for an opening that he understands a little more. Sometimes it is not only the king but also the queen that can be found in a stalemate position! Such was the case in Mariotti-Ostcrman: the black queen had many squares to move to but all were covered by the white rook, and knight. Osterman could not avoid material losses, but it can be a consolation to him that Wcstcrinen had the same trouble in a Hungarian Defence against Mariotti. Black probably felt that he was in Wonderland in the game Musil-Barle. White sacrificed first a pawn, later a piece, then other material and Black was left with so many pieces that he afforded himself the luxury of giving something back. An easily scored point! Vclimirovie received a firm advantage from the opening against Furman but then, mi splayed the game and gave Black the advantage. Furman then scaled the wrong move and the continuation of the adjourned game followed Vclimirovie1 s analysis. In the game Hort-Ljubojcvic both players had different strategic plans and their opinions on the opening also differed. In the final position Black stood better and Ljubojevic’s proposal of a draw was accepted by White with both ha nds.

77 PO RTOROZ/LJU BLJ AN A I97S

GAME 49 11 ... K R -B l 12 0 -0 -0 N-K4 White: Karpov 13 K -N l Black: Garcia Thus reaching the key position for Sicilian Defence the modern form of the Dragon. Apart from the text, other plans have Notes by Karpov been tried such as 13 P-R5 NxRP 14 N-Q5I? QxQcb 15 RxQ K-Bl 16 P- 1 P-K 4 P -Q B 4 N4 N-KB3 17 NxN BxN 18 RxP, and 2 N -K B 3 N -Q B 3 13 P-R5 NxRP 14 B-R6 N-Q6ch IS 3 P-Q4 pxp K-Nl Nxp 16 KxN BxB 17 QxB 4 NKp P-K N 3 RxN, 5 N -Q B 3 13 ... P-QN4!? From the point of view of theory, 5 N-QB3 and 5 P-QB4, trying for the Marocvy bind, are about equally good.

5 ... B -N 2 6 B -K 3 N -B 3 7 B -Q B 4 0-0 8 B -N 3

As is well known, this is the only : move order to reach the Rauzer ; Attack. After 8 P-B3 Q-N3 Black j provokes complications which are i good for him. The Cuban often plays this line but, to be fair, one must note that its 8 ... P-Q 3 originator is V. Korchnoy. The aim 9 P-B3 B-Q2 of the pawn sacrifice is to open lines If) Q-Q2 Q-R4 on the Q-side. Admittedly, in the 11 P -K R 4 introductory game of the line, Matulovic-Korchnoy. Sousse Inter­ This is considered to be the most zonal 196”. White got the advantage accurate move. Generally speaking by refusing the offeT and continuing in the Dragon, with castling on 14 B-R6 BxB (14...B-R1 15 N-QS Q- opposite sides. White has to aim at a QJ 16P-R5 is very strong for White.) speedy opening of the KK-file. 15 QxB RxN 16 PxR (1.6 Q-Q2 P-

78 ROUND SEVEN

N5.) 16.. Q*BP 17 N-K2Q-B4 18 N- 14 N(B3)xP! Q.R3 B4 N-B5 19 N-Q5 NxN 20 RxN N- R6eh 21 K-N2 N-B5ch 22 K-Bl 0- Black decides to keep the queens R6ch 22 K-Ql Q-N7 24 BxN PxB 25 on. However, it turns out that the co­ P-R5 Q-N8ch 26 Q -B l. ordination between Black's pieces has However, not all of this is been destroyed and he fails to drum convincing, and so more recently up an attack. It soon becomes clear White has preferred other lines. that the pressure along one open file Thus Kuzmin-S. Garcia, Hastings (the KR-file) is much more powerful 1972-74, saw the more natural con­ than the pressure exerted along two tinuation 14 N(B3)XP QxQ 15 B*Q! half-open ones (ON and OR)- Later (This recapture is more accurate on, the queen at R3 looks very much than 15 RxQ when Black has out of things and slows down Black’s 15.. .QR-N1 16P-R4 I16NxRP R-B2 advance on the O-side. This induces is good for Black, while 16 N-B3 P- the thought that 14...Q-N3 could be QR4! gives Black nasty threats e.g. better. However, after 15 N-B3 17.. .P-R5 18 Nxp BxN 19 BxB N-B5, (White should hardly consider lines as well as 17...RxN 18 PxR P-R5, 16 such as 15 NxRP QxN(R2) 16 N-B5 N-R3 is no good because of 16...P- or 15 N-B5 QXN 16 NxKPch with ex­ QR4 17 P-B3 P-R5 18 B-Ql RxBP.l changes.) 15...N-B5 16 BxN RxB 17 16.. .P-OR3 17 N-R3. The resulting N-B5, Black will hardly surmount position gives Black many chances the crisis e.g. l?...NxP 18 PxN BxN for his pawn. He must merely avoid 19 OxB! RxQ 20 NxKPch (20 BxQ the temptation of 17...BxP 18 BxB PxN 21 PxR PxB 22 PxP BxP R-B6 19 B-B4! RxN 20 B-QN3 R-R4 produces an ending in which it is 21 BxN. The other knight retreat, 17 hard to make much of the exchange.) N-B3. allows Black to get the pawn 20.. .K-B1 21 BxQ, and no matter back by 17...N-B5 18 BxN [18 R-Q3 where the rook retreats it is still in NxB 19 RxN N-N5 20 PxN BxN,] trouble, e.g. 21 ...R-KN622 B-B7! or 18.. 2.xB.>. The Kuzmin-S. Garda 21.. .R-B5 22N-Q5! game continued 15...N-B5 (Here 15.. .QR-N1 16 N-B3 P-QR4 lacks its previous strength.) 16 N-B3 (More 15 N-B3 N-B5 accurate than 16 BxN RxB 17 P-QN3 16 Q-Q3 QR-N1 R-B4 18 N-B3 N-N5 19 PxN BxN with active play for Black.) Preparing 17...Q-N2 and hurrying 16.. .NxKP (The forcing lines arising to get out of the diagonal pin, but from 16...N-N5 17 PxN or 17 N-QS White is quick to rule this out. favour White.) 17 NxN BxN 18 B-N5! B-K4 19 BxP NxP 20 RxP! and White had a marked advantage. 17 B-Bl!

79 POKTOROZ/UUBLJANA 1975

17 ... R-N5 18 P -R 5!

This is a serious reminder to Black about the safety of his own king. Now the basic theatre of operations is transferred to the K-side. Note in passing that Black cannot take the pawn — 18...NXRP 19 N-Q5. Less convincing is 18 P-R3 in view of 18.. .R-N2 19 P-R5 R(N2)-B2, with some play in view of the threat of taking on QR3. A single glance at the diagram is sufficient to realize that Black cannot 18 ... Q-N2 break through on the Q-side. lacking as he does the opportunity of a com­ At last the queen has her hands bined pawn advance and finding it untied. However, it is probably too far from easy to get in .. .P-QR4-R5. late to make any difference. 18...Q- N3 is of course closer to the centre, but the point is that after 19 Pxp RPxp 20 P-R3 Black is forced to sacrifice the exchange, e.g. 20.. .NxRP 21 PxN RxN(Q5) 22 QxR QxQ 23 RxQ RxN. The significant point of this variation is that after 24 R-B4 Black has to exchange rooks, and in that case it is not hard to win the ending with the exchange up.

19 PxP RPxP 20 B -R 6 B xB

If 20...B-RJ there is the very un­ pleasant answer 21 BxN, while 21 BxN R(N5)xB 22 N-N3 is also not bad.

21 R x B K-N2 Karpov 22 R (Q 1)-R 1 Q-N3

80 ROUND SEVEN

27 Q-Ql BxR 28 P-N5 N(B3)-Q2

Moving this knight to R4 would make no difference.

29 P-R3I RxB 30 PxR N xP

23 N(Q4)-K2

The strength of this apparently modest retreat is often under­ estimated. Here i! is certainly stronger than the standard move 23 N-Q5". After 23...NxN {Not 23...Q*N because of 24 R-R7ch! K-Bl 25 R- R8ch when both 25...K-N2 26 R(K1 )-R7ch NxR 27 QxQch and 25...N-N1 26 RxNch! KxR 27 NxPch 31 N-B4! K-Bl 28 QxQ N-R6ch 29 P*N RxQ 30 NxR BxN 31 R-R8ch are hopeless An elegant way of finishing off the for Black.) 24 R-R?ch K-NI 25 R- game. There is no satisfactory de­ R8ch K-N2 26 K(R1)-R7ch K.-B3 fence to the threats of N*Q5cli and 27 I’xN N-Q7ch, the position is QxN. rather unclear. 31 ... Q-B7 23 ... P-K3 32 NxNPch! 24 P-N4 K-Bl The final blow, which White had Black tries to run away, but the to foresee long before going in for the white pieces catch up with him in the whole tactical operation. centre.

32 ... P*N 25 R-R8ch K-K2 33 R -R 7ch K -Q l 26 RxR N-K4 34 Q xP Q -Q 5

81 PORTOROZ/LJUBUANA 1975

35 Q-K7ch Resigns GAME 51

After 35...K-B2 he loses the queen White: Musii lo .26 N-NSeh. Black: Bsrle It would seem that this is an im­ portant game for the theory of the Dragon Variation. Scotch Opening

Notes by Baric

GAME 50 1 P-K4 P-K4 White: Hort 2 N-KB3 N-QB3 Black: Ljubojevic 3 P -0 4 PxP 4 N xP Q -R 5

Old Indian Defence This was a favourite variation of 1 P -Q 4 N -K B 3 Steinilz. The early attack with the 2 P -Q B 4 P-K 3 queen seems dubious, but White has 3 N -K B 3 P-B4 no clear way to an advantage. 4 P-K 3 B -K 2 5 N -B 3 0 - 0 5 B -K 2 6 B -Q 3 P -Q N 3 7 0 - 0 B -N 2 8 P-Q 5 p x p More usual is 5 N-N5 B-N5ch, and 9 PxP P-Q 3 now a serious possibility is (> QN-B3 10 P-K 4 Q N -Q 2 QxKPch 7 B-K3. This is perhaps 11 P -K R 3 P -Q R 3 White's best continuation. 12 P -Q R 4 Q -B 2 13 P -Q N 3 N-K1 5 ... Q *K P 14 B-Q 2 P -N 3 6 N-N5 B-N5ch 15 B -R 6 N -N 2 7 P-B 3 16 0 - 0 2 Q R -K 1 17 Q R -K 1 B -B l If 7 QN-B3 BxNch 8 PxB K-Ql, or 18 B -Q B 4 P-B3 8 NxB Q-Q5, with good prospects for 19 Q -Q 3 Q -R 2 Black. The continuation 7 N-Q2 2 0 N -K 2 N -K 4 QxNP 8 B-B3 Q-R6 9 NxBPch K-Ql 21 N xN B PxN 10 NxR N-B3 would give Black a 2 2 P -K N 4 B-R 5 decisive attack. 23 K -N 2 R -B3 24 N -N 3 R (K 1)-B 1 7 ... B -R 4 25 D raw n 8 0-0 P-QR3

82 ROUND SEVEN

9 N(N5).R.l B-N3

Otherwise 10 N-B4 in conjunction with P-QN4 w’ould be unpleasant.

10 N-Q2

White could regain his pawn by 10 BxP, but after 10...KN-K2 11 B-Q3 Q-K.R5, Black has a good position.

10 ... Q-KR5 11 N(R3)-B4 Bark

Probably better was 11 B-B3, e.g. 11...Q-Q1 (If 11...KN-K2 12 N-K4!) 12 N(Q2)-B4! B-R2 13 R-Klch KN- K2 14 B-N5 with pressure. However, it is not easy for Black to 11 ... B-R2 evaluate his extra pawn. White 12 N-B3 Q-Ql should not play 16 Q-B2 P-R3 1? 13 B Q3 KN-K2 QR-Q1, instead he incorrectly sacri* 14 B-B4 P-Q3 fices a bishop, and Black wins easily. 15 R-Kl 0-0

16 B xR P eh ? K xB 17 N *N $eh K-NI 18 Q -R 5 B -K B 4 19 P -K N 4 B -K N 3 20 Q -R 4 0 -Q 2 21 O R -Q l P-B3 22 N -K 6 R -B 2 23 B xP PxB 24 R xP Q -B l 25 R (K 1)-Q 1 P -N 4 26 R -Q 8ch N xR 27 R xN ch Q xR 28 N xQ R xN 29 N -K 3 N-Q4 Black continues to develop and 3 0 N -B 5 N -B 5 'White has no targets for attack. 31 R esign s

83 PORTOROZ/LJUBLJANA 1975

GAME 52 16 P -Q N 4 P-B 3 17 P -Q R 4 R -B 2 White: Veliiuirovic 18 P-R 5 P -N 4 Black: Furman 19 R -R3 N -B l 20 B -B 5 Q -K l Ruy Lopez White’s plan of campaign on the Notes by Furman Q-sicle lacks justification and the following minor piece exchange 1 P-K4 P-K4 leaves him with a difficult position. 2 N-KB3 N-QB3 3 B-N5 P-QR3 4 B xN

It is surprising that Velimirovic. who has a sharp combinative style, often chooses the Exchange Variation.

4 ... Q P xB 5 0 - 0 0 -Q 3

This has received less attention than the usual 5...P-B3, but it is no worse. 21 BxN? QxB 22 R-Nl P-QB4 6 P -Q 3 N -K 2 7 Q N -Q 2 B -K 3 First of all Black rids himself of 8 N -N 5 N -N 3 the doubled pawn. 9 Q -B 3 B -K 2 10 N xB Q x N 23 PxP QxP 11 N -B 4 0 - 0 24 R-R2 Q-Q3 12 B -Q 2 Q R -Q 1 25 Q-K3 P-QB4 13 N -K 3 B -N 4 14 P -K N 3 BxN Now he prepares to advance his 15 B xB P-N 3 QBP which gives him chances of breaking up the enemy pawn White has got nothing from the structure. opening, his slightly better pawn structure being compensated for by 26 R(R2)-R1 R(B2)-Q2 the ha If-open Q-file. 27 R-KB1 Q-Q5

84 ROUNDSEVEN

28 Q xQ R xQ 48 P-Q4!

After 28..,Bl’xQ While would get 48 P-N7 R-KN7 is a win for Black some play by 29 P-KB4, and the QBP since he follows up with 49...RxP 50 could be defended along ihe second RxR P-R7 and one of the pawns gets rank. home to queen.

29 KR-Q1 P-B5 48 ... R-KN7 30 QR-Bl K-B2 31 K-Bl K-K2 Not 4S...R-R6ch 49 K-B2 32 K-K2 PxPeh threatening P-N7. 33 Fxp R-RS 34 P-B4 RxRP 35 Pxp R-R7ch 36 K-K3 PXP 37 R-B5 K-K3 38 R-JKB1 R-R6 39 R.QBOch R-Q3 40 RxRch KxR 41 R-B7 P-QR4

Black plays to get there first with his far advanced pawns instead of trying to defend on the K-side.

42 RxP P.RS 49 R-R41! 43 RxP R-N6

The first inaccuracy which renders The only move, which in a sur­ the win difficult. Black could win prising way saves the game for quickly by 43...R-R8and pushing his White. pawns. 49 ... P-N6 44 R-R7 P-R6 50 RxP P-N7 45 P-N4 P-N5 51 PxPeh K-B4 46 P-NS R-N7? 52 R-B3ch K-N5 53 R-B8 RxP 1 was too confident that the 54 R-QN8ch K-B6 position was won and my sealed move 55 K-B4 R-N8 is a decisive mistake which lets the 56 P-K6 P-N8=Q win slip. 46...R-N8 still wins. 57 RxQ RxR S8 P-K7 R-Nl 47 P-N6 RxP 59 K-K5 Drawn

85 PORTOKOZ/LJUBLJANA 1975

GAME 53 solid opening.

White: Planinc 4 P -Q 4 P-Q 3 Black: Parma 5 P -K R 3 N -B 3 6 N -B 3 0 -0 Ruy L op ez 7 0 - 0 N xK P?!

I P -K 4 P-K 4 The most usual continuation here 2 N -K B 3 N -Q B 3 is 7...PXP 8 N*P N-K4 9 B-N3 P-B3 3 B -N 5 P -B 4 with equality. 4 N -B 3 P xP 5 NxPVenice 1971. 16 Q -N 5 P-K R 3 17 Q*R4 0 * 0 4 18 N -N 4 D raw n 11 ... N xP 12 N xN 0 * N 13 R -K l 0 -Q B 4 GAME 54 Wcstcrinen played 13...Q-Q3. and White: Mariotti after 14 Q-B3 P-QB3 15 B-B4 Q-B3 Black: Osterman 16 R-K5! B-K3 17 N-K4, he had a bad position. Hungarian Defence

Notes by Mariotti 14 B-K3 Q-134?

1 P -K 4 P-K 4 Better is 14...Q-B3 15 BxP B-B3 2 N -K B 3 N -Q B 3 16 B-Q4 R-Qf 17 N-K2 B-B4 18 P- 3 B -B 4 B-K 2 QB3 B-K3. with some counter­ chances. The Hungarian Defence is not often played in tournaments, but is a 15 N-Q5 B-Q3

86 ROUND SEVEN

25 R-B4!! Resigns

There is no defence against 26 R- R4. A very amusing finish.

GAME 55

White: Rtbli Black: Portisch

English Opening

l P-QB4 P-K4 16 B-B4! 0-N3 2 N-QB3 N-KB3 17 R-K3 K-Rl 3 N-B3 N-B3 18 B*B PxB 4 P-K3 B-N5 19 Q.Q4 B-Q2 5 0-B2 0 -0 20 R-Ql KR-Ol 6 P Q3 R-Kl 21 R-KN3 Q-R3 7 B-Q2 P-03 22 R(Q1}*Q3 8 B-K2 B-KB4 9 N-K4 BxN The decisive manoeuvre: 10 P*B BxBch White 's pieces join in the attack. 11 NxB 0-K2 12 0 -0 P-0R4 22 B* B4 13 P-QN3 N-Ql 23 R(Q3)-KB3 B-N3 14 N-Nl N-K3 24 N-K3 P-B3 15 N-B3 P-B3 16 KR-01 Drawn

G A M E 5 6

White: Gligork Black: Kamar

Modem Bcnoni

Notes by Gligoric

1 P-04 N-KB3 2 P-QB4 P B4

87 PORTORQZ/LJUBLJANA 1975

3 P-05 p -ro works, but the trouble is it does not 4 N-QB3 PxP work! 5 PxP P-Q3 I have been afraid of this move in 6 P-K4 P-KN3 the past because although 1 felt that 7 N-B3 B-N2 if should be wrong 1 did not know 8 B-K2 0 -0 how to refute it. Now, when Karnar 9 0 -0 R-Kl played it, I was forced to solve this 10 N-02 N-R3 problem. White cannot play nor­ 11 P-B3 N-B2 mally with 14 N-B4 because the ex­ 12 P-QR4 N-Q2 change of pieces after 14...N-K4 15 N-K3 P-N3 and . ..B-QR3 would give 12. ..P-N3 is more usual. The text Black too much freedom. an idea ill at has been adopted by 1 al and Fischer. 14 P-B4 N-B3

13 K-Rl Heading for KN5.

1 have played (his move before, 15 P-B5! e.g. against Portisch at Manila 1974. Conceding (he square K5 for ever, 13 ... P-KR4 but that is not important any more because Black's K-side is very weak. He cannot play 15...N-N5 because his QB1-KR6 diagonal is blocked, and W'hite has the threat of PxP followed by Q-B2, N-B4 and a steady build-up. Najdorf played 15 P-R3 P-N3 16 R-R3 B-QR3 17 BxB N*B 18 N-B3 N-QN5!

15 ... PxP 16 BxP!

Now Black's KB2 is weak.

The idea of this move is to get the 16 ... R-K4 square KN5 for the knight if White plays P-B4. The move was played by If 16...PxP 17 N(Q2)xP Wiih a R, Garcia against Najdorf at Buenos fantastic attack. Aires 1964. and Najdorf lost. It is really a fantastie improvement if it 17 N-B4

88 ROUND SEVEN

White must allow Rlack to keep 19 B-B3 P-N3 the KB-file closed. 20 BxN PxB 21 Q-R5 P-B3 17 ... RxKP 22 R-R3 18 NxR NxN Now if 22...B-QR3 23 R-KN3 BxN If 18...PxN 19 B-N5. Now White’s 24 RxBeh with mate to follow. main task is to destroy the knight on K4. 22 ... N-Kl 23 R-KN3 P-R3 24 NxQP! Resigns

If 24...NxN 25 RxBch KxR 26 B-R6ch etc.

89 PORTOROZ/LJUBLJANA 1975

ROUND EIGHT

June 10th

W h ite B lack O p en in g R esult M oves 57 Garcia (2) Kamar (1} Benoni Defence 4-4 15 58 Portiseh (3) Gligoric (5j) King’s Indian Def. 1-0 50 59 Osterman (1) Ribli (4) English Opening 0-i 31 60 Pa rut a (3$) Mariotti (44) Sicilian Defence 1-0 60 61 Furman (5) Planirte (3) Queen's Indian Del. 4-4 57 62 Barle (24) Velimirovic (5) Nintzowitsch Attack 4-4 54 63 Ljubojevic (44) Musil (l|) Sicilian Defence 4-4 27 64 Karpov (54) Hort (4J) Caro-Kann Defence 4-4 44

This round brought some unexpected results to the tournament. Baric won his second game, this time against Velimirovic who could have drawn with 31...N- K4 instead of 31...B-B6?. But “Drashko" believed in his talent for combinations too much and was suddenly completely lost. Portiseh came back in his game against Gliyorie. He piayed originally and was the exchange up after the adjournment. It is interesting that everybody was convinced that Gligoric had a good game and that he must have missed some stronger continuation. Itscems that he played . . ,P-QN4too late. Ljubojevic had to be satisfied with only half a point against Musil, who surprised the public as much as Ljubojevic with his strong resistance. Ostennan as White lost a theoretically know-n position to Ribli, w’ho had a free hand to operate along the long diagonal and made good use of it. At last Parma w:on a game (against Mariotti) in a sharp variation of the Najdorf. Black equalized very easily but then started to handle the position badly and was lost even after queens had been exchanged and bishops of opposite colours were left on the board. Karpov played an important game against Hort who defended with the Caro- Kann. Hort needed too much time and failed to keep up the pressure on White's weak QP. He was lost after 32.. .R-Nl ? Furman did not have an easy task against Planinc. who can sometimes play like Alekhine. Planinc's sacrifice of the exchange was correct and gave Black the better chances, but Black then lost an important tempo in time trouble (40. ..B- Ql! would be much better than 40...B-K2?) and so Furman saved an important half point in a difficult bishop endgame.

90 ROUND EIGHT

GAME 57 played the text move before, e.g. against Uhlmann at the Leningrad While: Garcia Interzonal, 1973. Black: Kamar 7 B-K3 Benoni Defence If 7 B-B4 N-B3 8 P-Q5 P-K4 with a 1 P-Q4 N-KB3 good game for Black. 2 P-QB4 P-B4 3 P-05 P-KN3 7 ... P-K4 4 N-QB3 B-N2 5 P-K4 0 -0 7...P-B4 8 P-Q5 P-K3 9 0 -0 2 K- 6 N-B3 P-Q3 R2 is satisfactory for Black but 7 P-KR3 P-K4 Uhlmann’s line is 8 PxP Q-R4 9 B- 8 P-KN4 P-QR3 Q2! QxBP and White continued with 9 P-QR4 N-Kl P-KR3, N-B3 and R-QB1. when the 10 B-N5 P-B3 black queen is a little exposed. It B-R4 P-N3 12 B-Q3 R-R2 8 P-Q5 QN-Q2 13 Q-B2 B-R3 9 Q-Q2 N-B4 14 R-KN1 B-B5 10 P-B3J 15 B-N3 P-KN4 10 Drawn An innovation. Uhlmann wanted to keep the QI-KR5 diagonal open and played 10 B-B3. The text is more GAME 58 natural, and after an eventual P- KR4, White’s KN finds the natural White: Portisch square KR3. Black: Gligoric 10 ... N-R2 King’s Indian Defence 11 P-KR4

Notes by Gligoric Threatening 12 Bxp, which could not be played at once because of 1 P-Q4 N-KB3 ll...Q-R5ch, winning a piece. 2 PQB4 P-KN3 3 N-QB3 B-N2 11 ... P-KR4 4 P-K4 P-Q3 12 0 -0 -0 P-B4 5 BK2 0 -0 6 B-N5 P-KR3 A very committal move, but even after 12...B-Q2, intending ...N-R5, Usual is 6...P-B4, but I have White should always retain the ad-

91 PORTOROZ/LJUBLJANA 1975 vantage because of the possible break 17 ... Q-Q2 P-KN4. Also possible was 17...P-R3 13 PxP Bxp followed by ...P-QN4. but that plan would have been too slow. 13...PXP is normal, bul then 14 N- R3 leaves White with a clear 18 N-R3 Q-R5 advantage because Black's position 19 N-B2 B-B6 contains too many weaknesses. If 19...RXN 20 RxR QxRP 21 Q- N4, followed by Q-R3, and Black has no real compensation For the sacrificed material.

•20 K-Nl P-K5

The only chance.

21 R-QB1

Inhibiting ...P-QM4.

21 ... Q-Kl 14 P-KN4 Too passive. 21...P-QN4 was a Also possible is 14 B'*N P*B 15 better chance, although White's P-KN4 position would still be superior.

14 ... PxP 22 P-N5! 15 PxP N-K5 16 NxN BxN Keeping my knight out of play and 17 R-R2 preparing for a leter P-R5. The text also frees the square KN4 for White’s Now everything looks nice lor me knight. because I ant well developed. But in fact there is something wrong with 22 ... Q-K4 Black's position because the KNP is 23 N-N4 weak and White's KNP and KRP are mobile and ready to increase the From now on all 1 can do is to pressure on the k-side. In contrast, prolong the resistance. my passed KP can easily be blockaded. 23 ... Q-B4

92 ROUND EIGHT

24 R-N1 K-Rl 44 P-B7ch K-Bl 45 PxR= Qdbl ch KxQ So that there will be no knight 46 K-B2 K-Q2 checks on K R6 or KB6. 47 K-Q2 K-Bl 48 K-K3 B-K4 25 P-R5 Pxp 49 KxP B-B6 26 RxP QR-K1 50 K-B5 Resigns 27 Q-B2 Q-N3 28 R.R4 K-Nl White wins by forcing his king to Q7, playing R-QN1 and P-QR4. Black's king goes to ...QR3 and then Now Portisch had a long think and White's king comes to QB6 followed became rather short of lime. by R-KR7 etc.

29 BxB RxB 30 Q-R2 GAME 59

White has many threats, e.g. 31 White: Osterman N-B6ch. Black: Ribli

30 ... Q-B4 English Opening 31 Q.R1 Notes by Ribli Now there is no defence to N-R6ch. 1 N-KB3 P-KN3 31 ... RxB 2 P-QB4 B-N2 32 NxR Q-B7 3 N-B3 P-QB4 33 N-Ql Q-KB4 4 P-KN3 N-QB3 34 Q-R3 0 X0 5 B-N2 P-K3! 35 RxQ R-K4 36 R(R3)»N3 P-N4 This is Fischer’s favourite move; 37 P N3 pxp it avoids excessive symmetry and 38 pxp N-Bl reduces the chances of a draw. 39 N-K3 N-Q2 40 R-KB1 R-Kl 6 0 - 0 N(iNl)-K2 41 N-N4 7 P-Q3 0 - 0 8 B-Q2 P-N3 The sealed move. 9 Q-B1?!

41 ... B-K4 Against Fischer in Belgrade 1970, 42 N-B6ch NxN Petrosian played 9 P-QR3, and after 43 PxNdis ch BxR 9...P-Q4 10 R-Nl B-N2 11 P-QN4

93 PORTOROZ/LJUBLJANA 1975

PxNP 12 RPxP PxP 13 PxP R-Bl 14 Another mistake after which P-B5 PxP 15 PxP N-R4 the American White’s position, which was already won the game. difficult, crumbles away.

9 ... P-Q4 17 ... P-B4! 10 PxP Pxp 18 N(K4)-Q2 P-KB5 11 B-R6 P-Q5! 19 N-K4 pxp 20 NxNP If 11...B-N2 then 12 BxB KxB 13 P-Q4 with belter chances for White. If 20 PxP then after ...N*K6 White’s forces are completely para­ 12 N-K4 N-Q4 lyzed; now the mistake of the move 13 P-QR3 B-N2 16 P-KR4 is obvious: had the RP been on R2 he could have captured Against the ihrcat of P-QN4. with it.

14 BxB KxB 20 ... N-B5 15 R-Kl R-Kl 21 Q-Q2

Perhaps best is 21 B-Rl N-K4, leading to a draw.

21 ... NxB 22 K*N N-K4 23 R-R1 BxNch 24 PxB Q-B3

With this move the game is ' really over.

■ 25 P-B4 Q-B3ch 26 K-R3 Q-K3ch 27 P-B5

16 P-KR4? If 27 K.-N2 then 27...Q-Q4ch 28 K-R3 N-B6 29 Q-Ql R-KB1 30 P- White realizes he cannot do much B5 RxP 31 NxR QxNch, and Black’s oil QN4 so he decides to attack on the advantage crystallizes a few moves K-side. later.

16 ... P-KR3 27 ... Pxp 17 Q-B2? 28 P-B4 N-N5

94 ROUND EIGHT

29 R(QR1)-K1 N-K6 Because he is a pawn down and is 30 R(R1)-N1 K-R2 faced with various threats (such as 31 N-R5 R-KN1 ...R-N5 and then. ...R(R])-KN1 fol­ 32 Resigns lowed by ...Q-N3) against which he is defenceless.

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GAME 60 6 B-KN5 P-K3 7 P-B4 B-K2 White: Parma 8 0-B3 P-R3 Blaek: Mariotti Mariotti did not wish to play Sicilian Defence 8...Q-B2 9 0 -0 -0 QN-Q2 10 B-Q3 P-R3 11 Q-R3, for this reason he Notes by Parma plays 8...P-R3 immediately.

1 P K4 P-0B4 9 B-R4 Q B2 2 N-KB3 P 03 10 0 -0 -0 QN-Q2 3 N-B3 P-QR3 11 B-Q3 4 P-04 PxP 5 Nxp N-KB3 White has now the possibility' to

95 PORTOROZ/LJUBLJANA 1975 play 11 B-K.2 P-QN4 12 BxN NxB 13 17 PxP NxP P-K5 B-N2 14 PxN BxQ 15 BxB BxP 18 B-K3 0 -0 -0 16 BXR P-Q4 17 BxP BxN 18 R*R 19 R-R5 NfN4|xN PxB. but in this position White has no advantage. Also, after 19...P-B3 20 NxN(N5) PxN 21 R-R7, White has an ad­ 11 ... P-KN4 vantage.

11.. .P-QN4 is not correct because 20 PxN R-N6 of 12 P-K5 B-N2 13 N*KP PxN 14 21 P-B4 NxBch PxN BxQ L5 B-N6ch K-R1 16 PxBch 22 PxN?! K-Nl 17 P^B, and White will have a 22 RxN is objectively better, be­ rook and two pieces for the queen. cause Black cannot do very much on 12 PxP N-K4 the open N-filc. 13 Q-K2 N-R2 22 — P-Q4! 23 K-Nl B-QB3?! 13.. .N(B3)-N5 is interesting. The game Ljnbojcvie-Bukic. Yugoslavia Interesting was 23...PxP 24 NxP! 1975, went 14 N-R3 PxP 15 B-N3 (Not R(N6)-N1 25 Q-KB2 with a com- 15 BxNP because of 15...BxB 16 licated game and chances for both NxB Q-B4!) 15...B-Q2 16 P-KR3 sides. Black has two bishops, White NxN 17 PxN(N4)! N-R5 18 P-K5 P- has control of the dark squares and Q4 19 R-R3! (threat NxP) 19...B- threatens B-N6. QR3 20 Q-Bl R-KB1 21 N-K2; White has a small but lasting 24 PxP Pxp advantage. 25 B-041 Q-Q2 26 R-QBl K-Nl 14 N-B3 PxP 27 B-B2 R-N7?! 15 B-B2 B-Q21?

In the game Hurt-BoboIsov, Wijk aan Zee 1971, Black played 15...N- Rl. and after 16 R-K3 R-KNl 17 NxN PxN 18 Q-B2! White had control on both sides of the board (QN6 and KB7).

16 P-KR41? R-KNl

If 16...PxP then attcr 17 BxKRP Black lias difficulties on the KR-file.

96 ROUND EIGHT

2$ Q-K5ch? White has to keep the queens on. because in the endgame Black has White could win the exchange by good drawing chances, so better was 28 B-R?ch KxB 29 QxR P-Q5 30 Q- 31 Q-Q4. KB2. 31 ... KxQ 32 B-Q4 B-N5 28 ... K-Rl 33 R-B2 R-N6 29 0-04 P-N3! 34 R-Q2 BxN 33 PxB R-Kl If 29...P-N4, then 30 NxQP. 36 K-N2 K-B2 37 R-R7 R-K2 30 QxNP Q-N2 38 B-B6 R-Q2 31 QxQch?! 39 B-KSch K-N3

Bruno Parma — Undefeated!

97 PORTOROZ/LJUBLJANA 197S

58 K-B3 P-R4 59 R-N5 P-RS 60 B-B7dis ch Resigns

GAME 61

White: Furman Black: Planinc

Queen’s Indian Defence

Notes by Furman 40 R-R6 R-N3? 1 P Q4 N-KB3 On the last move belore the time 2 P-QB4 P-QN3 control Black makes a mistake, 3 N-QB3 B-N2 losing a second pawn. After 40. ..K- 4 B-N5 P-K3 N2 White has only slight winning 5 N-B3 B-K2 chances. 6 PK3 P-B4 7 pxp pxp 41 RxR PxR 8 B-Q3 0 -0 42 R-N2 P-QS 9 0 -0 P-Q3 43 RxP PxPch 44 KxP K-B4 Black could also play 9...P-Q4, 45 B-Q4ch K-Q4 bur Planinc decides against having Of course not 4S...RxB because of hanging pawns and merely concerns 46 R*Bch. himself for the moment with completing his development. 46 R-N5eh K-K3 47 R-QR5 B-N2 10 Q-K2 QN-Q2 48 P-BSch K-Q3 11 KR-Q1 R-Nl 49 B-K5ch K-B3 12 P-QN3 R-Kl 50 R-R4 R-KB2 13 QR-B1 B-B3 51 P-B6 K-Q4 14 B-B2 R-N3 52 R-R5ch K-K3 15 P-KR3 Q-Rl 53 P-Q4 R-R2 16 P-K4 54 R-R4 R-R8 55 R-N4 R-R6eh Black has been building up with 56 K-Q2 R-R2 ...P-Q4 in mind, so White rules it 57 R-N6ch K-B4 out.

98 ROUND EIGHT

16 ... P-KR3 22 PxN BxP 23 Q-Q3 P-Q5 trans­ 17 B-B4 P-Q41? poses to the game.

After all, he gels this in. ll looks 22 ... P-Q5 risky, but the Yugoslav Grandmaster 23 PxN BxP has calculated the resulting compli­ 24 N-QR4 BxN(B6) cations very well. 25 NxR PxN 26 R-Kl B-R8 18 P-K5 N-R4 19 P*P PxP Black has got serious threats in reium for the exchange. After L9...NxB 20 Q-K4 White would win back the piece with the 27 P-B3 R-K6! better game. 28 RxR PxR 29 Q-K4 20 B-R2 White has to play carefully. After White now .threatens three separate strong moves — P-K6, Q- 29 K*B QxBPch 30 K-Nl, Black is not forced to take perpetual check 03 and P-KN4. The ever inventive Pianino finds a counter to all three. but can do better by 30...B-QS with a winning attack. 20 ... N-Bl 29 BxP For the moment the first two are 30 QxQ BxQ ruled oul. 31 B-B4 B-Q5 32 R-Kl P-K7dfe ch 33 K-R2 B-KB6 34 K-N3 B-B6 35 KxB BxR 36 KxP N-K3 37 B-K3 B-RS 38 B-B5 K-Bl 39 BxN PxB 40 P-R4 B-K2

Despite being a pawn down White does not have the worse of it in view of his better pawn structure and active king. Here Planinc offered a 21 P-KN4 N-B3 draw which I turned down without 22 0-Q3 sufficient justification.

99 PORTOROZ/LJUBLJANA 1975

41 K-Q3 B-Ql theoretician as Velimirovic. Probably 42 KB4 K-B2 better is 4 P-B4. e.g. 4...P-K4 5 N-B3 43 P-N4 PxP P-KN3 6 P-N3 B-N2 7 P-Q3 KN-K2 8 44 KxP P-K4 B-N2 0 -0 9 0 -0 P-KR3 10 N-Q2. 45 K-N5 K-K3 Keene-Timman, Reykjavik 1972. 46 K-B6 P-KS 47 B-Q4 P-N3 4 ... P-K4 48 B-K3 B-N4 5 P-03 P-KN3 49 BxP P-K6 6 P-B4 B-N2 50 P-R5 P-K7 7 N-B3 KN-K2 51 B-B2 K-K4 8 BK2 0-0 52 P-R6 B-K6 9 0-0 53 B-Kl K-K5 54 K-Q6 K-B6 Worthy of attention was 9 Q-Q2 55 K-KS B-B7 followed by 10 O-O-O. 56 B-B3 K-N6 57 K-K4 P-N4 9 ... P-B4 58 Drawn 10 P-QR3 P-KR3 11 N-Q5 After 57...KXP? 58 K-B3 White would win, but Black cannot be forced to take the pawn and thereby yield the key square KB3.

GAME 62

White: Baric Black: Velimirovic

Nimznwitsch Attack

Notes bv Barle White’s pieces arc rather passively placed, and Black is threatening a K- 1 N-KB3 P-QB4 sidc attack. I thought for about half 2 P-0N3 N-QB3 an hour in this position, but could 3 B-N2 P-Q3 find no good plan. At last, I decided 4 P-K3 to offer the exchange of knights, but overlooked. -. I did not want to play a standard variation against such a good 11 ... P-K5!

100 ROUND EIGHT

12 BxB PxN 25 ... B-R4 13 BxRP PxB 14 QxP R-B2 After the game, Velimirovic said 15 B-N5 he had forgotten that his bishop must, protect his 02 square. In fact 25...B- White lias lost a piece for two R4 and 25...B-B4 are both good pawns. He still has some hope of ex­ moves. An interesting variation is ploiting the weak dark squares, but 25...B-B4 26 P-N5 N-R4 27 Q-B6 Black's postion is belter in any case. NxP 28 PxP! QxBl* 29 QxN BxR 30 R-08ch RxR 31 QxRch with a draw 15 ... Q-.B1 by perpetual check: or 28...Q-K3 29 16 N-B7 R-N1 Q-B3. with an unclear position. 17 N-N5 P-B5? 26 P-NS N-R4 This leads to a very sharp position 27 Q-JB6 NxP with approximately equal chances. Much better was 17...P-Q4! 18 B-B4 Not, of course. 27., .R-KB1 B-K.3 19 BxR QxB, with a big ad­ Q8 RXR29B-K5. vantage for Black: White would have had no passed pawns or open files for 28 R-Q7 R-Kl his rooks. 29 B-R4 PxP 18 NxQP P-B6 30 RxN RxR 19 Q-N2 R-B4 31 QxR 2(1 NxR QxN 21 B-B4 R-R1 22 B-N3 QxP 23 KR-Q1 Q-K5 24 P-N4 B-N5 25 P-R3

31 ... B-B6?

Velimirovic was in time trouble: after 31. •• N-K4! White would have

101 PORTOROZ/LJUBLJANA 1975 had to take a draw by perpetual l have decided to write about my check. game with the Yugoslav Inter­ national Master Musil because he is 32 Q-Q8ch K-B2 not a player with a very deep 33 Q-Q7ch K-Bl theoretical knowledge and I therefore 34 Q-B8ch K-B2 expected a quick kill by playing one 35 Q-B7ch K-Kl of the sharpest variations of the 36 Q-Q8eh K-B2 Sicilian Sozin. 37 Q-Q7ch K-B1 However, after only 10 moves 1 saw 38 B-B6 N-N3 that this was going to be one of the 39 0-N7ch K-Kl most difficult games of the tourna­ 40 Q-N$ch K-Q2 ment. as my opponent had played a 41 Q-B7eh K-Q3 very original 9th move which took me a long time to understand! The sealed move, After 41... 42 B-R4. White would also 1 P-K4 P-QB4 easilv. 2 N-KB3 N-QB3 3 P-Q4 Pxp 42 B-K7ch QxB 4 NxP N-B3 43 QxB P-B5 5 N-QB3 P-03 44 0-B4ch K-B4 6 B.QB4 P-K3 45 R-Nl Q-Q3 46 0-NSch 0-04 6.. .Q-N3 is also very playable 47 Q-K7ch Q-Q3 48 QxP P-B6 7 B-K3 P-QR3 49 R-QBl N-R5 8 Q-K2 50 QxRPch KxP 51 Q-QN7ch K-R4 Vclimirovic’s patent; which he 52 Q-N31 Q-B4 discovered more than 15 years ago. 53 P-K4 P-N4 54 P-K5 Resigns 8 ... Q-B2 9 0 -0 -0

1 played this automatically, as if GAME 63 there were no difference between 8...B-K2 and 8...Q-B2! Whites Ljubojevic Black: Musil 9 ... IN-QR4 Sicilian Defence 10 B-Q3

Notes by Ljubojevic B-N3 was more playable for

102 ROUND EIGHT

White. ' 18 N-K3 R-QN1 looked dangerous because after 19 P-QN4!? BxP 20 HI ... P-QN4! NxB QxN(NS) 21 BxN Q-B6 22 B- ON5ch! White wins, but on 19 P- Black is trying to seize the QN4!? Black can p la y 19...B-K2! initiative first, so mv next moves were followed by 20...B-K3 with a clear aimed at getting eounterplay. advantage.

11 P-B4 P-N5 18 ... QxB 12 N-Nl P-K4 19 B-N5ch PxB 13 N-B5 P-N3 20 QxPch 0-B3

The point of Black’s eighth move is If 20...N-B3 then 21 N-Q6ch! and that now lie has no bishop on K2 to White wins. be attacked. 21 QxRch B-K3 14 PxP PxP 22 N*Q6ch BxN 15 B-KN5 If 22...K-K2 then 23 KR-K1! At this point I felt I had gcxxl counterplay, but it will soon be seen 23 RxB N-N6ch that White must force a draw in view 24 K-Nl of Black's strong initiative. If 24 K-Ql then 24...QxRch 25 15 ... P-N6I QxQ R-Q1 26 QxRch KxQ 27 PxN 16 N-B3 PxRP BxPch 28 K-Q2 BxN 29 R-Rl B-K3 17 NxP Q-N3! 30R-R8ch B-Bl and wins.

24 ... N-Q7ch!

If 24...RxN? then 25 PxN.

25 K-Bl N*N6ch 26 K*N1 N»Q7ch 27 KB1 N-N6ch 28 Drawn

By threefold repetition of position. Tf instead 25 RxN then Black has 25...O-O! with a winning attack in view of the vulnerability of the while 18 BxN king.

103 PORTOROZ/LJUBLJANA 1975

GAME 64

White; Karpov Black: Hort

Caro-Kann Defence

1 P-K4 P-QB3 2 P-Q4 P-Q4 3 N-Q2 pxp 4 N*P . B-B4 5 N-N3 B-N3 6 P-KR4 P-KR3 7 N-B3 N-Q2 8 P-R5 B-R2 9 B-Q3 BxB 27 ... B-B3 ltl QxB KN-B3 28 Q-B4 R-Nl 11 B-Q2 P-K3 29 Q-R4 P-R4 12 Q-K2 Q-B2 30 B-N4 NxB 13 P-B4 0 -0 -0 31 RxN R-N5 14 P-B5 R-Nl 32 R-B4 R-Nl 15 P-N4 P-KN3 33 N-Kl K-Bl 16 R-QJN1 PxP 34 N-Q3 R-N5 17 K-Bl R-N5 35 N-B5 RxQP 18 R-N3 K-Nl 36 RxR BxR 19 NXP NxN 37 NxNP KxN 20 RxN N-B3 38 Q-R7ch K-Bl 21 R-K5 B-N2 39 P-N7ch K-Q2 22 P-N5 N-Q4 40 P-N8=Qdis ch BxQ 23 P-N6 pxp 41 QxBch K-Ql 24 pxp Q-03 42 K-Nl P-B4 25 R-K4 RxR 43 Q-R4 0*04 26 QxR P-KB4 44 0-R5ch K-K2 27 Q-B2 45 Drawn

104 ROUND NINE

ROUND NINE

June 13th

White Black Opening Result Moves 65 Hort (5) Garcia <2j) Grunfeld Defence 1-0 63 66 Musil (2) Karpov (6) Sicilian Defence 0-1 44 67 Velimirovic (5) Ljubojevie (5) Sicilia n Defence H 42 68 Planinc (3J) Barle (3$) Ruy Lopez 0-1 54 69 Mariotti (4$) Furman (5$) Sicilian Defence 0-1 45 70 Ribli (5) Parma (4$) English Opening H 38 71 Gligoric (5j) Osterman (1) Queen's Gambit Acc- H 40 72 Kamar (1$) Portisch (4) Sicilian Defence 0-1 35

A special prize of a motorcycle had been announced for the best result in the second half of the tournament and the public were certainly surprised by the fighting spirit of round 9. The shortest game was Karnar-Portisch (35 moves) and White lost on time in a bad position. Even Parma could not be recognized—as Black against Ribli he successfully sacrificed the exchange and was only willing to accept a draw in an unclear position. In the Slovenian derby Planine-Barle nobody understood what was going on. Planinc seemed to have the initiative for the whole game, but after adjourning Barle managed to get dangerous central pawns to compensate for the exchange. During the second session White’s wish to win the game was not in accordance with (he objective situation on the board; White avoided the draw for so long that one of the black central pawns queened—A sad end! Hort and Garcia conducted a real trench war. After 60 P-N3! Black was in a classical "zugzwang” position and resigned after move 63. Musil did not want a trench war with Karpov and preferrred to sacrifice two pieces for a rook and two pawns. What use was it if two and a half hours was too short, for him and, in time trouble, everything went wrong? Velimirovic and Ljubojevie were settling the bills in a Sicilian, where after the strange move 7 Q-JK.2? Black had a very good game. In the 1975 Yugoslav Championship Velimirovic had beaten Ljubojevie, who now had all the chances for revenge. After the incorrect 23...PxP? (23...P-B5! was better) it was White who refused a draw. Finally, instead of adjourning, a draw was agreed.

105 PORTOROZ/LJUBLJANA 1975

GAME 65 36 N-B3 Q-B2 ,37 B-R3 R-KB3 While: Hort 38 N-N5 RxReh Black: Garda 39 QxR 0-N3 40 Q-Kl N-N5 Grunfeld Defence 41 R-B3 N-B3 42 R-Bl B-QBI 1 P-Q4 N-KB3 43 B-K2 B-Q2 2 P-0B4 P-KN3 44 Q-B2 QXQ 3 N-QB3 P-Q4 45 RxQ B-QB1 4 PxP NxP 46 B-Q6 P-R5 5 P-K4 NxN 47 K-Nl B-Q2 6 PxN B-N2 48 K-Bl B-QBI 7 B-QB4 0 -0 49 K-Kl B-Q2 8 N-K2 P-QB4 50 K-Q2 R-R1 9 0 -0 N-B3 10 B-K3 0-B2 11 R-Bl R-Ql 12 B-B4 0-02 13 P-Q5 N-R4 14 B-03 PQN4 15 R-Nl P-QR3 16 Q-Bl P-K4 17 B-N3 P-B5 18 B-B2 0-R2 19 K-Rl BQ2 20 P-B4 P-B3 21 N-Nl 0-B2 22 P-KR4 N-N2 51 BxKP NxKPch 23 PxP PxP 52 NxN BxB 24 Q-N5 R-Kl 53 N-B6ch BxN 25 N-B3 0-Q1 54 RxB K-N2 26 Q-K3 N-Q3 55 R-N6 R-KB1 27 R-B2 N-B2 56 P-R3 R-B3 28 R(N1)-KB1 B-R3 57 R-N7 R-Q3 29 Q-Kl B-N2 58 B-B3 K-B3 30 B-Ql P-KR4 59 K-K3 K-K4 31 N-R2 N-Q3 60 P-N3 B-N5 32 R-B3 P-R4 61 Rxp BxB 33 B-KB2 R-R3 62 KxB R-KR3

106 ROUNDNINE

GAME 66 (15...NXP 16 N-Q5, or 15...QxP 16 B-R5.) 16 N-Q5 NxN 17 PxN Qxp 18 White: Musil BxKP Q-K2, and we get a con­ Black: Karpov firmation of the old rule that in the opening the complications favour the Sicilian Defence side with better development.

Notes by Karpov- 5 ... N-KB3

1 P-K4 P-QB4 There are also some supporters of 2 N-KB3 P-K3 the variation 5...N-QB3 6 NxN 3 P-04 Pxp QPxN 7 0 -0 P-K4 or 7 P-KB4! P-K4 4 NxP P-QR3 8 P-B5, but it is a line that lacks S B-Q3 sharpness and so has few prospects from the point of view of playing for a Compared to the lines arising from win. 5 N-QB3 this move retains the option of a subsequent P-QB4. Recent 6 0 -0 P-Q3 praxis has shown that the once fashionable move 5 P-QB4 doesn't The threat of 7 P-K5 is often met look very dangerous for Black, as one by 6...Q-B2 but after 7 Q-K2 P-Q3, can see, for example, from the 1974 all we get is an insignificant trans­ USSR Championship game position of moves. Belyavsky-Vasyukov in which, after 5.. .N-KB3 6 N-QB3 Q-B2 7 P-QR3 7 Q-K2 P-KN3 N-B3 8 B-K3 P-QN3 9 R-Bl NxN 10 BxN B-Q3 11 N-R4?! R-QN1 12 B- The KB leaves (he OP to its fate. Q3 B-B5! 13 R-B2 P-K4. Black This method of playing the Paulsen is seized the initiative. fairly new. A curious point is that if Possibly White should have tried While persists with the advance 8 P- 11 P-KN3. He could hardly hope to K5 PxP and now 9 N-KB3, Black achieve much from the tactical com­ probably does best to avoid the plications arising from 12 P-B5?! B- tactical battle 9...P-K5?! 10 BxKP B5! (Not 12...PXP? 13 P-K5! Q-N2! NxB 11 QxN (White can also 14 Rxp Q- K5ch 15 B-K2 BxR 16 consider the intermediate move 11 R- NxB QxNP 17 B-KB3 with con­ Q1 since neither I1...B-Q3 12 B-B4 siderable advantage.) 13 R-B2 P- P-B4 13 BxB NxB 14 Q-K5, nor QN4 14 N-N6 P-K4 (But not 11...N-Q3 12 B-B4 Q-N3 13 N-B3 14.. .NxP 15 Q-N4, nor 14...B-N2 15 will equalize.) 11...B-N2 12 N-B3 P- B3 BxRP 16 RxB QxR 17 BxN PxB 0 -0 13 B-N5 P-B3 14 QR-Q1 Q-N3 18 QxPch K-Bl 19 P-B6 which 15 B-Bl, since here White retains a favours White.) IS B-B3 B-N2 slight advantage.

107 PORTOROZ/LJUBLJANA 1975

The correct counter is 8 P-K5 PxP 17PxPQ-N2 18 P-KSPxP 19Px?N- 9 N-KB3 N-B3 10 NxP NxN 11 QxN Q2 20 P-N5 PxP 21 PxP B-Q4 22 B- B-N2 12 N-Q2 0 -0 13 N-B3 P-N3! Q4 and Black managed to draw by and Black gets an active game. fine play. In an earlier game Djurasevic-FIcsch, Black played 8 P-QB4 B-N2 11.. .P-N3 12 P-B3, and without 9 N-QB3 going any further the openings books state that White got the better of it. A natural move, but not essential, and possibly not best. White lias a 12 P-B3 big choice: 9 P-QN3 0 -0 10 B-R3: 9 B-K3 0 - 0 10 N-Q2 Q-B2 11 QR-B1 It would seem that given Black's QN-02 12 P-QN4; 9 P-QN4 0 -0 10 plan, White, at a very early stage, B-N2 etc., etc. They are all playable, should arrange his pieces in such a but the important thing is to follow way as to play for the advance P­ them through with the appropriate ! QB5. Now, however. at the strategy. I transitional stage between opening ■ and middle game, White, despite the 9 ... 0 -0 j apparently good position he has, 10 B-K3 Q-B2 must restrict himself to prophylactic 11 QR-B1 measures. In fact continuing to play for a space advantage (and there is no other reasonable plan) would rob White of his opening advantage. For example 12 B-Nl (There is no other good way to meet 12...N-K4. since 12 P-B4 is met by 12...P-K4 while 12 P- QN3 P-N3 i3 P-B4 R-N2 allows Black to exert great pressure on the centre in view of the possibilities 14.. .P-K4 or 14...N-B4.) 12...P-N3 • (Not 12...N-K4 13 P-B4.) 13 P-B4 B- ! N2 (13...P-K4 is premature in view of ’ 14 N-Q5, but the advance is now a threat.) 14 P-QN4 (The passive 14 N- 11 ... Q.N-Q2 | N3 is met by 14...QR-B1 15 N-Q2 Q- N1 16 P-QN4 Q-Rl or 14...N-B4 15 lii the Leningrad Interzonal N-Q2 P-QR4, in both cases with a Hubner made the more forcing move good game for Black.) 14...QR-B1 11...N-B3 against me. Wc continued 15 B-Q3 P-K4! (A timely under­ 12 NxN PxN 13 P-B4 P-B4 14 KR-Q1 mining move since otherwise White B-N2 15 P-QR3 B-B3 16 P-QN4 PxP would consolidate in the centre by 16

108 ROUND NINE

N-N3.) 16 N-Q5 Q-Ql 17 PxP (Or 17 NxBPch! 18 PxN Q-KN4ch, and N-N3 PxP 18 BxBP R-K1 19 BxP Black ought to win. After the tevt NxN 20 BPxN RxR 21 NxR Bxp.) White gets a breathing space and 17.. .NxN! (17...PxP is not so clear — manages to regroup. 18 N-N3 P-QN4 19 N-B5!, or if 17.. .N(Q2)xp J8 B-N5 BxN 19 BP*B 13 Q-KB2 B-N2 RxR 20 RxR P-R3 21 BxN Q*B 22 14 KR-QI N-R4 BxP.) 18 BPxN NxP 19 BxP (Or 19 RxR QxR 20 R-Bl Q-Q2 21 BxP BxB 22 QxB Q-N5.) 19...RxR 20 BxR BxB 21 QxBQ-R5 22 0-K2 (22 R-B4 Q-K8ch 23 O-Bl QxP is clearly favourable to Black.) 22...N-N5 23 N-B3 B-Q5cli 24 K-Rl N-B7ch25 K- N1 N-R6dbl ch. and, as in the old fashioned musical comedy, it comes out to a happy and peaceful end.

12... P-N3

Deciding lo go along the lines of the Djurasevic-Flcseh game. What The cloudless unconcern which choice did I have? When you are con­ White has enjoyed thus far comes to sciously playing for a win you some­ an end in view of the threatened times have to avoid the objectively ‘below the licit’ blow to the centre strongest move in order to keep the ...P-B4. With the same idea in mind position tense and complicated. Ob­ Black could also consider 14...QR- viously 12...N-K4 would equalize K1 15 B-B1 R-K2 16 R-B2 N-Kl 17 easily as White cannot keep his R(B2)-Q2 P-B4, bishop. The pawn sacrifice 13 B-Nl is unsound. There would follow 15 B-Bl QR-BI 13.. .Qxp (After l3...NxQBP 14 N- 01 P-QN4 15 P-QN3 P-K4 16 PxN Black could also play 15...QR-K1, PxN 17 Bxp Black is under some sticking firmly to the idea of getting pressure.) 14 Q-KB2 Q-N5 (He in ...P-B4. The likely reaction would could also play 14...Q-B2 15 N-Q5 be 16 P-KN4 (Not 16 N(Q4)-N5 PxN Q-Ql 16 N-B7 R-Nl 17 N-N3 P-N3!? 17 NxP Q N1 18 RxP B-K4 19 Rx.N 18 Bxp NxKP 19 PxN N-N5 20 Q-N3 BxRPch 20 K-Rl N-N6ch 21 K*B RxB 21 QxN R-N2J 15 P-QR3 (If 15 NxRdis ch 22 B-B4 QxBeh 23 P-N3 N-N3 N-B5. while 15 N-B2 is not very Q-K3ch.) 16...N(R4)-B3 17 R-B2 R- serious — 15...QxP 16 B-Q4 N-B3.) K2 18 R(B2)-Q2 N-K1 with com­ 15.. .Q-R4 16 NxP PxN 17 B-N6 plicated play.

109 PORTOROZ/LJUBLJANA 1975

16 R-B2 N3ch K-Rl 22 Q-R4. there would be a sharp struggle with chances for While Black is busy preparing his both sides. strike from the flank White con­ centrates the fire from his heavy 18 ... P*N pieces on the QP. 19 NxP Q*N1 20 Nxp N-B4?! 16 ... KR-K1 A risky decision, playing for a win 17 R(B2)-Q2 B-Bl and giving up the exchange, in order to keep his valuable black squared Provoking White into a piece bishop. After 20...BxN 21 RxB N-K4 sacrifice. However, the consequences 22 P-QM3 (Not 22 Bx? NxQBP 23 are far from clear, so the more RxN RxR 24 R-Q8 RxR 25 RxRch careful line was 17...Q-N1 18 N-N3 QXR 26 BxO R-B8ch.) 22...R-B3 23 (If 18 N-R2 B-Bl 19 B*P NxB 20 RxR BxR 24 BxP BxP! 25 B-R7! (25 QxN P-Q4 and the weakness of the PxB loses to 25...N-N5.) 25...Q-B2 dark squares tells straight away.) 26 B-N6 the draw is clear. 18.. .R-B3 (18...B-Bl 19 B*P Bxp 20 B-R7 winning material.) when there 21 NxR(K8) RxN is the subjective snag that White can 22 P-QN4! N-R5 force a draw by 19 N-Q4 R(B3)-B1 20 N-N3 etc. Not. however, 19 N-NSI? B-KB1.

18 N(Q4)*N5l?

Perfectly logical. White tries to resolve the tension by combinative means, just at the moment when he cannot strengthen his position any further. Any dawdling here would react in Black’s favour. However, White could consider the modest 18 N(Q4)-K2, unblocking the Q-file, the QR7/KR2 diagonal and intending N- 23 P-QR3 B4. As 18...QXP 19 N-B4 Q-B2 20 N*N PxN 21 Q-R4 would favour A bad slip. While was forced to White, Black would probably answer continue in enterprising stvle by 23 18.. .P-B4 19 PxP (19 P-K5 N*P 20 P-B5! Possibly he was worried about BxP Qxp 21 N-Q4 Q-N5 would 23...PxP 24 B-QN5 N-B6. but then hardly tempt White.) 19...NP*P. 25 BxR NxR 26 R*N! QXB 27 B*P! and after 20 N-B4 N(R4)-B3 21 Q- would give him clearly the better of it

110 ROUND NINE in view of the poorly placed QB. Nor 25...B-QN2 26 R-Q8 RxR 27 RxR p. docs 23. ,.Q-K4 24 B-QN5 R-Rl look N4 (Both 27...Q-B2 28 Q-R4! very convincing, since after 25 BxN threatening 29 B-R6 N-N2 30 Q-B6 RxB 26 Pxp RxNP 27 R-Q8 Black and 27...N-B4 28 BxN PxB 29 P- cannot meet the many threats. QR4 Q-B2 30 Q-Q2 are unpleasant Finally. 23...K-B1 24 Pxp BxNP 25 for Black.) 28 BxQNP NxB 29 QxN R-B2 N-B6 26 R(Qi)-Bl brings Black K-N2 30 RxB KxR 31 QxB Q-K6ch little consolation. There arc- various 32 K-Rl Q-K8, and neither side can possibilities from here, but none is avoid the repetition of moves. good enough e.g. 26...N-B5 27 P-N3 N(B6)-K7cii 28 RxN RxR 29 BxN or 24 ... Q-B2 26.. .P-K4 27 P-QR3! B-K4 28 B-Q2, or 26...Q-Q3 27 Q-Q2! or 26...R-B3 Black has finally consolidated his 27 B-04P-K4 28 RxN. position aher the combination. Al­ Black could try the piece sacrifice though we now have formal material 23.. .B-B3?! 24 P-N5 RxRP 25 PxR equality (two minor pieces for rook BxP 26 R-Q7 BxB 27 QxB N-B4. and two pawns) the minor pieces will with definite compensation for the demonstrate their superiority in what exchange. However, the simple reply follows. 1 feel that the next few moves 24 PxP BxNP 25 R-B2 destroys the are very instructive. illusions. A final line which is also in­ adequate is 23...0 K1 24 I’xp (24 B- 25 Q-Kl R-Bl QN5 B-B3 is good for Black.) 26 Q-Ql B-Kl 24.. .BxNP 25 R-B2 N-B6 26 R(Q1)- 27 Q-N3 P-R3 B1 (If 26 R-Q7 N-B3 27 R-B7 Black 28 R(B1)-Q1 has 27...N-Q8 28 Q-R4 NxB 29 Q*N R-KB1.) 26...Q-R6 27 B-Q4 N-R5 28 Once White has lost the initiative R-N l. his pieces thrash about in their own half of (he board. For Black, 23 ... B-B3! however, everything goes smoothly 24 R-Bl and he has the opportunity to strengthen his position move after Yet another mistake. It was move. already lime for White to think in terms of saving the game by taking 28 ... P-KN4 the appropriate swift action. To this 29 BB2 N-B5 end he should try 24 P-K5!? and if 30 B-N3 B-N2 24.. .Qxp then 25 P-N5 (25 BxP is 31 Q-K3 R-Rl risky in view of 25...NxB 26 Q*N B- 32 R-Bl B-K4 R5 27 R-08 B-R3 28 K-B2 QxP 29 33 B-B2 N-N3 RxRch RxR 30 Q-Q8 K-N2 and Black has a dangerous attack.) The threat of 34...B-B5 provokes a

111 l’ORTOROZ/LJ UBIJ A N A 1975 fresh weakening, after which White R6ch 45 K-K2 Q-N?ch 46 K-K3 B- has weak pawns on both wings. BSch 47 K-Q4 P-K4 mate.

34 P-N3 Q-K2 40 R-Q2 N-B6! 35 Q-N3 Q-B3 3f> K-N2 With the deadly threat of meeting 41 B-Bl by 41...B-R5 42 Q-N2 Accurate and methodical play has N(B6)-K7ch, and so forcing White to done its work. Black’s forces are very accept the sacrifice. harmoniously placed whereas White has no sign of coimterplav. Now the 41 PxN QxP lime has come for a decisive storming 42 RxN of the K-side. At the kill White has Ihe immense material advantage of rook and pawn.

42 ... QxRPch 43 K-Bl Q-R8ch 44 B-Nl B-R7 45 Resigns I ''' I After 45 B-Ol OxRch 46 K-K2 B- B5 he has no useful move. The elegant finish might lead one to the false conclusion that the win came rather easily in the same. Tn fact, however, playing all out for a win 56 ... P-R41 is always hard and involves taking | risks. This game was certainly not 37 R-Q3 P-JRS i * 38 B-K2 B-B3 ! easy. 39 K-NI N-B5!

The start of the final mating CAME 67 attack. If the sacrifice is accepted then we get a pretty finish — 40 PxN White; Vclimirovic QxP 41 (either) R-Ql QxRPch 42 K- Black: Ljubojcvic B1 0-R8ch43 B-Nl B-N6!! and there is no stopping mate. The same out­ Sicilian Defence come arises from 41 B-K3 QxRPch 42 K-Bl Q-R8ch 43 B-Nl (43 K-B2 1 P-K4 P-QB4 B-N6 mate.) 43...B-N6 44 B-Ql Q- 2 N-KB3 P-Q3

112 ROUND NINE

3 P-04 N-KB3 30 P-R 4 B -N 5 4 N-B3 PxP 31 B*P

Ruv Lopez

Notes by Baric

1 P-K4 P-K4 2 N-KB3 N-QB3 3 B-N5 P-0R3 4 B-R4 N-B3 5 0 -0 B-K2 6 R-Kl P-QN4 7 B-N3 P-Q3 8 P-B3 0 -0 9 P-KR3 N-QR4 21 . . . P-K5 10 B-B2 P-B4 22 B-QB2 B-N3 11 P-04 N-Q2 23 B-B2 PxP 12 QN -02 BPxP 24 RxP P-B5 13 pxp N-QB3 25 R-01 R{QB1)-K1 14 N-N3 P-OR4 26 R-K1 PxP 15 B-K3 N-N3 27 B-KN3 R-B4 16 B-Q3 28 BxQP RxP 29 B-B4 P-KR4 Better is the move recommended

113 PORTOROZ/LJUBLJANA 1975 by theory 16 Pxp. c.g. 16...NXP 17 Pianino, begins an attack on theQ- N(N3)-Q4 N(N3)-B5 18 B-Nl. side, where the black knights are badly placed. 16 ... N-B5 17 B-QB1 B-B3 25 ... PxP 18 P-Q5 N-N5 26 PxP B-N2 19 B-Bl B-Q2 27 B-QN5 70 N(N3>-Q2 N-N3! 27 BxN(R6) RxB 28 B*N RxB 29 After this move. White will have N-B4 seems better. problems with the development of his Q-side. 27 ... P-B4 28 BxB QxB 21 N-Nl N-R3? 29 N-B4 NxKP

The wrong plan: he should have Correctly sacrificing the exchange. played 21.. .Q-Nl, c.g. 22 N-B3 N-R5 Also possible was 29...Q-QB2, with 23 NxN PxN 24 B-Q2 R-Bl 25 B-B3 approximately equal chances. P-R6, with full equality. 30 N-N6 Q-KB2 22 B-K3 N-R5 31 NxR RxN 23 P-QN3 N(R5)-B4 32 N-Q2 N-B6 24 N(N1)-Q2 P-N3 33 Q*N3 NxQP?

Better was 24...P-R5. 33...P-K5, threatening 34...P-B5. was much better.

34 QR-Q1 NxB 35 QxQch

35 RxN was a little better.

35 ... KxQ 36 RxN P-Q4 37 N-B3 P-K5 38 N-N5eh K-B3 39 NxRPch K-K4 40 R-QB3 P-Q5 41 R-B6 P-Q6

25 P-QR4! The sealed move.

114 ROUND NINE

50 N-B3 P-K7 51 R-N5ch KK5

Planinc had only a few seconds left, and exceeded the time limit on his 55th move.

52 R-KRl N-K3 53 R-N4ch K-K6 54 P-R7 P-Q7 55 White lost on time

The ending is very double-edged: I did not analyse (he adjourned GAME 69 posilion very much, but considered it nearly equal, with White having While: Mariotti slightly the better chances. Black: Furman

42 N-N5 R-R2 Sicilian Defence

A useful waiting move. Notes by Furman

43 P-N4? 1 P-K4 P-QB4 2 N-KB3 P-K3 A waste of time. Better was 43 N- 3 P-Q4 pxp B7ch. e.g. 43...K-Q4 44 RxNP N-B4 4 Nxp P-QR3 ■ 45 RxB Nxp'46 P-R4 N-B6 47 R-Q2 5 B-Q3 N-KB3 P-R5, wiTh complicated play. 6 0 -0 P-Q3 7 N-QB3 43 ... PxP 44 P-R4 K-Q4 White would have better prospects 45 RxNP N-B4 by 7 P-QB4. After the text move 46 P-R5 P-N6 Black goes into (he Scheveningen, in 47 P-R6 PxPch? which the position of the bishop at 03 is not always favourable for Better was 47...B-Q5 and Black White wins easily. 7 N-B3 48 KxP B-QSch 8 B-K3 N-K4 49 K-N2 P-K6 9 P-KR3

115 PORTOROZ/LTUBLJANA 1975

Preparing P-B4. which if played at once would be bad because of 9...N(B3)-N5.

9 ... P-Q N 4 10 P-B4 NxU

Not 1.0...N-B5 11 BxN P*B 12 P- Z O X j T i X X 14 Q-B3 which is bad for Black.

11 P *N B-N 2 12 Q-N3 r . q n i

25 ... B-B5! I'aking the sling out of the 26 pxp RPxp threatened 13 P-QR4. 27 QxNP?

13 P-B5 P -K 4 After 27 NxNP it would be harder 14 N -B2 B-K 2 for Black lo prove the soundness of 15 B-R 7 R -R l his pawn sacrifice. 16 B-B2 0 -0 17 K H 01 27 ... QxQ 28 N*Q B-QR3! Now 17 P-QR4 would not be dan­ gerous in view of the counter 17...P- White had dearly under estimated 04. the strength of this move.

17 ... Q-Q2 29 R-R1 18 P-Q R 4 P-Q4 19 P*NI> PxN P After 29 N-B7 B*P 30 NxR BxN 20 R*R RxR Black should win the ending despite 21 B-R4 P-Q5 being the exchange down. 22 B xN BxB 23 N -NI 29 ... R-QBl 30 RxB RxN 23 NxNP B-B3 24 N(N5)-R3 B- 31 N-Q6 B-N6 QR5 is risky For White. 32 R-R l

23 ... P-N3 In view of the bad position of his 24 R-KB1 B-N4 king, White is forced into passive 25 N IN D -R 3 defence.

116 ROUND NINE

32 ... R-Q7! This is Bilek's favourite variation: the point is to play the King’s Indian The win of the QP is much more with an extra tempo. important than taking the QNP, as Black now gets a passed pawn. 6 ... P-QR4?! 7 P-QR4! 33 P-N4 RxQP 34 R-Nl R-K6 This secures an important square 35 P-N5 P-Q6 for the knight. 36 N-B4 Rxp 37 N-Q2 7 ... N-B3 8 0-0 P-K4 3? P-N6 docs not work because of 9 P-K4 P-Q3 37...RxN38 P-N7 P-K5.

37 R-K7 After 9...P-Q4 White stands better as he has a King,’s Indian position 38 N-Bl B-B7ch 39 K-R2 B-N3 with a move in hand. 40 N-N3 11-QB7 41 R-Ql P-Q7 10 N-R3 P-R3 42 N-K4 B-R4 11 N-Q2 R-Nl 43 P-N6 R-N7 12 N(Q2)-B4 B-K3 44 NxP B*N 13 P-B4 Pxp 45 P-.N7 B-BSch 14 BxP N-Kl 46 Resigns 15 Q-Q2 K-R2 16 P-N31

GAME 70 If 16 N-N5 then 16...BxN 17 PxB N-K4 and the chances are White: Ribli equal, thanks to Black’s knight on Black: Parma K4.

English Opening 16 ... N-K4 17 R(R1)-N1 P-N3 Notes by Ribli 18 N-.N5 P-N4

1 N-KB3 N-KB3 Now 18...BxN would have been 2 P-KN3 P-0B4 quite bad because after 19 NP*B 3 B-N2 P-KN3 Black’s weak QNP improves White’s 4 P-Q3 B-N2 chances. 5 P-B3 0-0 6 P-QR3 19 B-K3 JN-N5

117 PORTOROZ/LJUBUANA 1975

R i b l i It was worth considering 21 QXN P-04 22 PxP BxQP 23 R(NI)-K1 BxBch 24 KxB Q-Q4ch 25 Q-K4ch QxQch 26 RxQ, when the position favours White. 27 R(N1)-KB1 Q-Bl 21 ... N-B2 28 N-B5 BxN 22 P-Q4? 29 PxB K-B6!

Here 22 NxN QyN 23 N-B5 or Thanks to the inferior move 22 22 N-B5 would have given White a P-Q4? the QR-file is now open. clear advantage. 30 Q-Q1 B-B3! 22 ... NxN 31 B-B6 RxB! 23 PyN Pxp; 24 Pxp K-Nll Black reckons that once he elimi­ nates this bishop he is not doing He puls his king on a safer square badly even though he is the exchange and simultaneously defends his BP. down.

25 Q-03 R-Bl 32 P'xR QxPch 26 R-B2 R-B2 33 P-05

118 ROUND NINE

After 32 K-Nl there comes ...R- 16 QR.QI 0 -0 K 1 followed by ...R-K4 and ...Q-Q4, 37 Q-B5 R-B2 when White is faced with a lot of 18 P-QR4 QR-KB1 problems. 19 P-R5 Q*Q 20 PxQ N-B5 33 Q-IS4 34 P-R 4 R -K l 35 P*P PxP 36 Q -B 3 Q -B 4 37 K -R 2 R-K6 38 Q-Qi Q -N 4 39 D raw n

White cannot exploit his material advantage even after effecting the exchange of rooks by means of 39 R-B3.

GAME 71

White: Gligoric 21 P-R6 pxp Black: Osterman 22 N-K4 P-R3 23 R-Rl P-QR4 Queen’s Gambit Accepted 24 RlKD-QBl NxP 25 Rx? N-06 1 P-Q4 P-Q4 26 K-B2 P-B3 2 P-QB4 PxP 27 P-R3 R-Nl 3 P-K4 P-K4 28 P-B3 R-Q2 4 N-KB3 Pxp 29 K-Q2 K{N1 l-Ql 5 B*P N-QB3 30 R-R6 N-N5 RxR 6 0 -0 N-B3 31 K*R 7 P-K5 N-K5 32 R-R4 N-Q6 R-QB2 8 R-Kl N-B4 33 R-R6 P-K4 9 B-KN5 B-K2 34 R-R4 N-B5 JO B*B QxB 35 R-R3 N-K3 N*P NxN 36 N-06 11 NxP 12 QxN B-K3 37 R-K3 RxP N-N2 13 P-QN4 N-Q2 38 R-K8ch K-R2 14 BxB P*B 39 N-J14 Drawn J5 N-B3 N-N3 40

119 PORTOROZ/LJUBLJANA 1975

GAME 72 23 P-B3 BxB 24 QxB 0-N3 Whitt': Karnar 25 R-Kl N-B3 Black: Portisch 26 R1Q5)-Q1 KR-K1 27 N-Rl P-04 Sicilian Defence 28 N-B2 P*P

1 P-K4 P-QB4 2 N-KB3 N-0B3 3 P-Q4 pxp 4 NxP Q-B2 5 N-QB3 P-K3 6 B-K2 P-0R3 7 B-K3 N-B3 8 0 -0 R-K2 9 P-B4 P-03 10 OKI 0-0 11 Q-N3 K-Rl 12 QR-Q1 B-02 13 P-B5 N-K4 14 K-Rl P-0N4 15 P-QR3 N-B5 29 B-K2 RfBl)-Ql 16 B-Bl P-K4 30 P-ON3 N-R4 17 N-N3 B-B3 .31 P-QN4 N-B5 18 15-B3 0R-B1 32 Q-N5 R*R 19 OKI N-Q2 33 BxR Q-B7 20 R-Q3 0-01 34 P-R3 P-R3 21 N-05 BxN 35 Q-Bl R-Ql 22 RxB B-N4 and While lost on lime

120 ROUND TEN

ROUNDTEN

June 14th

White Black Opening Result Moves 73 Garcia (2j) Portisch (5) Sicilian Defence 1-0 48 74 Osterman (lj) Kamar (1$) French Defence H 13 75 Parma (5) Gligoric (6) Ruy Lopez H 22 76 Furman (63) Ribli (5$) Grunfcld Defence 0-1 62 77 Bade (4§) Mariotti (4§) King’s Gambit 1-0 20 78 Ljubojevic (5J) Pianino (3J) Ruy Lopez H 19 79 Karpov (7) Velimirovic (5J) Sicilian Defence 1-0 SO 80 Hort (6) Musil (2) Sicilian Defence H 70

This round was similar to the previous one and only one quick draw appeared among the last placed players Os term an and Karnar. Baric scored his fourth point in a row! This time it was against Mariotti who was still demoralized from his bad luck against Furman and under-estimated Baric’s counter-attack on the Q-sirie. Furman'$ good luck was out. As White against Ribli his position seemed to be the more prosperous, then Ribli sacrificed a pawn for an ending with four knights where his king was centralized. White tried to create some chances by sacrificing liis KRP, but it cost him too much time to liquidate Black's KKP. This win placed Ribli in the top group and reduced Furman's chances for first place to a minimum. Everything was working in Karpov’s favour. In this round he heat Vclimirovic in, a Dragon Variation (with the white pieces of course!) The Yugoslav Champion sacrificed a pawn and got good attacking possibilities, Karpov- defended as usual without using too much time, which turned out to be very important since Black lost clock time and a tempo by 25...B-N4? instead of 25...B-K11, which would have given him a good initiative and deprived White of the time needed to reduce the material on the board. After the adjournment Karpov. Vclimirovic and Ljubojcvie discussed this game over dinner and there were cascading waterfalls of variations and sacrificed pieces. In the morning Velimirovic announced that he had missed a forced win in the first session. What it was and whether he was looking for it the whole night is a secret, but it was the World Champion who had more time left on the clock. After this win Karpov's chances for first place were rising. PORTOROZ/LJUBLJANA 1975

GAME 73 Better H...B-N5!?, S..B-Q3!? or 8...P-Q3 9 P-B4 B-02 10 O-Kl P- White: Garcia QN4! Black: Portisch 9 P-B4 P-03 Sicilian Defence 10 Q -K l 0 - 0 11 Q-N3 K -R l Notes by Janoscvic White also stands slightly better after 11...B-Q2 12 P-K5 P*P 13 PxP NxP 14 B-KB4 B-Q3 15 QR-01 N- K1 16N-K4P-B3. 1 P-K4 P-QB4 2 N -K B3 N -Q B 3 12 K -R l B -Q 2 3 P -0 4 P xP 13 N xN ?! 4 N xP Q-B2 5 N -Q B3 P-K 3 13 QK-QI was more accurate. 6 B-K2 P-Q R 3 7 0 - 0 N-B3 13 BxN 8 B-K3 B-K2?t 14 B- Q4 Q R -Q 1

122 ROUNDTEN

15 B-Q3 R-KN1? 34 B-QBl K-Kl 35 B-N3 The lesser evil was 15...P-K4 16 PxP N-R4 17 Q-R3 PxP with some advantage for White.

16 QR-01 P-R 3 17 Q -R3 P-K 4 18 B-K 3 Q -B l 19 P-B5 P -Q N 4 20 R -B3?

20 P-R3! to stop Black’s next move.

20 ... P-N 5 21 N -Q 5 BxN 22 P*B N-K2 35 ... Q-N4??

Alter 22...P-K5, White wins with 35...K-B1. 23 B*KRP e.g. 23...PxR 24 B- KNSdis ch N-R2 25 BxB or 36 P-B4! Q-N2 23.. NPxB 24 QxPch N-K2 25 R-R3 37 B-R4ch K-Bl R-N2 26 P-B6! BxP 27 BxKP. 38 R-K2 B-N3?? 38. R-B1 was the only chance. 23 Q -R 5 P-B3 24 Q -N 4 Q -N 2 39 P-N 5! 25 Q -K4 R -N l 2 6 P -K R 4 B -Q l Now White is winning. 27 P-N 4 P -Q R 4

39 • •. B PxP 40 P*P N xP The position is now equal. 41 B*N PxB 42 Q -N 4! R -B 3 Q xP R R 3 28 R -Q 2 R -KB1 43 R xR PxR 29 R-R3 K -N l 44 Q -B6ch! 0 -B 2 30 R -N 2 R-B2 45 46 Q xQ Peh K-N2 31 K-R2 K -B l Q xK Pch K -R 2 32 B -Q 2 K -K 1?! 47 48 B-K8! R esigns 33 B -O B 4 K -B l

123 PORTOROZ/ LJUBLJANA 1975

GAMP 74 14 ' N-N3 B-KBl 15 PxKP pxp White: Osier m an 16 N-B5 Q-B2 Black: Karnar 17 N-R2 R-K3 18 Q-B3 QR-K1 French Defence 19 N-B1 p -bs 20 N(B1}-N3 N-B4 I P-K4 P-K3 21 B-N5 N(B3l-02 2 P-Q4 P-04 22 OR-01 N-N3 3 N-OB3 N-KB3 23 Drawn 4 B-KIS5 B-N5 5 P-K5 P-KR3 6 B-Q2 BxN 7 P*B N-K5 8 Q-N4 P-KN3 GAME 76 9 B-Q3 NXB 10 K*N P-QB4 White : Furman 11 N-B3 Q-B2 Black Ribli 12 Q-B4 P-B4 13 P-KR4 Drawn Grunfeld Defence

Notes by Ribli GAME 7? 1 P-Q4 N-KB3 While: Parma 2 P-QB4 P-KN3 Black: Oliguric 3 N-QB3 P-Q4 4 N-B3 B-N2 Ruy Lopez 5 Q-R4ch B-Q2 6 0-N3 pxp 1 P-K4 P-K4 7 0 XBP 0 -0 ! 2 N-KB3 N-0B3 3 B-N5 P-QR3 In the first round Garcia played 4 B-K4 N-B3 7...N-B3 against Fur nan, but after 5 0 -0 B-K2 8 B-N5 B-K3 9 Q-R4 N-Q4 10 P-K3 6 R-Kl P-0N4 P-KR3 11 B-R4 0 -0 12 B-K2 N-N3 7 B-N3 P-03 13 Q-Q1 N-R4 14 O-0 it led lo his 8 P-B3 0 -0 disach ant age. 9 P-KR3 N-Nl 10 P-04 0N-Q2 8 P-K4 N-R3 11 QN-02 B-N2 12 B-B2 P-B4 8 ... B-N5 9 B-K3 N(B3)-Q2 is also 13 N-Bl K-Kl worth considering.

124 ROUNDTEN

9 P-K5 N-Kl after 23 QxQBP R-Q3 24 Q-K4 10 B-K2 P-QB3 White has an overwhelming position. 11 0-0 N(K1)-B2 12 B-K3 P-QN4?! 22 BxB RxB 23 R-B4 R(B1)-Q1 Black trie?; 10 find counterplay at 24 K-Kl the cost of weakening his pawn on B3. This forces P-KB4 because of the threat of PxPch. 13 Q-Q3! P-B3 14 RtRI)-Bl! 24 P-KB4 25 K(K1)-QB1 He already at tacks the pawn. Seemingly Black’s position is quite 14 B-K3 bad, not only because of the weak 15 0-Q2 Q-Q2 pawn on B3, but also because of the 16 B-R H(R1>-01 6 intrusion of the white rooks. 17 B*B KxB 18 P-QN3 P-N5!? 25 ... P-B4 26 P*P

White captures with the pawn so that if Black decides to win his pawn back he will not be able to take it with a rook.

26 ... K-Q8ch 27 N-Kl Q-B3!

This prevents the advance of the pawn and assumes the initiative.

28 P-KR3 Black now controls Q4, hut hands the QB-file over to While. If 28 N-N2 then 28...P-B5 is dangerous. 19 N-QK4 B-Q4 20 Q-K3 Q-IU 28 P-B5 21 B-B4! N-K3! 29 Q-B3 QXQ 30 PxQ RxR If 21...B*N 22 QxB PxP then 31 RxR P-N4!

125 PORTOROZ/LJUBLJANA 1975

45 K*P K-05 46 K-N6 N -Q6

Here the game was adjourned.

47 N-B4

If 47 NxN then 47...K*N 48 K-B5 K-K7 49 K*KP KxP(B6) 50 K-B5 P- R4! 51 K-K5 Kxp(B7) 52 KxP K-K2 and Black wins.

47 ... NxP The fortunes ha\ e turned! In spite 48 K-B5 N-Q6 of Blnek's pawn weaknesses it is 49 P-R3 P-K5I already White who has to fight for a 50 PxKP PxRP draw. 51 Nxp P-B6 52 N-B2ch K-B6 32 K-Bl K-N3 53 N-K3 KxP 33 R-B4 R-Q5! 54 K-N4 34 RxR NxR 35 N-Q3 K-B4! 54 P-K5 Nxp 55 KxN P-R4 56 K- K4 P’-R5 57 KxP P-R6 and Black Black does not want to take the ■wins. pressure off, even though White’s position is very passive. 54 P-B7 55 K-B3 P-R4 36 K-N2 N-B3 56 P-K5 NxPch 37 P-R4 PxP 57 KxP P-R5 38 K-R3 NxKP 58 K-K2 P-R6 39 NxN Kx.N 59 K-Ql P-R7 40 P-B6 K-Q3 60 N-B2 K-N7 41 KxP KxP 61 N-Rl N-B5! 42 K-N5 N-B4 43 N-N2 But not 61...KxN, because then 62 K-Bl N-Q6ch 63 K-B2 N-N4ch If 43 NxN K*N 44 KxP then of 64 K-Bl draws. course Black has a simple win because of his passed pawn. 62 N-B2 N-K3ch

43 ... P-K4 And White resigned, since he could 44 K-R6 K-Q4 noi slop the pawn queening.

126 R O U N D T E N

GAME 77 14 B-N.3

White: Baric J did not know the game Black: Mariotti Spielmann-Fliskascs, which went 14 0-N5 0-R7eh 15 K-NI, and (he King’s Gambit threat of B-Q3 proved too strong. My move was based on the variation Notes by Baric 14...P-R5 15 BxN Pxfich 16 PxPp*B 17 RxR, etc. 1 P-K4 P-K4 2 P-KB4 14 ... R-K3 15 QR-KI The King’s Gambit is sometimes good for a surprise: I also wanted to The right rook. The threat is 16 avoid some of the sharp Ruy Lopez BxN again. variations in Mariolli's repertoire.

2 ... P-Q4 3 PxQP P*P 4 N-KB3 N-KB3 5 N-B3 NxR

Another possibility is 5..B-Q.3.

6 NxN QxN 7 P-Q4 B-KN5?

Mariotti did not know this opening well. Theory recommends K2. 15 ... B-B4? 8 B*P N-B3 9 Bxp» K-Q2 Black gives up too early: 1.V. B-Q3 Black could regain his pawn by akes it much harder for White. 9 ...BxN 10 QxB QxQ 11 PxQ R-Bi 16 RxR NxP 12 B-KB4 NxP. but after 13 0 -0 -0 17 PxN BxPch White has a big advantage. Stoltz- IS K-K2 PxR Rcllstab. Swinetminde 19.32. !9 Q-B4th B-B4 20 P-N4 Resigns 10 B-N3 R-Klch 11 K-B2 K-Bl A very quick and easy win: in the 12 P-B3 P-KR4 whole game I only had to find four or 13 Q-N3 0-KB4 five moves!

127 P O R T O R O Z /L JU B L JA N A ,1975

GAME 78 5 N-0B3 P-KN3 6 B-K3 B-N2 White: Ljubqjevic 7 P-B3 0 -0 Black: Pianino 8 0 -0 2 N-B3 9 B-QB4 B-02 Km Lopez 10 0 -0 -0

1 P-K4 P-K4 This came as a bit of a suprisc to 2 N-KB3 N-QB.3 me. I was expecting 10 P-KR4 as in 3 B-N5 P-QR3 the second game of (he Karpov- 4 B-R4 N-B3 Korclmoy match. Karpov won (hat 5 0 -0 P-QIS4 game in grand style, but (hat is be­ 6 B-N3 B-N2 cause Rlack played rather super­ 7 P-Q3 B-K2 ficially. 8 P-0K4 0 -0 This tenth move of Karpov's was a 9 N-B3 N-QR4 challenge 1 readily accepted, al­ 10 PxP PxP though it soon became clear to me 11 jsjxNP NXB that my opponent was familiar with 12 RxR QXR the Planinc-Velimirovic game played 13 pxN K-N1 at the las! Yugoslav Championships. 14 N-R3 P-04 15 Nxp pxp 10 ... Q-N.l! 16 pxp Bxp ' 17 P-B3 B-Q4 This move was first found by 18 N(R3)-B4 Q-N2 Grandmaster Stein, and has been 19 B-N5 Drawn well known for over ten years. Although it is not held it) high regard theoretically. I have played it with success. The main idea is to open up GAME 79 lines on the 0-side for Black's pieces by means of a pawn sacrifice. While: Karpov Black: Veliniirovie 11 B-N3

Sicilian Defence Forced, as any other continuation gives Black the chance for a quick Notes by Velimirovic attack on the Q-side, e.g. (a) 11 P-KR4 R-BI 12 R-N3 P-0R4 1 P-K4 P-QB4 13 P-R4 NxN 14 BxN P-QN4 with 2 N-KB3 P-03 good chances, or 12 N-Q5 N(KB3)xN 3 P-Q4 PxP 13 BxN P-K3 14 B-N3 P-QR4 when 4 NxP N-KB3 Black has the initiative.

128 ROUNDTEN

(b) 11 P-KN4 P-QN’4 12 N(Q4)xP N- 13 BxRP K4 13 R-K2 RxN .14 N'xB N*BP and Black is belter, or 12 B-Q5 R-Bl 13 First thought of by Planinc. 13 BxN BxB 14 P-KH4 P-N5 15 N(R3)- NxRP N-(.)R4 14 Q-K2 NxHch 15 K2 NxKP 16 NxR NxQ 17 NxQ N- RPxN |>-Q4 lb 1>xP Q-K4 17 P-KB4 R5! anti White is in area I difficulties. 0-B4 18 K-Nl KR-RI 19 N-R7 R-B2 Mats-Ciufeld. USSR 1962. brings White nothing. Savon-Stcin. USSR 1962.

11 ... P-QR4 13 ... R-Bl 14 K-Nl In lending P-R5 and forcing White’s next move, as 12 P-QR40! is An improvement over Planinc- dangerous because of 12...NxN 13 Vellmirovic. Yugoslav Champion­ BxN P-QN4. ship 1975. which worn 14 Q-K2 N- QR4 15 B-N3 NxRch 16 Rl’xN P-Q4 17 PxP Q-K4 18 P-R4 R-R8ch 19 K- 12 N|Q4)-N5 P-K5! Q2 N-KSch 20 K-Kl RxRch 21 KxR 0-B4 22 K-Bl R-QR1 and Rlack is much better. The heart of Rlnck’s strategy is to be found in this sacrifice. Black opens the QR-filc and thus creates 14 ... N-QK4 tactical problems for W’liite. It is im­ 15 R-N3 N-B5 portant to note that Black is virtually forced to make this sacrifice as White The idea behind 14 K-Nl is that is already threatening 13 P-QR4. now after 16-..NxB 17 BP*N. Black blockading the Q-side. has no compensation for the pawn. The move played shows that Black is not too worried by his pawn deficit. Furthermore, White now has to decide which bishop to save.

16 Q-K2!

The correct move. After 16 BxN Rxr Black would find it easier to penetrate through to the white king.

16 ... NxB 17 QxN R-B4 18 N-Q4

129 PORTOROZ/LJ U B L J A N A 1975

24 N|Q4)-B2 N-B4! 25 Q*P

An imprecision which makes White’s defences less difficnll. Instead, after 18...P-QN4 followed 25 ... B-N4? by ...I’-N5 and tripling up on the QR-file. Black would have good The last mistake in a poorly played chances. game. Alter the correct 25...B-K1 26 B-R2 N-R5, Black would receive 19 P-QR31 R-QR4 full compensation for the two pawns as all his men are participating in Now 19...P-QN4 is- answered by 20 the attack on the white king. Here N-R2 and 21 N-N4. are two basic variations which effec­ tively illustrate the possibilities at 20 Q-Q2 N-Kl Black's disposal: (a) 27 R-Q4 R-QB4! (27...B-R1 is At this point Black was already weaker because of 28 0-N3. but not short of time. He intends to carry out 28 Q-B7 R.QR4! and ...RxBP.) 28 the correct strategic plan of trans­ KR-Ol (Or 28 Q K7 Q-N3! 29 KK- ferring a knight to the Q-side for the Q1 K-B2! 30 Q-Q6 R-B3! |Or final coup on the white king’s 30.. BxR.j, with Black having the position. However, it is not well heller chances in both instances.) executed and 20 . B-Kl followed by 28.. .R*P! 29 PxR NxPch 30 K-Bl N- ...N-02-K4 would have won at least K7eh 31 K-N2 NxR 32 RxN Q-R4 one rent po over the ga me. and Black has the better chances be­ cause of the threat . R-Ql: 21 N-05 P-K3 (b) 27 Q-K7 B-Bl 28 Q-R4 (28 O-B? 22 1N-N4 N-B2 is weak because of 28...R-QB4 29 Q- 23 P-B3 N-K3 B4 Rxpi 30 1’xR NxPeh 31 K-N2

130 ROUND TEN

Bxn and Black wins.) 28,..N>

26 B-R2 N-R5 27 Q-B7 GAMP. 80

Here I actually overlooked the White: Hurt arrival of the white queen on the Black: Musil seventh rank, and the irresistible threat R-Q8. 27 Q-K7 leads to die Sicilian Defence same outcome as after ...Q-N3 White has 28 R-06 B-QB3 29 KK-Q1 1 P-K4 P-0B4 2 N-KB3 N-QB3 27 B-K1 3 B-N5 P-KN3 28 R-Q8 B-B3 4 0 -0 N-B3 29 RxR QxR 5 N-B3 B-N2 30 0-KB4 Q-Qi 6 P-K.R3 0 -0 31 Q-K3 Q-B2 7 BxN QPxB 32 P-KB4 N-N3 8 P-03 P-N3 33 P-K5 B-K2 9 B-B4 R-Kl 34 N-Q4 N-B5 10 0 0 2 N-Q2 35 BxN QxB 11 P-K5 N-BI 36 R-Ql B-QR5 12 B-R6 B-Rl 37 Q-03 0-B1 13 KR-K1 N-K3 38 R-Q2 Q-Bl 14 N-K2 Q-B2 39 P-KN3 R-B4 15 N-B4 N-Q5 40 Q-K4 R-B2 16 NxN PxN 41 R-Q3 Q-BI 17 0-K2 B-KN2 18 BxB KxB The game was adjourned here. 19 0-B3 B-K3

131 PORTOROZ I..JUHLIANA RT5

20 (,)-N3 P-QB4 38 N*B KAN 21 P-KR4 0-02 39 P-R5ch K-N2 22 P-R4 R-KN1 40 K-Q2 P-K3 23 P-N3 P-KR3 41 K-K3 RII5D-B2 24 P-KB3 I< R2 42 R-Q6 R-B7 25 K-B2 OR-ORi 43 RxR RxR 26 R-K2 P-R3 44 RQ7 R-QR7 27 Q-R2 P-QN4 45 R-N7 R-R8 28 P*P PxP 46 K-N2 R-K8ch 29 Q-M P-B5 47 R-K2 R-KB8 30 NP*P P*P 48 R-KB2 R-K8ch 31 K-R6 PxP 49 K-Q4 R-QB8 32 PXP R-B6 50 K-K2 R-KB8 33 O-QRI R(N1)-0B1 51 K-K4 K-M 34 Q-R4 0*0 52 P-(.)4 K-N2 35 R*Q B B4 53 R-QR2 R-K8ch 36 Rxp P-N4 54 K-Q3 R-KB8 55 K-K2 R-QN8 56 R-R7 K-lN7i'h 57 K-K3 R-jNAch 58 K-K4 K-N8 59 R-(,)7 R-N5 60 P-B4 pxp 61 l

132 ROUND ELEVEN

ROUND ELEVEN

June 1 Sill

White Black Opening Result Moves 81 Musil (21) Garcia (3j) Sicilian Defence 1-1 41 82 Velimirovie m Hort (61) Caro-Kann Defence 1-1 -}■V 83 Plani nc (4) Karpov (8) Sicilian Defence 1-1 19 84 Mariotti (4J) ljubojevic (6) Sicilian Defence 1-1 40 85 Ribli (61) Baric (51) English Opening 1-1 31 86 Gligoric (61) Furman (61) Nimzo-lndian Def. H 59 8? Kamar (2) Parma (5J) Reti 0-1 50 88 Portisch (5) Oslerman (2) Queen's Gambit Acc 1-1 57

The tradition of the previous few rounds did not change and all the games were full of fire, tension, excitement, and mistakes as well as good moves. The spectators were satisfied that the Slovenians were doing better than they had in Port or oz and there were even some expectations that Flaninc would bear Karpov, bur in the Paulsen Variation Flaninc was glad to take a draw by repetition of moves. He remembered his game against Karpov from Madrid I9/.J where he lost terribly, and 1 his time he was more careful. In any ease it seems that only Black can play better in the system that Planinc chose. ln the centre of attention was the game Gligoric-Furman. It was a hard fight, where luck swung from one side to the other for a long time. In the second session Furman lost the exchange and was lucky to save the draw. Mariotti continued to play weakly and without ideas in the opening as White against Ljubojevic. then suddenly the Italian Grandmaster began to defend like a lion and it was l jubojevic who was fighting for a draw at the end (he missed too many good chances in this game). Musi) sacrificing again? His game against Garcia resembled the game Musil- Barle. He was material down with no attack or other compensation anywhere to be seen, Musi) could have resigned and nobody would have wondered why. But suddenly the black king was almost in a mating net and the draw was unavoidable for Garcia who played really carelessly, having a piece more and an easy win some moves earlier. Will Baric score again? As Black against Ribli he tried his luck again, but this time his good understanding of the position was only rewarded by a half point; but still not a had result!

133 PORTOROZ/1JUBLMNA 1975

GAME 81 5 NxP Q-B2 6 B-K2 N-KB3 While: Musil 1 0-0 P-K3 Black: Garcia 8 P-B4 B-K2 9 K-Rl 0-0 Sicilian Defence 10 B-K3 1N-B3 11 Q-Kl N-QR4 1 P-K4 P-0B4 12 R-01 N-B5 2 N-KB3 P-03 13 B-B1 P-QN4 3 N-B3 P-QR3 14 P-QN3 N-N3 4 P-Q4 pxp 15 B-03 B-N2

M usi!

134 ROUND ELEVEN

16 P-K5 PxP GAME82 17 PxP N(B3)-02 18 Q-N3 QxP White: Velimirovic 19 Q-R3 P-N3 Black: Hort 20 B-R6 KR-K1 21 R(Q1)-Kl Q-R4 Caro-Kann Defence 22 QxQ PxQ 23 N-K4 N-K4 Notes by Hort 24 N-KB6ch B*N 25 RxB N-N5 1 P-K4 P-QB3 2 P-Q4 P-Q4 3 PxP PxP 4 P-QB4 N-KB3 5 N-QB3 P-K3 6 N-B3 B-K2 7 pxp NxP 8 B-Q3 N-QB3 9 0 -0 0 -0 10 R-Kl N-B3

Also playable is 10...B-B3. The text move emanates from Petrosian; but it is interesting that Black had the same position with an extra tempo in the game Gligoric-Furman 26 BxRPch KxB from the same round, when the 27 RxBPch KxB Nimzo-Indian was played! The 28 RxB N-Q4 order of moves was 1 P-Q4 N-KB3 2 29 P-KR3 N(JN5)-K6 P-OB4 P-K3 3 N-0B3 B-N5 4 P-K3 30 P-B4 pxp 0 -0 5 B-Q3 P-Q4 6 N-B3 P-B4 7 31 Pxp P-K4 0 -0 PxQP 8 KPxP PxP 9 BxBP 32 N-B3 NxBP P-QN3 10 R-Kl B-N2 11 B-Q3 N-B3 33 R-Q7 N(Q4)-N3 12 P-QR3 B-K2, etc. 1 was naturally 34 R-QN7 P-K5 chagrined to see that game! 35 N-R4 0R-01 36 R-KB7 P-K6 11 P-0R3 P-QN3 37 R(K1)-KB3 N-K4 12 N-K51? 38 R(B1)-B6ch K-N4 39 N-B3ch NxN A very sharp move, first played in 40 R*B5ch K-N3 the game Velitnirovic-Ciric. Novi Sad 41 R(B5)-B6ch Drawn 1975. Ciric played 12...NxP? and

135 PORTOROZ/LJUBLJANA 1975 after 13 B-K.3 K-Rl 14 Q-R4: White More complicated was 16 B-N5 N- had the advantage. Q4! 17 N*N{Q5) B*B 18 N-QN4 N- Ql! with an unclear position.

16 ... RxN

Necessary: if 16...Q*N 17 QxQ RxQ 18 P-05. White again has the belter endgame.

17 B-N5 R-B2

Black first wanted to play 17.,.R- Q1 18 QR-Q1 R-B2, but after 19 P­ 05! his back rank would be very weak.

18 P-05! 12 ... B-N2 13 B-QR6 Q-Bl

The only move: 13...B*B 14 N*N Q-B2 15 NxBch Q*N 16 B-N5 is obviously better for White.

14 B*B QxB 15 Q-B3?

Weak. Much better was 15 NxN Qxjsi K-, P-Q5 Q-B5! 17 P*P PxP 18 Q-K2 QxQ 19 RxQ KR-K1 20 B-N5 (20 Rxp? BxP!) with the superior endgame for White.

15 ... QR-B1

After this move, chances are at least equal, and White eventually will have to play P-05 to avoid an inferior position.

16 NxN I Jon

136 ROUND ELEVEN

13 B-N5 B-K2 14 QR-01 P-N5 15 N-K2 P-03 16 B-B4 R-N3 17 BK3 R-QN1 18 B-B4 R-N3 19 BK3 Drawn

GAME 84

White: Mariotti Black: Ljubojevic White al last succeeds it) riddini Sicilian Defence himself of his we ah isolated QP. 1 P-K4 P-0B4 18 Nxp 2 N-KB3 P-Q3 19 NxN PxN 3 P-04 N-KB3 30 B*B RxB 4 N-B3 PxP 21 RxR QxR 5 Nxp P-0R3 22 QxQP Drawn 6 B-QB4 P-K3 7 B-N3 B-K2 GAME 83 8 P-B4 0 -0 9 0-B3 Q-B2 While: Planinc 10 0 -0 P-QN4 Black: Karpov n P-QR3 B-N2 12 P-B5 P-K4 Sicilian Defence 13 N(04)-K2 0N-02 14 B-N5 P-QR4 1 P-K4 P-QB4 15 BxN NxB 2 N-KB3 P-K3 16 N-N3 P-N5 3 P-Q4 PxP 17 PxP PxP 4 NxP P-QR3 18 N-Q5 BxN 5 B-K2 N-KB3 19 PxB 0-B4ch 6 N-QB3 Q-B2 20 Q-B2 Q-N4 7 0 -0 B-N5 21 Q-B3 0-N3ch 8 Q-Q3 N-B3 22 Q-B2 QxQeh 9 K-Rl NxN 23 KxQ N-N5ch 10 QxN B-B4 24 K-Nl B-01 11 0-03 P-0N4 25 P-R3 B-N3ch 12 B-83 R-0N1 26 K-R1 N-B3

137 PORTOROZ/LJUBLJANA 1975

27 QR-K1 B-Q5 5 0-0 P-N3 28 N-K4 NxN 6 P-N3 B-N2 29 RxN KR-N1 7 B-N2 0-0 3(1 R-QN1 K-Bl 8 N-B3 N-K5 31 R-R4 K-Nl 9 0-B2 NxN 32 P-N3 P-N3 10 BxN B*B 33 K-N2 K-N2 11 QxB N-B3 34 P-B(ich KXP 12 0R-01 R-Bl 35 R*P K-K2 13 P-KR4 P-Q3 36 R-KB1 R-KB1 14 P-04 PXP 37 B-B4 R-R2 15 N*P NxN 38 B-Q3 K-Kl 16 RxN BxB 39 P-N4 R-Nl 17 KxR R-B4 40 R-B6 B-B4 18 P-QN4 K-K4 19 P-K4 0 -ui 20 R-Kl P-B4 21 P-B3 P-QR4 22 P-R3 PxNP 23 PxNP Pxp 24 R(Q4|xKP RxR 25 RxR 0-R7eh 26 K-R3 R-B2 27 Q-K3 Q-N8

41 Drawn

CAME 85

Whiles Kibli Black: Barle

English Opening

1 N-KB3 N-KB3 28 RxP 0-KB8ch 2 P-KN3 P-QN3 29 K-N4 QxQirPcb 3 B-N2 B-N2 30 P-B4 RxR 4 P-B4 P-B4 31 QxR Drawn

138 ROUND ELEVEN

GAME 86 35 N-BI R(K1 )-QBI 36 P-B4 White: Gligoric Black: Furman

Nimra-Indian Defence

l P-04 N-KB3 2 P-QB4 P-K3 3 N-0B3 B-N5 4 P-K3 0-0 5 B-Q3 P-04 6 N-B3 P-B4 7 0-0 PxOP 8 KPxP PxP 9 BxBP P-QN3 10 R-Kl B-N2 11 B-Q3 N-B3 36 P-K5 12 P-QR3 B-K2 37 Bxp NxB 13 B-Nl R-Bl 38 RxN BxP 14 0-03 U-Kl 39 R-Q4 B-K3 15 B-N'5 P N3 40 N-K3 P-0N4 16 B-R2 N-Q4 41 P B5 PxKBP 17 B-R6 N*N 42 R-B3 pxp 18 P*N B-B3 43 N-Bl OKI 19 0R-Q1 N-K2 44 N-N3 B-B2 20 N-KS N-B4 45 R-K3 P-B6 21 B-KB4 B-N4 46 RxQ PxQ 22 B-KN3 B-KB3 47 NxRPch R*N 23 B-KB4 B-N4 48 RxR R-04 24 B-Q2 BxB 49 R-Q8 R-R4 25 OxB 0-B2 50 RxP RxP 26 P-0B4 R(B1 )-Ql 51 RIQ8)-03 R-R4 27 0-N2 P-B3 52 R*KN3dh B-N3 28 N-N4 K-N2 53 R-K3 R-R8ch 29 P-Q5 P-K4 54 K-B2 P-R4 30 0-02 P-ICR4 55 R-K7ch K-R3 31 N-K3 N-Q3 56 P-R4 R-R5 32 B-Nl R-QBI 57 P-N3 B-B4 33 r -q b i Q-B2 58 R-08 B-N5 34 B-03 R-B4 59 R-KB8 Drawn

139 PORTOROZ/1..JUBLJANA 1975

GAME 87 14 R-Q2 KR-01 15 QR-Q1?! White; Karnar Black: Parma Playing for a draw it is better to exchange rooks by 15 RXR RxR 16 Rcti R-Ql. because the rook is better placed on Q1 than on Q2. Notes by Parma 15 RxR 1 N-KB3 N-KB3 16 RxR N-QR4 2 P-KN3 P-Q4 17 N-Kl R-Nl 3 B-N2 P-K3 18 P-B4 BxB 4 P-B4 B-K2 19 QxB P-QN4 5 P-N3 0 -0 20 N-K4 NxN 6 B-N2 P-B4 21 QxN pxP! 7 P-K3 Black now ha:3 a small advantage. Another possibility is 7 PxP pxp 8 because White’s QBP is weaker than P-Q4 N-B3 9 O-O. transposing to the Black' s. Tarrasch Defence. 22 pxp 7 --- N-B3 8 0 -0 P-QN3 Not 22 B-K5 because of 22...0- 9 P-Q3 B-N2 N2. 10 0-K2 pxp 11 QPxP?!

White has only drawing ambitions and so he is satisficld with a sym­ metrical pawn formation. Usual is 11 NP*P. and with bis mobile centre White has the better prospects.

11 ... Q-B2 12 N-B3 P-QR3

The only way to play for something is ...P-QR3. ...P-QN4 and trying to find some chances on the O-side, but 22 ... Q-N2! of course that cannot be enough. 23 Q-B2 B-Bl

13 KR-Q1 P-R3 Mv idea was now to play 23.. .Q-N5

140 ROUND ELEVEN

24 B-K5 Q-N8 25 B*R QxNeh 26 K- 39 QxKP QxRP N2 NxP! and Black wins, but it does 49 B-B3 QxP not work because of the simple move 41 Q-Q5ch K-R2 25 K-B2 when the position is com­ 42 Q-B7 pletely drawn. So Black still has to wait. After 42 Q-K4ch P-N3 43 Q-N7 Q- R6ch 44 K-Q2 Q-K3 followed by 24 B-K5 R-Bl ...K-N.I and ...K-B2. Black wins 25 R-Ql Q-B3 easily. 26 K-B2 N-N2 27 P-K4? 42 ... Q-QB7! 43 0*B? 27 N-B3 or any other move was barter. 43 B-KI gives some drawing chances. 27 ... . P B3 28 B-Rl N-Q3 43 QxBch 29 P-K5 N-K5ch 44 K-K2 P-B5 30 K-K3 P-B4 45 Q-K6 Q-Q6ch 46 K-B2 P-B6 So now White has a weak bishop, 47 P-B5 Q-Q7ch bur that is still not enough for a win. 48 K-B3 Q-N4 49 Q-B8 P-KR4 31 P-N4?! B-K2 50 K-K4 Q-N7cb 32 PxP PxP 51 Resigns 33 R-Q5 Q-KN3 34 Q-KN2 Q-K3 35 N-B3 R-Ql

Not 35...N-B3 because of 36 Q- GAME 88 02! NxRch .37 PxM and the two central pawns arc: more than enough White: Pnrtisch for the exhangc. Black: Osterman

36 N-Q2 Queen’s Gambit Accepted

After 36 RxRch BxR 37 N-Q2. 1 P-04 P-Q4 White has good drawing chances. 2 P-QB4 PxP 3 N-KB3 N-KB3 36 ... RxR 4 P-K3 B-N5 37 PxR QxQP 5 Bxp P-K3 38 NxN PxN 6 0 -0 P-QR3

141 PORTOROZ/LJUBUANA 1975

7 N-B3 N-B3 30 P*N 0-N4 8 P-KR3 B-R4 31 B-Bl N-Q6 9 B-K2 B-Q3 32 B-Q2 Q-N3 10 P-QN3 0 -0 33 0-B3 N*R 11 B-N2 Q-Kl 34 RxN BxP 12 N-Q2 B-N3 35 P-N3 B-K5 13 N-B4 B-N5 36 B-KB4 K-R2 14 P-R3 BxN 37 N-N3 R-Q8 15 BxB N-Q4 38 N-B5 RxR 16 Q-Bl 0-K2 39 QxR B-B7 17 R-Q1 0R-Q1 40 Q-K3 QQB3 18 B-Kl P-K4 41 Q-B3 B-N3 19 pxp NxP(K4) 42 B-Bl Q-B3 20 Q-N2 N-QB3 43 Q-N3 0-B4 21 QR-B1 R-Q2 44 P-KR4 Q-N8 22 B-KN4 P-B4 45 P-R5 B-B7 23 B-KB3 B-B2 46 Qxp QxB 24 R-B2 KR-QI 47 K-N2 Q-08 25 RIQD-Bl P-R3 48 B-K2 Q.Q7 26 P-QN4 P-QN4 49 K-R2 R-Kl 27 N-R5 N-K4 50 B-Bl Q-N4 28 B-K2 P-B5 51 B-R3 0-B3 29 P-K4 P-B6 52 Q*Q PxQ 53 NxP PB3 54 N-B5 RK7 55 K-N2 K-N2 56 B-Q7 R K4 57 P-N4 B.K5ch 58 Drawn

142 ROUND TWELVE

ROUND TW ELVE

June 17th

White Black Opening Result Moves 89 Garcia (4) Osterman (24) Grunfeld Defence 4-4 51 90 Parma (6}) Portisch (54) Ruv Lopez 4-4 58 91 Furman (7) Kamar (2) Benoni Defence 4-4 44 92 Barle (6) Gligoric (7) Queen’s Pawn 0-1 45 93 Ljubojevie (64) Ribli (7) Sicilian Defence 4-4 41 94 Karpov (84) Mariotti (5) R uy Lopez 1-0 .•22 95 Hort (7) Planinc (44) Queen’s Pawn 1-0 46 96 Musil (3) Velimirovic (6) King’s Indian Rev. 1-0 26

Again the spectators were not disappointed. Karpov won quickly against Mariotti, who played the unusual 4...Q-B3 in the Ruy Lopez. This may have been a good psychological try, but the move 7...P-N4?? can only be regarded as suicide. 7,,.P-QR3is normal with an interesting game. Karpov bad an easy job as the black king stayed in the centre and all the files and diagonals were opened to him. Musil surprised his fans by beating Velimirovic, who seemed to be losing his self confidence. The Yugoslav Champion handled the reversed King’s Indian without any understanding, with the result that he definitely lost his place amongst the leading players, Ljubojevie wanted to break his line of draws, but be did not succeed. Ribli played well and it was a pleasure to see how effective was the co-ordination of bis pieces after the exchange sacrifice on QB6. He must have missed a win somewhere—Karpov himself was of this opinion and stated that he preferred Black’s position, but who would not? Barle-Gligoric and Hort.-Planinc were influenced by time trouble. Barle beat Gligoric in the 1975 Yugoslav Championship and this time he tried 2 B-N5 which Hort also played against Pianino. Gligoric slowly improved his position and after 38...P-B5! White was outplayed and resigned after the adjournment. Planinc played with great originality and the game was very complicated, but in time trouble it was White who kept his head. The longest game was Parma-Portisch. Nobody can play the Breyer Variation of the Ruy Lopez as well as Portisch. He placed his pieces on the best squares and won a pawn, but this lime his technique failed him and Parma remained unbeaten. A draw was agreed after Black had tried almost all possible tricks in the ending. 16...R-N1 seems to rehabilitate a position previously considered inferior for Black.

143 PORTOROZ/LJUBLJANA 1975

GAME 89 31 pxp K-Nl 32 P-R4 KR-N1 White; Garcia 33 P-N4 B-N2 Black: Ostcrman 34 B-N2 K-Bl 35 P-NS K-K2 Grunfeiri Defence 36 B-Q4 K-Ql 37 B-K2 N-Bl 1 N-KB3 P-Q4 38 K-N3 K-Kl 2 P-KN3 N-KB3 39 K-N4 K-K2 3 B-N2 P-KN3 40 B-Q3 N-Q2 4 0 -0 B-N2 41 B-QB2 R-Rl 5 P-Q4 0 -0 42 R-Rl R(KR1)-QN1 6 P-B4 P-B3 43 B-Q3 N-Bl 1 P-N3 B-B4 44 RxR RxR 8 B-N2 P-QR4 45 R-Rl RxR 9 N-B3 N-K.5 46 BxR K-Q2 10 R-Bl NxN 47 P-R5 K-K2 11 BxN B-K5 48 B-Q4 K-Q2 12 B-R3 BxN 13 PxB P-K3 14 P-B4 N-Q2 15 B-KN2 P-R5 16 0-B2 pxNP 17 pxNP Q-N3 18 P-QB5 Q-B2 19 R-Rl P-N3 20 P-0N4 Q-N2 21 KR-N1 P-QN4 22 B-Bl P-R4 23 B-Q3 N-B3 24 P-R3 0-B2 25 Q-K2 P-R5 26 K-N2 B-R3 27 B-Q2 K-N2 49 P-R6 B-Rl 28 Q-K5 QxQ 50 K-B3 K-K2 29 QPxQ N-Q2 51 K-K3 K-Q2 30 B-QB1 pxp 52 Drawn

144 ROUND TWELVE

GAME 90 34 QB1 N-Q4 35 N(B4)-Q2 0-B7 White: Parma 36 B-Rl N-N5 Black: Portisch 37 N-B4 0-06 38 N(B3)-Q2 QxQch Ruy Lopez 39 KxQ P-B3 40 P-B4 N-B7 1 P-K4 P-K4 41 B-B3 2 N-KB3 N-QB3 3 B-N5 P-0R3 4 B-R4 N-B3 5 0 -0 B-K2 6 R-Kl P-QN4 7 B-N3 P-Q3 8 P-133 0 -0 9 P-KR3 N-Nl 10 P-04 QN-Q2 11 QN-Q2 B-N2 12 B-B2 R-Kl 13 P-QN4 B-KB1 14 P-OR4 N-N3 15 P R5 N(N3)-Q2 16 B-N2 R-Nl 41 K-B2 17 R-Nl B-Rl 42 P-B5 P-N3 18 B-Rl P-R3 43 N-N6 N-N1 19 B-Q3 P-Q4 44 PxPeh KxP 20 PxQP pxp 45 K-K2 K-B4 21 RxR 0 XR 46 N-Q5 N-Q5ch 22 P-B4 PXP 47 K-Q3 N-N4 23 B*BP BxQP 48 P-N4ch K-K3 24 NxP RxP 49 N-KB4ch K-B2 25 B-Bl R-Nl 50 B-N2 N-B3 26 B-B3 RxR 51 N-B4 N-Q3 27 0 XR P-B4 52 N*Neh BxN 28 N(Q4)-B3 Q K3 53 N-R5 B-K2 29 0-03 B-N2 54 B-B3 K-K3 30 Q-Nl B-B3 55 K-K4 B-Ql 31 B-B4 B-Q4 56 B-Q2 Bxp 32 Q-Q3 BxB 57 B*P B-N5 33 NxB Q-K5 58 N-B4ch Drawn

145 PORTOROZ/LJUBLJANA 1975

G A M E 91 16 P-B3 N(Q2)-B3 17 N-B1 B-Q2 While: Furman 18 R-KR2 0-B1 Black: Kartiar 19 R-Nl N-Nl 20 N-N3 N-K2 Bcnoni Defence

Notes by Furman

1 P-04 N-KB3 2 P-QB4 P-B4 3 P-05 P-KN3 4 N-QB3 B-N2 5 P-K4 P-03 6 N-B3 0 -0 7 P-KR3 P-K4

Leading to a closed position akin to the King’s Indian. 7...P-K3 is a sharper continuation. 21 pxp NPxP 22 R(R2)-QN2 Q-Ql 8 B-N5! 23 R-KR2

This makes it more difficult for 1 was concerned about Black’s Rlack to prepare ...P-KB4. If Black potential K-side play, and so decided drives the bishop away as in the to rule out ...P-KB4 before anything game, then Q-Q2 will gain a tempo else. later by attacking the KRP. 23 ... r -q n i 8 ... P-KR3 24 RxR QxR 9 B-K3 K-R2 25 P-KR4 Q-B2 10 P-KN4 P-R3 26 P-R5 P-N4 11 B-Q3 Q-R4 27 R-QN2

Ultimately a loss of time, as the Now Black's counterplay has been attempt to get in . ..P-QN4 is easily completely squashed. White's ad­ foiled. vantage in space and his control of the open file ought to be enough to 12 N-Q2 N-Kl ! win. 13 P-R3 0-B2 14 P-N4 N-Q2 j 27 ... N-KB3 15 Q-Bl P-N3 I 28 Q-Nl R-QRI

146 ROUND TWELVE

29 B -Q 2 R -R 2 After 36 PxB N-Bl, White would .30 B-B2 B-Q B1 remain a pawn down. 31 N -R 4 N -0 2 32 N -N 6 N xN 36 BXBP 33 B -R 5! 37 BxR Q xB 38 K -B2 P-.N5 This is stronger than (he simple 33 39 B -R 5 0 - 0 2 R*N. since White gets his dark 40 R -N 7 Q -R 5 squared bishop into play. 41 B -Q 8?

33 ... R-N2 While should win after 41 B-B3 B- 34 BxN B3 42 0-N3.

Alter 34 RxN R*R 35 QxR QxQ 3b 41 «•< Q xB Pt B*Q B-Q2. Black would have good 42 BxN O-OSeh chances of saving the ending as the 43 K -B l 0 -B 5 c h enemy king cannot easily penetrate 44 K-K1 (> R 6 th on the Q-side. 45 Drawn

34 ... Q-NJ White cannot avoid pert- 35 B-R4 check: 45 K-Bl Q-RSch 46 K-Nl Q- 05ch 47 K-B1 0-B5ch etc.

35 ... BxP!?

Black defends stubbornly and finds the besr practical chance.

36 B-B6 Kamar

147 POKTOROZ/LJU BLJAN A 1975

GAME 92

While: Barle Black: Gligoric

Ouccn’s Pawn Opening

L P-Q4 N-KB3 2 B-N5 P-0 3 3 B*N KP*B 4 P-K3 P-KN3 5 B-Q3 P-KB4 6 N-Q2 B-N2 7 0-B3 0 -0 36 Pxp Q-B3 8 N-K2 N-Q2 37 N-Bl B-KScli 9 N-KB4 N-B3 38 N-Q3 P-B5 10 P-KR4 P-KR4 39 NPxP QxRP 11 0 -0 -0 P-04 40 K-Bl Q-K2 12 0-K2 0-03 41 13 P-B4 P-B3 Q-Qi P-R5 42 P-B3 BxN 14 K-Nl B-0? 43 Q*B P-R6 15 R-QB1 KK-K1 Q-R5 16 P-KN3 P-N3 44 0 0 2 45 Bx'Pch K-R2 17 KR-Ql O R 0 1 18 pxp NxP 46 Resigns 19 N*N Q*N 20 B-B4 0-0-3 21 N-B3 R-K2 G A M E 9.7 22 N-N5 B-Kl 23 Q-B2 Q-B3 While: Ljiihojevic 24 N-R3 B-R3 Black: Kibli 25 N-Nl R-B2 26 K-K2 P-B4 Sicilian Defence 27 pxp R*P 28 RxR QxR 1 P-K4 P-0B4 29 Q-Q3 Q-K2 2 N-KB3 P-03 30 N-B3 B-N2 3 P-Q4 pxp 31 B-N3 B-QB3 4 NxP N-KB3 32 0-02 P-R4 5 N-0B3 P-K3 33 N-K2 P-R5 6 B-K3 P-0R3 34 RxR P*R 7 Q-B3 Q-B2 35 B-B4 P-R6 8 0 -0 -0 QN-Q2

148 ROUND TWELVE

9 R-K2 P-QN4 36 P-QB3 N-B5ch 10 P-K5 B-N2 37 K-B2 N-R6eh 11 PxP BxP 38 KB1 P-N5 12 Q-R3 B-K2 39 pxp Bxp 13 B-B3 R-QB1 40 N-NSch K-B3 14 K-NL 0 -0 4! N-K4ch K-K3 15 B-B4 Q-N3 42 Drawn 16 BxB OxB 17 0-B3 QyQ 18 N xQ KR-Q1 19 K'R-Kl K-Bl 20 P-KR3 GAME 94

While: Karpov Black: Matiofti

Ruv Lopez

Notes by Marioiti

1 P-K4 P-K4 2 N-KB3 N-QB3 3 B-N5 B-B4 4 0 -0 Q-B3?!

20 RxN A new move: usual here is 4. N- 21 PxR N-04 B3 or 4...KN-K2. or even 4... N-Q5: 22 B-Q2 N(02)-N3 but I have plavcd (lie text move 23 N-Q4 N-QB5 before, with some success. 24 R-KB1 P-K4 25 N-N3 P-QR4 5 P-B.3 KN-K2 26 B*K1 P-B4 6 P-QN4 27 P-N4 P-B5 28 R-Q3 P-R5 Most of my opponents in this 29 N-Q2 K-B2 position have played 6 P-04 P*P 7 B- 30 N-K4 K-K3 N5 0-N3 8 BxNi K?) N*B 9 Pxl> B- 31 B-Q2 Nx Boh N3 10 N-H3 0 -0 11 15-03 P-Q3 12 P- 32 N*N NxPch K5 Q-R3. with an equal position. 33 K-N2 N-04 34 N-K4 R.QN1 6 ... B-.N3 35 Kf 1511-01 N-N3 7 N-R3 P-N4??

149 PORTOROZ/LJUBLJANA 1975

17.. 0 -0 -0 is a little better, but Black’s position is still very bad.

18 P-K5 PxP 19 B-R6 B-Ql

Or 19. Q-Rl? 20 B-N5!

20 BxQ BxQ 21 BxKP P-KB4 22 N-R5 Resigns

Black loses a pawn without any counterplay. After this move, Black’s position is very bad: necessary was 7...P-OR3 8 R-K2 P-04 9 P-03 PxP 10 P*P Q- N3, with equality. GAME 95 8 P-Q4 P-N5 White: Horf 9 NxP NxN Black: Planinc 10 pxN QxKP 11 QxNP Queen’s Pawn

Perhaps II 0-K2 or 1 I 0-03 is Notes by Hort better, with the threat of N-B4, and positionally White is much better. 1 p.Q4 N-KB3 11 ... QxBP 2 B-NS N-KS 12 R-Nl R-KN1 13 Q-R5 0-N2 Other possibilities are 2...P-B4, 14 P-N3 P-QB3? 2.. .P-03. 2...P-KN3, 2.. P-04. 2. . P-K3. and 2.. P-QN3. 14.. 0-N3 was necessary. 3 B-B4 N-QB3I? 15 B-Q3 P-Q3 16 N-B4 B-N5 Very interesting, and a completely 17 Q-R4 new move.

If 17 NxPeh K-Q2 18 QxBP KxN. 4 N-KB3 White's attack peters out. After 4 P-KB3 there could follow 17 ... N-Bl? 4.. .P-K4 5 PxP P-KN4!

150 ROUND TWELVE

4 ... P-K3 5 ON-02 P-04 6 N*N?!

While thought that he had the better game. After 6 P-K3, 6...P- KN4 was possible.

6 ... PxN 7 N-K5 B-Q3J 8 P-K3 0 -0 9 B-N3?!

Reiter is 9 B-ON5. 15 B-R6

9 ... B*N White could not resist the 10 P*B Q-N4 temptation to play this. 15 B-N5 N- 05 16 P*N PxP 17 0-N4 was Nor 10.. Q-K2 11 0-02 Q-B4 12 unclear. Now Black finds a very O-O-O. with the better game for strong reply. White- 15 ... 0-K2! 11 0-02 16 P-0R3

Not 16 B*NP, because, of 16.. .N- Also to be considered seriously was N5! 11 B-KB4 Q-B4 12 P-KN4 0-N3 13 0-K2! 16 ... PxB!

11 ... Nxp Best. After 16...N-Q1 I7B-QB4P- 12 0 - 0 -0 KB3 18 0-N3 BxB 19 QxBeh N-B2 20 0 XKP- the position would be This entails sacrificing a pawn, hut equal. Now Black hopes to attack White did not like 12 Q-Q4 N-N3 13 along the <0N--file. QxKP P-KB4 14 0-0B4 P-B5. with good chances for Black. 17 Q*N P-B3!

12 ... N-B3 The white bishop is out of play. 13 0-B3 P-K4 14 K-02 B-K3 18 K K -Q l!

151 PORTOROZ/LJ U BU AN A 1975

llte best practical chance. After 18 change queens and keep his king QxRP QR-N1, Black gets a near the centre. dangerous attack. 28 K-R2 0-07 18 . . a QR-NI 29 P-QB3 19 R-Q7 B*R 20 RxB Q-Kl This is the best defensive pawn 21 QxQBP Q-N3 structure. 22 QxRP R fN li-Q l 23 RxR RxR 29 ... Q-06 24 QxRP 30 P-QR4 R-B5?

After a series of forced moves, a In this crazy position, Black starts crazy position results. If White could to get into time trouble, and loses his activate his bishop, he would stand grip. better: without it, he is fighting des­ perately for a draw. 31 Q-N5 K-K2 32 P-B3! 24 ... Q-B2! White's bishop hopes for a future.

32 ... K-B2 33 Q-N4ch

Now White is better, and only time- trouble can change (he complexion of the game again.

33 ... K-B2 34 Q*P 0 X0 35 PxQ R-B5 36 K-N3 RxKP 37 P-R5

Safer was 3" B-B2 K-K3 38 P-B4 K-Q3 39 K-B3. and White can slowly push ithe pawns . Now both sides arc winning.

37 RxP 38 P-R6 R-06 39 K-B4 R-Q8

152 R O U N D T W E L V E

40 P-N4 K-K2 4 P-KN3 P-Q4 41 P-N5 K-Q3 5 QN-02 N-B3 42 B-B2 K-QR8 6 B-N2 B-K2 43 B-B5ch K-B2 7 0 -0 0 -0 44 K Q5 R-Q8ch 45 K-B4 R-0R8 The position is now a King's Indian with colours reversed. The last eight moves were played at lightning speed. Now White’s flag 8 P-K5! N-Kl!? fell; but White saw that forty-five moves had been made, and scaled, Usual is 8...N-Q2, c.g. Browne- Uhlmatm (Informator 13/30). The 46 P-N6ch text move is designed to create dynamic countcrplay on the 0-side, Which wins by force, e.g. 46...K- and also helps to defend the K-side. B3 47 P-N7 R-QN8 48 B-N4 K-B2 49 B-Q6ch KxB 50 P-R7etc. 9 R-Kl P-QN4 So Black resigned, but in fact 10 N-Bl P*N5 neither player deserved to lose this 11 P-KR4 P-QR4 extraordinary game! 12 N|B1)-R2 P-R5 13 N-N5!

GAME 96 White must press on with his K- sidc attack. While: Musi! Black: Velimirovic 13 ... P-R6?!

King’s Indian Reversed Perhaps 13...N-Q5 is better: with the text move, Black gives up a Notes by Musi! pawn.

1 P-K4 P-QB4 14 PxP N-05 2 N-KB3 N-QB3 3 P-Q3 After 14...P*P 15 0-R5. White has a strong attack and better Velimirovic always plays the chances. Dragon Variation, and 1 wanted to avoid this: for psychological reasons, 15 PxP Pxp it is sometimes better to choose a 16 N|N5)-B3 different system. Tlie knight on Q4 is very strong, 3 ... P-K3 and controls the centre. I didn’t want

153 PORTOROZ/LJUBLJANA 1975 to waste time, hence the text move, hour on his 20th move and still went which gives Black the chance to wrong. repeat moves. 20 ... R-R2? 16 ... N-N4 17 N-N5 Of course, if 20,. .BxR? White wins with 21 NxRPch PxN 22 Q-N6ch I wanted to tempt Black. B-N2 23 Q-R7 mate. The correct move was 20-..P*N! which isn't dan­ 17 ... P-B3 gerous for Black: 21 PxP BxR 22 P- N6 R-B4! 23 Q-R7ch K-Bl with a Alter 17...N-Q5, I would have lost position for While. After liked to have played 18 N(R2)-B3. 20.. .PxN! a good move would be 21 hut Black then gets more active play. BxNP. but Black would still have better chances. 18 PxP BxP 19 Q-R5 21 N*KP BxN 22 RxB* A very complicated position, re­ quiring precise analysis. Black is already lost. 19 ... P-R3 22 ... N-Q5 20 N-N4?!

If 22...BxR. 23 BxQP with the double threat of 24 RxPdis ch or 24 Nxpch, to which there is no defence. 22.. N(N4)-B2 is no good either, be­ cause after 23 R-N6, White’s attack is irresistible.

23 RxN! N-K7ch

There is nothing bettor: if 23.. . RxRor 23...QxR.24 NxBch P*N 25 BxQPeh and wins. The rest is simple.

My last lew moves were not wholly 24 RxN BxR accurate, but Black was already in 25 BxQPeh K-Rl time trouble: he now thought half an 26 N-K5! Resigns

154 ROUND THIKTEEN

ROUND THIRTEEN

June 18th

White Black Opening Result Moves 97 Velimirovic (6) Garcia (4J) Sicilian Defence 1-0 36 98 Planinc (4i) Musil (4) Sicilian Defence 1-0 42 99 Mariotd (5) Hort (8) Sicilian Defence H 44 100 Ribli (7J) Karpov (91) Queen’s Indian Def. H 9 101 Gligoric (8) Ljubojevic (7) Albin Counter Gamb. 1-0 45 102 Kamar (21) Baris (6) Reti 0-1 55 103 Portisch (6) Furman (71) Queen’s Indian Def. H 52 104 Oslerman (3) Parma (7) Queen's Indian Def. H 19

This round started very quietly with a draw between Ribli and Karpov. The World Champion decided not to take any risks and drew in nine moves! Another draw followed in the game Osterman-Parma; Black wanted to Fight at first, but the sight of two hanging pawns was too much for Parma and he offered a draw on move 19. All the other games took almost five hours to play and so the public were rep aid for the absence of the World Champion. The central games of the round were Portisch-Furman and Gligoric- Ljubojevic. Portisch played a new idea in the opening, when Black failed to play . . .P-QR3 before castling and White achieved a positional advantage. Black had an isolated pawn and in the endgame it was almost a miracle that Black lost only his pawn. It seems that White had time to move his king to the centre before starting serious operations. After the adjournment Furman did not have a difficult task in keeping Portisch to a draw because of the reduced material on the board. The Yugoslavian derby was very interesting, because Ljubojevic played a very risky opening—Albin’s Counter Gambit—a choice that indicated that Black was not thinking about a draw at all. GHgoric look the chance that was offered to him and after 16...B-B1? 17 Q*P it was obvious that the march of Black’s QRP and QNP would be too slow. Ljubojevic defended with great skill but did not Succeed in making a draw. In winning this game Gligoric had the best chances in the race for second place; but with a lead of one point and only two rounds to go it wms virtually impossible for anyone to catch Karpov.

155 PORTOKOZ/LJUBLJANA 1975

GAME 97 worth considering, as the black ON has moved away and taken up a weak White: Vclimirovic position on the Q-side.) 12,,,P-K4 Black: Garda etc.

Sicilian Defence 11 PKR4!

Notes by Vclimirovic

1 P-K4 P-QB4 2 N-KB3 P-Q3 3 P-Q4 PxP 4 N*P N-KB3 5 N-QB3 P-0R3 6 B-KNS P-K3 7 P-B4 B-T<2 8 Q-B3 0-B2 9 0 -0 -0 0N-Q2 10 B-03!

The most aggressive and dan­ gerous continuation for Black. White A novel and most noteworthy move brings the KR to the K-file. which, which merits further consideration. combined with the advance of the White is exploiting the fact that KP, creates promising tactical possi­ Black has no strong developing bilities for White, move, as 11.. P-Q.N4 is no good because of 12 B*N BxB (Or 12...N*B 18 ... P-KR3 13 P-K5 B-N2 14 Q-N3.) 13 P-K5 R- N2 14 Q-R5 (Or perhaps even 14 The Vclimirovic-Kazzaz game, NxRP.) 14...1M’ 15 NxKP Q-N3 16 Nice Olympiad 1974. was a serious | B-B5 when White has a winning blow to the main continuation ! attack. 10...P-QN4. After 11 KR-Kl R-N2 Clearly Black cannot even consider 12 Q-N3 0 -0 -0 13 BxP! PxR |4 accepting the sacrifice, as after N(Q4)*NP Q-N3 15 P-K5 P-Q4 16 P- ll...PxB comes 12 RPxP RxR 13 B51. Rlack’s position quickly RxR N-KN1 14 R-R8 K-Bl 15 0-R5. collapsed. and a rapid victory. With 10..P-KR3 Black is attempting to create a stable position 11 ... Q-N3 in the centre, e.g. 11 BR4 P-KN4 12 P*P N-K4 13 Q-K2 N(B3)-N5 or 11 A dubious' move, as it brings the Q-R3 N-N3 12 P-B5 (12 B-R4 is black queen to a weaker position.

156 ROUND THIRTEEN

Left to right: Lfubojevic, Karpov, Gligoric. Hort, Rihlr

11.. .N-B4 is crucial for an evaluation Black hastens to withdraw his king of While’s idea. to a haven on the O-side, as after 15.. .PxP 16 NxBch PxN 17 QxBP P- 12 N|Q4).K2 N-Bl B4 18 BxBPor 17...N-Q2 18 N-B3 or 17.. .P-K4 18 Q-N3 White has a dangerous initiative. Black is in trouble now, and 12.. . N-B4 is no longer strong as after 16 Q-N3! 13 BxN RxR 14 P-KN4 B-Q2 15 P-N5 B-K2 16 KR-Nl 0 -0 - 0 17 P-B5 The simplest wav of gaining a White’s supremacy in the centre and decisive advantage, although 16 B- on t he K - s i d e i s ob viou s. B4 would also have worked.

13 BxN BxB 16 0 -0 -0 14 P-K5 P*P 17 PXP B-K2 15 N-K4 B-Q2 18 Qxp N-N3 P0RT0R07./LJUBLJANA 1975

27 R-QB1 Q-N4 28 N-B4

Black's bishops arc inactive and in trying to seize the initiative by force, he precipitates his end.

28 ... B-R6 29 R-B2 R-Kl 30 N-N6 R-Ql 31 N-K5 R-Bl 32 K-BI R-B8ch

■ Here, Black had (he possibility of 19 P-R5? i an interesting (if insufficient) com- ■ bination: 32...BxPch 33 RxB R-B8ch In a dominant position White • 34 K-B2 Q-R5ch 35 K-02 BxN (If makes a mistake which could have ! 35...Q-Q8ch 36 K-B3.) 36 PxB Q- had serious consequences. After the 08ch 37 K-B3 Q-B8ch 38 R-B2 Q- simple 19 N-Q6ch B*N 20 P*B Black R6ch 39 K-Q4dis ch etc. is left a pawn down in a weaker position. 33 K-02 B-NSch 34 K-K2 R-B4 .19 ... B-Bl 35 N-B4 R-Q4 20 Q-B6 B-K2 36 P-R4 Resigns 21 QxBP B-Kl 22 Q-B3 Nxp 23 0*N3 NxRdi? GAME 98 Belter is 23...Q-B2. forcing the exchange of queens, and even though White: Planine White is a pawn up he is on the Black: Musil defensive. Sicilian Defence 24 RxN RxR 25 PxR! B-QB3 Notes by Parma

25...Q-B2ch would not be a strong 1 P-K4 P-QB4 move now, as after 26 QxQch KxQ 2 N-KB3 P-K3 White has the possibility of 27 N-B4. 3 P-04 PxP 4 NxP P-QR3 26 K-Nl R-Q1 S B-K2 ROUND THIRTEEN

While is playing a new move in the 20 B-N2 R-N5 Paulsen Sicilian. Usual is 5 B-Q3 or 21 R-Ql! 5 N-QB3,

5 ... N-KB3 6 N-QB3 Q-B2

After 6...B-N5 White must sacrifice a pawn with 7 0 -0 BxN 8 PxB Nxp 9 B-B3, and then B-R3.

7 0 -0 B-NS

7... P-03 transposes to the Sche veil ingen Variation.

8 Q-Q3 N-B3 9 K-Rl NxN 10 QxN B-B4 White is better because the black 11 Q-Q3 P-QN4 king is not very secure. White's KBP 12 P-B4 is protected, for example 21.. .RXBP? 22 B-R3 or 21 ...BxP 22 B-R3ch K- Some rounds ago, in the game KJ 23 RxB RxR 24 B-Q6. Planinc-Karpov, White played 12 B- B3, and after 12...R-QN1 13B-N5B- 21 ... QR-KN1 K2 14 QR-Q] P-N5 Black had no 22 P-N3 B-B4 problems. The threat was R-Q3, Black could 12 ... B-N2 not pilay 22... Q-B3 because of 23 13 B-B3 P-N5? QxBch Q*Q 2d■ BxPch.

Best for Black is 13...P-KR4! 14 P- 23 0-B3 Q-N3 K5 N-N5 15 BxB QxB 16 N-K4 R- QB1. with just a small advantage for If 22I...R(N5)-N3, then 24 P-B5. White, as in (he game Partna- Manilovic, Yugoslavia 1972. 24 QxPch K-Kl 25 P-B4?! 14 P-K5J PxN 15 PxN PxBP Better was 2v5 0- K5 at onee. 16 QxBP BxB 17 RxB K-K2 25 Q-N2 18 P-QN3 B-Q3 26 R-Q3 P-KR4 19 0-Q 2 KR-KN1 27 Q-K5 P-03

159 PORTOROZ/LJUBLJANA 1975

28 QxRP 5 N-OB3 P-QR3 6 B-K3 On 28 Q-K2 RxBP, Black wins a pawn with a good game. 6 B-K2 is more in vogue at the moment. 28 ... Q-K5 29 Q-R3 RxBP 6 ... Q-B2 30 Q-B1 R-B4 7 B-Q3 N-B3 31 K-N2 R-N3 8 N-N3?I 32 B-B3 R-R4 33 Q-Kl?! Q-N2? This manoeuvre is premature, but Black still has to play very exactly. Missing the last chance: 33...RxRPch 34 KxR R-R3ch 35 K- 8 ... B-Q3! N2 Q-R2 with dangerous possi­ bilities. and now he is lost. Much better than 8...P-QN4 9 P- B4 P-Q3 10 Q-B3 and White’s 34 P-QN4 R(IN3)-R3 position is satisfactory. After the text 35 P-KR4 B-N3 move White cannot play 9 0 -0 or 9 36 B-Q2 R-N3 P-B4, 37 B-N5 P-B3 38 QxPch Q-K2 9 N-R4 P-QN4 39 QxQch K*Q 40 B-B4 RxRP Black also considered the im­ 41 BxPch K-K3 mediate 9...0 -0 , bur he was mote 42 P-B5 Resigns afraid of 10 B-N6! than 10N-N6.

10 N-N6 R-QN1 11 N*B R*N GAME 99 12 P-QR4 0-0

Whites Mariotti Black has given up the bishop Black: Hort pair, but he is ahead in development and White has to think about what to Sicilian Defence do with his king.

Notes by Hort 13 PxP pxp 14 P-N3 1 P-K4 P-0B4 2 N-KB3 P-K3 If 14 P-R3, 14...B-B5 would 3 P-Q4 Pxp follow, with a comfortable game for 4 NxP N-QB3 Black.

160 ROUND THIRTEEN

14 ... N-K4 If 2U P-B3, 20.. P-N5! could 15 R-R7 follow

White has to decide how best to 20 ... Q-R4 deploy his pieces. 21 P-N3 N-K4 22 NxN QxN 15 ... Q-Nl 23 K-N2 16 R-R2! While consolidates his position as The only move, because of the much as possible. 1 f lie can exchange threat 16...N(K4)-N5. queens and keep the QR-lile, his chances are not worse. 16 ... N-B5 23 R-Nl! Also possible was 16...NxBeh 17 24 P-KB4 Q-QB4 PXN B-N5ch. with a minimal ad­ 25 Q-K2 KR-B1 vantage to Black. 26 KR-QR1 P-N3 27 R-R7 P-R4 17 B-Q4 B-K4 28 P-R3 P-Q4 18 0 -0 29 P-K5 N-K5

Now White has time to castle, but This knight dominates the game Black enjoys a slight initiative. and White cannot exchange it be­ cause of his weak QBP.

30 P-R4 Q-Q5 31 R

18 ... BxB 19 N*B Q-K4 20 N-B3

161 PORTOROZ/LJUBLJANA 1975

The turning point of the game. White wants to he the first to Black's chances are better but his mate, but had Black not been in time first task is to exchange a pair of trouble, lie would have been second. rooks: 32...R-Q1 was indicated. He under-estimated the sacrifice of the 38 ... R-QB6? exchange, which completely changes the character of the game. Black wins with 38...Q-Q8! 39 B- 0 3 RxBPeh 40 BxR Q-KB8ch 41 K- 32 ... N-B4?! R2 R-B7ch elc. Now the game is a 33 R*N! RxR forced draw. 34 P-B5! 39 B-Q3 Q-K5ch Suddenly the black king is in 40 QxQ PxQ danger: 34,..KPxP is no good, be­ 41 BxP R-K6! cause of 35P-K6! 42 B-Q31 R(B1)-B6 34 ... R-KB1 35 P*NP P*P Not 42...RxKP because of 43 R- 36 Bxp Q-N5 QN7 R-K6 44 R-KR7ch and White is better. Black has to play very exactly. 43 R-KR7ch K-Nl 37 B-R7ch? 44 RxP RxNPch 45 Drawn The first mistake: necessary was 37 QxQ pxQ 3 8 p.R5 R(B1)-B1 39 P-R6 RxPch, with a drawish ending. GAME 100 37 ... K-Rl 38 Q-K3? White: Ribli Black: Karpov

Queen’s Indian Defence

1 P-QB4 N-KB3 2 N-KB3 P-QN3 3 P-KN3 B-N2 4 B-N2 P-K3 5 0 -0 B-K2 6 P-N3 0 -0 7 B-N2 P-B4 8 N-B3 P-Q4 9 PxP NxP 10 Drawn

162 ROUND THIRTEEN

GAME 101

While: Gligoric Black: Ljubojevic

Albin Counter Gambit

Notes by Gligoric

1 P-Q4 P-Q4 2 P-QB4 P-K4

A surprise, but not an unpleasant one, because this defence gives White more .winning chances than with most solid openings. I had some successes against this gambit in the G ligorie pasl, particularly during the years just after the war.

3 PxKP P-Q5 I captured this pawn only after 4 N-KB3 N-QB3 some reflection. I considered 8 0-0, 5 P-KN3 B-K3 thereby gaining a tempo for the control of K4 by my pieces, but as a This move was played after about matter of principle I decided to take half an hour’s thought, so obviously the pawn. Ljubojevic was improvising at the board. 8 ... NxP 9 0 -0 B-KR6 10 N-N3 6 QN-Q2 Q-Q2 I think that the normal plan of P- After 6...B-QN5 7 B-N2 B*P 8 R3. P-QN4 and only then N-N3 0 -0 White is clearly better, or even might be too slow here. simply 7 P-N3. 10 ... Q-0-0 7 B-N2 P-B3 II B-NS

A good move, but also possible is 11 1 have never seen this move before. P-K3. and if 11...P-Q6 12 N(N3>- Q4, and White wins another pawn 8 PxP but Black gets some counterplay,

163 PORTOROZ/LJUBLJANA 1975 though probably not enough. N(N3)xR NxN 18 RxN Q-B4, with Now 12 P-K3 is a threat. some compensation for the pawn, e.g. 19 KR-Q1 (Threatening R-Q5 11 ... Q-N5 followed by P-B5.) 19...QR-K1 with 12 Q-Q 2 some play.

Intending 13 Q-B4. 17 QxRP

12 ... B-Q3 From here my queen controls all 13 BxN P*B the important light squares. 14 Q-R6 BxB 15 KxB 17 ... RxP 18 P-KR3

There is no good square for Black’s queen, c.g, 18...Q-K5 19 QxQ RxQ 20 KR-K1, or 20 N-Bl followed by N-Q3; in each case with a won ending.

18 ... Q-Q2 19 QxQch RxQ 20 N(B3)xp NxN

Or 2()...RxNP 21 NxN PxN 22 I RxR KxR 23 R-Q1ch and 24 R-Q2 ! winning. My K-sidc is quite safe, and Black’s only chances lie in pressure 21 NxN RxNP along the K-file. 22 KR-K1! R-Ql

15 ... KR-K1 If 22...RXRP 23 R-K8ch R-Ql 24 16 QR-Ql RxRch KxR 25 N-K6dbl ch K-K2 26 Nxp and White will win, or 26 NxB I thought that after 16 KR-K1 B- KxN 27 R-Q7, also with a win. N5 17 N(N3)-Q2 BxN 18 QxB R-K5. Black would have sufficient counter­ 23 N-K6 RxR play. but maybe I waswrong. j If 23...R-K1 24 NxB RxN 25 R- 16 ... B-Bl? K7.

The best chance was 16...RxP 17 24 RxR B-Q3

164 ROUND THIRTEEN

Hoping for 25 P-B5 B-K2 when my GAME 102 QBP would he weak. White: Kantar 25 P-KR4 Black: Bade

Reti Now Black has no time for ...RxRP, and if 25.. .R-K7 26 N-N7 Notes by Barle and 27N-B5. 1 N-KB3 P-Q4 25 K-Q2 2 P-KN3 P-QB3 26 N-N7 K-K2 3 B-N2 N-B3 27 N-B5eh K-K3 4 0 -0 B-B4 28 N*B PxN 5 P-Q3 P-K3 29 P-R5 RxRP 6 QN-Q2 B-K2 30 P-R6 K-B2 7 P-N3 0 -0 31 RxP 8 B-N2 P-KR3 9 P-B4 QN-Q2 The ending is an easy win. 10 0*B2 B-R2 11 QR-B1 P-QR4 31 K-N3 12 P-QR3 B-Q3 32 P-R7 KxP 33 RxP K-N2 Perhaps 12...B-QB4 was better. 34 R-Q6 R-N7 35 P-B5 P-R4 13 PxP KPxP 36 P-B6 pxp 37 RxP P*R5 Also possible was 13...BPXP 14 P- 38 R-QR6 R-R7 K4, with a slight advantage for 39 P*N4 White. ~

39 K-B3 first is more precise be- 14 N-Q4 Q-K2 cause now Black could play 39...R- R6, although 40 P-B4 would still win. Probably better was I4...Q-N3. followed by 15...P-B4 39 P-R6 40 K-N3 R-R8 15 R-Rl N-B4 41 K-B4 K-B2 16 N(Q2)-B3 N(B3)-Q2 42 K-B5 K-K2 17 B-B3 N-K3 43 P-N5 R-R7 18 0-N2 NxN 44 P-B4 R-R8 19 BxN P:B3 45 K-N6 Resigns 20 B-B3 KR-K1

165 PORTOROZ/LJUBLJANA 1975

21 KR-K1 N-K4 22 P-Q4?

A bad move which gives Black some reason to play for a win. The position is still nearly equal, however.

22 ... N-N5

Hoping for 23 P-R3?? NxP!

23 P-K3 P-R4 24 P-N4 PxP 25 PxP B-Q6 42 BxN?? 26 R-R5 P-QN3 27 RxR RxR The decisive mistake: the queen 28 N-Q2 P-QN4 ending is lost for White. After 42 P- 29 P-K4 P-KB4 N4 White’s position would certainly 30 P-K5 B-B2 not be weaker.

And not 30...R-R5? 31 P-R3 N-R3 42 ... PxB 32 R-K3, winning a piece. 43 Q-K2 BxN 44 NPxB Q-KB2! 31 N-N3 P-R5 32 R-R1 RxRch The queen is very well placed here 33 QxR PxP both for attack and defence. 34 BPxP B-N3 35 N-B5 45 QN4ch K-R2 46 P-R4 P-N5 Not 35 Q-R8eh K-R2 36 Qxp 47 P-R5 P-N6 QXKP and wins. 48 P-K6 Q-KN2! 49 Q-B5eh K-Nl 35 Q-N4 50 K-N2 P-N7 36 0-K1 B-K5 51 P-K7 QxKP 37 B-Q2 Q-R4 52 Q-QB8ch Q-Bl 38 P-R3 N-R3 53 Q-K6eh K-N2 39 N-K6 Q-B2 54 Q-K5ch K-R2 40 N-B5 Q-R2 55 Q-B7eh K-Nl 41 BxB BPxB 56 Resigns

166 ROUND THIRTEEN

GAME 103 21 N-R4 NxN 22 RxN KR-K1 White: Portisch 23 R-B7 P-QN4 Black: Furman 24 N-N6 R-N1 25 P-K3 R-K4 Queen’s Indian Defence 26 R-Ql K-Bl 27 R(Q1)-QB1 R-K3 1 N-KB3 N-KB3 28 N-Q7ch NxN 2 P-B4 P-B4 29 RxN R-QB3 3 N-B3 P-K3 30 RxR BxR 4 P-KN3 P-QN3 31 R-B7 R-N3 5 B-N2 B-N2 32 B-R3 B-Kl 6 0 -0 B-K2 7 P-Q4 pxp 8 Qxp 0 -0 9 R-Q! P-Q3 10 B-N5 QN-Q2 11 N-N5 P-Q4 12 PxP PxP 13 Q-KB4 N-B4 14 N(B3)-Q4 N(B3)-K5 15 BxB QxB 16 QR-B1 P-QR3 17 N-QB3 QR-Q1 18 P-QN4 N-K3 19 Q-K5 Q-B3 20 QxQ NxQ 33 B-B8 P-Q5 34 PxP R-Q3 35 P-QR3 RxP 36 BxP R-Q3 37 B-N7 R-Q6 38 R-B8 K-K2 39 R-R8 B-Q2 40 K-Bl B-K3 41 B-B6 B-B5 42 K-N2 R-Q3 43 R-K8ch K-B3 44 B-B3 R-Q6 45 R-K3 R-Q7

167 PORTOR OZ/L.I U D L.I A N A 19 75

46 B-IC4 P-R3 3 P-B4 P-QN3 47 B'B6 R-R7 4 P-KN3 B-N2 48 R-QB3 R-N7 5 B-JN2 B-K2 49 R-K3 R-R7 6 N-B3 N-K5 50 P-KR4 P-N4 7 Q-B2 NxN 51 PxPch pxp 8 Q*N 0 -0 52 R-QB3 R-N7 9 0 -0 P-QB4 53 Drawn 10 B-K3 P-Q3 11 pxp NPxP GAME 104 12 KR-Q1 Q-B2 13 R-Q2 N-Q2 While: Overman 14 N-Kl BxB Black Parma 15 N*B KR-(.)1 16 Oueen’s Indian Defence R

168 ROUND FOURTEEN

ROUND FOURTEEN

June 19th

White Black Opening Result Moves 105 Ga rcia <4i> Parma (7j) Ruy Lopez H 19 106 Furman (8) Osterman (3£) English Opening 1-0 36 107 Bade (7) Portisch (6J) Vienna Opening 0-1 27 108 Ljubojcvic (7) Karnar (2|) French Defence 1-0 40 109 Karpov (10) Gligoric (9) Ruy Lopez H 27 110 Hon <*£) Ribli (8) English Opening H 14 111 Musil (4) VI ariotti (5§) Alekhine's Defence H 16 112 Velimirovic 17) Planinc (5|) Owen's Defence 0-1 37

In comparison with the previous rounds the public had no reason to be satis­ fied. [he participants were now beginning to think about their final placing*, some were tired and others knew that they could not improve their position at all. Both players were without ambition in the game Musil-Mariotfi, Hort and Ribli decided not to risk much and the same can be said of the game Garcia- Partna. although it lasted a little longer. Karpov tried a new idea against Oliguric in the Ruy Lopez, but Black con­ solidated his position correctly and White had nothing in the final position. Ljubojcvic and Furman had comparatively easy wins against Karnar and Osterman; both Slovenians were in weak form and were strategically inferior in both games. Portisch had a nice win with Black against Baric, who played the King's Gambit. Baric remembered his game against Marioiii and the position looked? tor him. Alter 0 -0 -0 lie was happy because theory says ...P-B4 is better, but alter P-KM he started to have problems and after ...N-B4 it was clear that Black had compensation in White's exposed king. Portisch played the final parr brilliantly and ir was a pity that he started to play his best chess so late. This game was undoubtedly the best of the round as Velimirovic and Planinc were tar irotn having their besr day. Black gni quite a good game from the double liancheiroU) and the game was decided on the O-side where Velimirovic sacrificed first a pawn and later a queen for a rook. After ... K-Q2 White had no resources to support his attack. Velimirovic played R-Rl ? and that resulted in the loss of further material but he continued the game because Planinc was in time trouble even though a piece against a queen was not good enough.

169 PORTOROZ/LJUBLJANA 1975

GAME 105 5 B-N2 0 -0 6 0 -0 R-Kl White: Garcia Black: Parma Trying to preserve his dark squared bishop, but the defence is Ruy Lopez easier after 6.. .P-K5 and 7 ...BxN.

1 P-K4 P-K4 7 N-Q5 B-Bl 2 N-KB3 N-QB3 3 B-N5 P-QR3 After 7...NxN 8 P*N N-Q5 9 NxN 4 B-R4 N-B3 P*N 10 P-K4, White has the better 5 0 -0 B-K2 prospects. 6 R-Kl P-QN4 7 B-N3 P-Q3 8 P-Q3 P-KR3 8 P-B3 0 -0 9 P-K4 P-03 9 P-KR3 N-Nl 10 P-KR3 10 P-04 QN-Q2 11 QN-Q2 B-N2 Not only preventing ...B-N5, but 12 B-B2 R-Kl also preparing B-K3. 13 N-Bl B-KB1 14 N-N3 P-N3 10 ... P-QR4 15 P-QR4 B-.N2 11 B-K3 B-Q2 16 B-N5 P-R3 17 B-Q2 P-B4 11 ...NxN was better. 18 P-Q5 N-N3 19 P-R5 Drawn

GAME 106

White: Furman Black: Ostcrman

English Opening

Notes by Furman

1 P-QB4 P-K4 2 N-QB3 N-QB3 3 N-B3 N-B3 4 P-KISI3 B-N5 12 N-B3!

170 ROUND FOURTEEN

.*'• Q.

Furman vs. Osterman

White now avoids the exchange of 16 ... P*P knights, and, by protecting the KP, 17 P-B5 P-N4?! prepares to advance in the centre. Black shies away from passive 12 ... N-K2 defence, bur he only creates fresh 13 P-Q4 N-N3 weaknesses in his own camp. 14 P-N3 Q-Nl 15 Q-B2 P-B3 18 PxPe.p. P-B4 16 PxP! 19 N-Q2 QP 20 N-B4 Q-B2 Due to the weakness at QN6 this 21 KR-Q1 B-B3 exchange of pawns guarantees White 22 N-Q5 B*N a definite advantage. 23 PxB P-K5

171 PORTOROZ/LJUBLJANA 1975

24 P-Q6 This energetic move finally breaks down the defence. White's passed pawn is now very strong. 32 PxP 33 pxp QR-Qi 24 ... Q-B3 34 P-N5 R-Q2 25 R-Q2 N-Q2 35 Q-B4 N-R4 26 P-QR4 36 B-K3 Resigns

Fixing the weak QRP and ruling In view of the decisive loss of out counterplay from a possible ...P- material. R5.

26 ... P-B4 27 QR-Q1 N(N3)-K4 GAME 107 28 NxN White; Barie The most accurate. After 28 B-B4 Black: Portlsch N-B2 Black has good defensive chances. King's Gambit

28 ... RxN Notes by Portisch 29 Q-B4di K-R2 30 B-B4 R

32 P-KN4! 9 ... P-KN4

172 ROUNDFOURTEEN

Almost the only move that lakes 14 N-B3 B-R3 the initiative. If 9...P-B4 10 P-KR3. Now Black gets good compensation Another good variation though one for the pawn. which is less clear is 14...N-R4 15 N- KR4 NxB 16 NxQ NxQ 17 NxN(K5) 10 NxP NxN 18 NxP N-R5, when White has rook and two pawns for two pieces. If Forced. If I0B-N3 P-B4! Black can then blockade the dark squares he will have the advantage, 10 ... N-B3 but P-K5 is always in the air.

A simple developing move that 15 BxB OxBch carries many threats, e.g. .. .B-R3. 16 K-B2 KR-N1

11 P-KR3 B*B Black's play along the open lines 12 Q*B Q-N3 gives him full compensation for the pawn. Not 12...B-R3 13 QxQ NxQ 14 P- KN3, with a dear advantage to White. 17 KR-KN1 K-Nl

A useful move that defends the important square QR2 and thereby makes Q-K3 no threat. If 17...R-N3 (threatening 18...R(Q1)-N1) 18 NxN PxN 19 Q-K3 Q-RSch 20 K-K2, and Black has no rime for 20...R-N6 21 Qxp NxKP because of 22 Q-R8ch K- 02 23 Q-R4ch winning apiece.

18 0-Q2 Q-N3 19 Q-B4 N-R4

Sacrificing a second pawn, but 13 P-05 quite sound.

Forced. Black was threatening 20 NxN 13...B-R3 and White must block the centre because in many cases ...P-Q4 If 20 Q-BS Q-N6eh followed by is a serious tli reat. ...N-KB5 withabcastly attack.

13 ... N-K4 20 ... PxN

173 PORTOROZ/LJUBUANA 1975

21 QxKP R(Q1)-K1 27 ... QxR 28 Resigns 2l...Q-N3eh drives the white king to a safer square.

GAME 108

While: Ljubojcvic Black: Karnar

French Defence

l P-K4 P-K3 2 N-KB3 P-Q4 3 N-B3 N-KB3 4 P-KS N(B3)-Q2 5 P-Q4 P-QB4 6 pxp Bxp 7 B-Q3 N-QB3 22 Q-Q4 N-N6 8 B-KB4 B-K2 23 QR-K1 N-B4! 9 P-KR4 N-B4 24 Q-Q3 10 P-R3 NxBch 11 QxN B-02 If 24 0-B5 P-N3 25 Q-B4 Q-N6ch 12 N-K2 Q-N3 26 K-R2 Q-K6ch 27 K-Ol QxR(N8). 13 P-QN4 P-QR3 I had seen this variation when 1 14 P-B3 R-QB1 played my 21st move. 15 0 -0 Q-Oi Or 24 Q-Q2 (besl) 24...Q-N3eh 25 16 P-N3 N-Nl K-K2 R-N6 (threatening 26...Q*P) 17 N(K2)-Q4 B-R5 26 P-N3 N-05ch 27 K.-Ql N-B6 28 18 B-JN5 N-Q2 PxN RxR 29 RxRQxRch. and White 19 KR-K1 N-N3 has insufficient compensation for the 20 BxB QxB exchange because Black's rook is so 21 N-KN5 P-R3 active and White has weak pawns. 22 N(N5)-B3 Q-B2 23 0R-B1 N-B5 24 ... Q-N3ch 24 Q-K2 B-N4 25 K-K2 R-N6 25 0-R2 0-Q2 26 Q-B4 Q-K6ch 26 N-Q2 N-N3 27 K-Q1 27 Q-B2 N-R5 28 R-K3 R-B2 If 27 K-Bl R-B6ch and mate next 29 P-KB4 P-KN3 move. 30 P-R5 R-Nl

174 ROUND FOURTEEN

31 pxp pxp 7 B-N3 P-Q3 32 N(Q2)-B3 N-N3 8 P-B3 0 -0 33 Q-KR2 N-B5 9 P-KR3 N-Nl 34 R(K3)-K1 R-Rl 10 P-Q4 QN-Q2 11 0N-Q2 B-N2 12 B-B2 R-Kl

I usually play 12...P-B4, but here 1 decided to allow P-QN4 because latest theory shows that black can hold the position.

13 N-Bl

Played at once, without even con­ sidering 13 P-QN4.

13 ... B-KB1 35 N-N5 R-B3 14 N-N3 P-N3 36 Q-R3 K-K2 15 P-QR4 37 NxRch BxN NxRP 38 N-B3 Up to this point Karpov had been 39 Q-R4ch K-Kl playing very quickly. The text move 40 Q-B6 Resigns was also played in the game Garcia- Parma in the same round. Garcia might have been following Karpov, GAME 109 but Parma had his back to our board and replied 15...B-N2 which is a less While: Karpov accurate defence because White can Black: Gligoric attack the ONP and provoke ...P- QB3 which would leave Black's OB Ruy Lopez passively placed.

Notes by Gligoric 15 ... P-B4 16 P-Q5 1 P-K4 P-K4 2 N-KB3 N-0B3 Now, by transposition, we have 3 B-N5 P-QR3 reached a well-known position. See, 4 B-R4 N-KB3 for example, my game against Gellcr 5 0 -0 B-K2 and Kavalek at Wijk aan Zee 1975 6 R-Kl P-QN4 where 1 played 16...P-B5!?

175 PORT OR 0 7 / LJUBLJANA 1975

16 ... N-N3! 17 ... P-B51

After me game Karpov reminded White has slowed down his me that this had been played, against development and so his plan of him by Porlisch at Madrid 197.1. 1 simultaneously attacking on both think that it is belter than 16...P-B5 wings cannot be effective any more. which obliges Black to defend on The text compels White to try to both flanks too soon. For example. open t he posit ion. White can continue B-N5. R-R3, Q- Q2 and KR-Q1. 18 P-R5 N(N3)-Q2 19 P-N3 17 N-Q2 A natural move.

19 ... P*P 20 BxP

Now White threatens 21 P-QB4, Also possible is 20 NxP R-Bl 21 R- K3 trying to keep control of QB5 and postponing the fight for QB4 for a later stage of the game.

20 ... N-B4 21 B-B2 B-Bl An innovation prepared by Karpov 22 B-K3 Q-B2 after his game with Portisch. It is a 23 B-N4 strange looking move hm it contains

the clear strategic idea of lighting for ! 23 Q-B3 js also playable. the square QB4 with more vigour. 23...B-KN2 24 Q-K3 B-Q2 25 B*N The Karpov-Portisch game went 17 \ P*B 26 P-QB4, Black can hold the P-R5 N-B5 18 P-N4. and although position with .. KR-QB1. ...N-K1 White was slightly better the game and ...N-Q3. was drawn. Also possible is 17 P-N3. threatening P-R5. bin Black replies 23 ... B-Q2 17.. PxP 18 P*P P-QR4L followed by 24 Q-B3 B-N2 ...B-QK3 and maybe ...P-B5. so 25 B-Q3 White never gets control of his QB4 square. Intending P-B4. ROUND FOURTEEN

The Karpov-GIigoric game in progress.

25 ... NxB 26 QxIN R(K1)-QB1

lmending to keep the other rook for the QN-filc, in case the QB-file is opened. Also, 26...QR-B) can be met by Q-K3-N6.

27 QR-B1 N-Kl 28 Drawn

White is slightly better but he cannot improve his position, e.g. 28 P-QR4 PxP 29 RxP B-N4! with a very good game.

177 PORTOROZ/UUBLJANA 1975

GAME 110 13 N-K2 B-N5 14 P-B3 B-R4 White: Hort 15 K-B2 B-N3 Black: Rihli 16 BxB RPxB 17 Drawn English Opening

1 P-0B4 P-QB4 4 N-QB3 P-KN3 3 P-KN3 B-N2 GAME 112 4 B-N2 N-QB3 5 P-K3 P-K3 While: Velimirovic 6 KN-K2 KN-K2 Black: Planinc 7 0 -0 0 -0 8 P-Q4 PxP Owen’s Defence 9 NxP P-Q4 10 PxP NxP Notes by Parma 11 N*N(Q5) NxN 12 PxN PxN 1 P-K4 P-QN3 13 B-K3 B-K3 2 P-Q4 B-N2 14 Q-N3 Drawn 3 B-Q3 N-KB3 4 P-KB3

GAME 111 White can play 4 N-QB3 P-K3 5 P- QR3 P-B4 6 N-B3, transposing to the White: Musi) Sicilian Defence, but after 6 . P*H 7 Black: Mariotti Nxp B-B41 8 N-N3 B-K2 (Parma- Sahovic, Yugoslavia 1975) White Alekhine’s Defence does not have very much.

1 P-K4 N-KB3 4 ... N-B3 2 P-K5 N-Q4 3 N-QB3 P-K3 Very original in this position — 4 NxN PxN Black pieces fight against White's 5 Q-B3 P-QB3 central pawns. 6 P-Q4 P-Q3 7 Q-KN3 pxp 5 P-B3 P-K4 8 QxKPeh 0-K2 6 P-Q5 9 OxQch BxQ 10 B-Q3 0 -0 White cannot play 6 N-K.2. 11 B-KB4 B-B3 because aflcr 6...P-Q4 Black has the 12 P-QB3 R-Klch initiative.

178 ROUND FOURTEEN

11 B-QB4 P-QN4 12 B-N3 P-B4 13 P-QR4?

13 P-QR3 is passive but at this moment White has to think about equalizing.

Pla nine

6 ... N-QN1 7 B-K3 13 . . . PxNP Another possibility was 7 P-QB4, 14 RPxP N-B4 but Black places his pieces as 15 PxP NxB follows: bishop on B4. pawn on QR4, 16 QxN QxP knight on QR3 and after that ...P- 17 QN-B3 QB3 with good counterplay. After 17 B-Q2 the black position is 7 ... N*R3 better, but White is not ... a pawn 8 N-K2 P-B3 down. 9 PxP? 17 QxP Better is 9P-QB4 N-B4 10QN-B3. 18 Q-R2 B-B3 19 R-ONl Q-R6 9 ... PxP 20 Q-B4 R-Bl 10 P-QN4?! 21 K-B2 B-Q2 22 QxRch? After 10 0 -0 N-B4 11 B-QB2, the position is equal. White did not like to play this position a pawn down and tried a 10 ... 0 -0 2 queen sacrifice which was not at all

179 PORTOROZ/LJUBLJANA 1975 correct. Now White has a rook for 26 R-QB1 B-Q3 the queen and that is all. 27 NxB QxR 28 N-QB4 K-K3 22 ... BxQ 29 P-N4 B-Q2 23 R-N8 K-Q2 30 P-N5 N-R4 24 N-N5 31 N-N6 B-N4 32 N-B3 N-B5 If 24 K-Qlch K-B2 25 R-R8 K-N2 33 R-QNl Q-B2 26 RxPeh Q*R, and Black has an 34 N(N6)-Q5 NxN extra piece. 35 PxNeh K-B4 36 R-QB1 R-QB1 24 ... Q-N6 37 N-K2 BxN 25 R-Rl P-QR3 38 Resigns

180 ROUND FIFTEEN

ROUND FIFTEEN

J11 ne 2 i st

White Black Opening Resnlt Moves 113 Planinc (6J) Garcia (5) King’s Indian Rev. 0-1 38 114 Mariotti (6) Velimirovic (7) Sicilian Defence 0-1 50 115 Ribli (8J) Musil (4|> English Opening 1-0 60 116 Gligoric (9|) Hort (9) Queen’s Gambit Dec. H 12 117 Karnar (2^) Karpov <10*) Reti H 41 118 Portisch {1\) Ljubojevic 1.8) Modern Defence 1-0 27 119 Osterman (3j) Baric (7) Queen’s Indian Def. H 11 120 Parma (8 > F urman (9) Ruy Lopez H 17

Hie last round of the Vidmar Memorial started at 10 a.m. and it is a fact that many Grandmasters arc normally asleep at that time. The round started peace­ fully with a draw between Osterman and Barle; Baric needed a half point to fulfil the FIDE requirements for the first part of an International Master title. Another draw was agreed by Gligorie and Hort; for Gligoric this meant second place and Hort was so tired in the final rounds that he was also glad. Nobody expected, however, that Karpov w'ould give a draw to Karnar, but the surprise happened because Karpov only had a microscopic advantage and Karnar avoided ma king a mistake during the 41 move game. A draw was agreed in a totally equal position. The game Parnia-Furman was also a draw and this meant that Parma finished the tournament unbeaten. Furman can remember the many adventures he had in Portoroz and Ljubljana with mixed feelings. In (his round it was the Hungarians who scored two important victories. Port is eh beat Ljubojevic very1 easily. Ljubojevic, as Black, lost the exchange and resigned after 27 moves. 1 would advise him to take a three week holiday on a sunny beach tit is what I need and will do myself) then he will regain his intuition for the right moves. Ribli was a professor in comparison to Musil, who was losing lime, terrain and finally a pawn. The rook ending was too easy for the Hungarian Grand­ master. who tied for third place. Ribli was unbeaten in the tournament and his chess had been as expected, "easy’’, theoretically well grounded and very (rieky.

181 PORTOROZ/LJUBLJANA 1975

GAME 113 22 P-B4 N-B3 23 B-B3 P-B3 White; Planlnc 24 N-N3 Q-B2 Black: Garcia 25 P-B5 N-B4 26 0-N2 B-Rl King’s Indian Reversed 27 P-R3 R-Q2 28 R-Rl RxP 1 P-K4 P-K4 29 RxB RxR 2 N-KB3 N-QB3 30 NxP PxN 3 P-Q3 N-B3 31 BxN RtRll-Ql 4 QN-Q2 P-KN3 32 BxNP R-Q8 5 P-B3 P-Q4 33 B-B6 RxRch 6 P-QN4 P-0R3 34 BxR R-Q8 7 B-N2 B-N2 35 K-Bl NxPeh 8 P-QR3 0 -0 36 K-N2 P-K5 9 Q-B2 R-Kl 37 Q-B2 Q-B6ch 10 P-N3 P-N3 38 K-R2 RxB 11 B-N2 B-N2 39 Resigns 12 0 -0 Q-Q2 13 PxP NxQP 14 QR-Q1 QR-Q1 15 KR-K1 N{Q4)-K2 GAME 114 16 N-B4 N-B4 17 Q-N3 K-Rl White: Mariotti 18 P-0R4 P-QN4 Black; Velhnirovie 19 PxP PxP 20 N

1 P-K4 P-QB4 2 N-KB3 N-QB3 3 P-04 PxP 4 NxP P-KN3 5 N-QB3 B-N2 6 B-K3 N-B3 7 B-K2 0 -0 8 0 -0 P-Q3

A very well known position has arisen. Black could equalize immedi­ ately with 8...P-Q4 e.g. 9 PxP NxP

182 ROUND FIFTEEN

10 NxN(Q5> N*N 11 BxN QxN 12 K2 White's Q-side majority can be BXB QxQ 13 KRxQ RxB 14 B-B3 B blocked. Black is also left with a B4 15 P-B3 OR-Q1, but his “good” knight against white’s “had” ambitions are greater. bishop.

9 Q-Q2 B-Q2! 21 . ,, BxBch 22 KxB N-N3 Aiming to play against White's 23 RxRch RxR KP. The theoretical continuation 24 P-QN3 K-K2 9.. .N-KNS is all right for Black after 25 R-Ql RxR 10 BxN BxB 11 P-B4 NxN 12 BXN P- 26 BxR K4! However, White can play 11 N- Q5 or 11 P-KK3 B-Q2 12 QR-Q1 followed by P-KB4, with active play.

10 P-B4 NxN 11 BxN B-B3 12 B-B3

If 12 P-K5 then 12...N-K5 13 NxN (13 Q-K3 is weak because of 13.. .PXP 14 PxP B-R3! 15 Q-Q3 N- N4 [intending 16...N-K3( 16 B-N4 B- N2 17 QR-Q1 P-KR4, and Black’s position is better.) 13...BxN 14 QR- An interesting endgame has been Q1 PxP 15 PxP Q-Q4 16 P-B4 Q-K3 reached. At a first glance it would 17 Q-B4 B-QB3 18 P-QN3 P-B3 19 seem that While’s bishop is stronger B-N4 P-B4, etc. than the Black knight. White threatens B-N4, aiming to transpose 12 P-K4 into a very favourable pawn ending, 13 PxP Pxp owing to his Q-side majority. Also, 14 B-K3 QxQ White has the possibility of placing 15 BxQ N-Q2 his bishop on QN3 after P-B3 and P- 16 B-K3 KR-Ql QN4, activating it along the QR2- 17 KR-Ql B-B1 KN8 diagonal. 18 N-Q5 B-B4 Black does, however, find a very 19 K-B2 K-B1 good reply which simultaneously 20 R-Q2 BxN prevents both White continuations 21 RxB while at (he same time creating active play tor himself in the shape of a 21 pxB is weaker, as after 21 ...K- central passed pawn.

183 PORTOROZ/LJUBLJANA 1975

26 ... P-B4 33 P-KK3? 27 P-N3 White does not seem to notice that If 27 PxP then 27...N-Q4ch his position is weakening. 33 P-B4 followed by 28...PxP is excellent for was an absolute necessity as after black. 33- .N-B3ch 34 K-Q3 P-K5eh 35 BxP 27 ... N-Q2 NxP 36 P-KR4 M-K4ch 37 K-Q4 P- 28 B-B3 P-N3 B6 38 P-B5 PxPch 39 KxP Black 29 PxP PxP cannot win even though he can force 30 P-KN4! the win of a piece. 39 PxP? gives Black good chances of winning after White quickly plays to undermine 39.. .P-B7 40 B-N2 N-B6eh: the move Black’s centre. 30 P-B4 is weaker actually played allows Black to because of 30...N-B3 and after 31 P- blockade the Q-side majority, alter QN4 Black would play 31...K-Q3 which White’s position becomes very threatening ...P-K5and ...K-K4. difficult.

30 ... P-B5ch! 33 ... P-N4!

For his part. Black is not satisfied Not 33...N-B3ch 34 K-Q3 N-Q4? with the draw that would arise after as then White wins after 35 BxNch 30...PxP 31 BxP N-B3 32 R-B5 K-Q3 KxB 36 P-B4ch K-K3 37 P- KR4. 33 P-B4 K-B4 34 P-QR3 P-QR4 35 K-Q3 P-R3 etc. He correctly realises 34 K-Q3 that his central pawns give him. apart from a headache, chances of An interesting but insufficient playing for a win. defence is 34 B-K2; after 34...N- B3ch 35 K-B3 N-Q4 36 BxP! (36 P- 31 K-K4 K-K3 QR3 is weaker because of 36...N- 32 P-N4 P-KR3 B6.) 36...P- K5ch 37 KxP N-B6ch 38 KxP N-B6ch 38 KxP NxB, the black knight is stronger than the white pawns. Also 34 P-N5 is no good, as after 34.. .PxP 35 R-N4ch K-Q3 36 K-B5 P-K5 37 KxNP P-B6 38 K-B4 N-B3, Black wins.

34 ... N-i\3 35 P-R3

This loses a pawn, but White is

184 ROUND FIFTEEN lost anyway, e.g. 35 B-B6 N-Q4 36 P- GA ME 1.15 K3 P B6 37 BxP P-K5ch 38 KxP N- B6ch 39 KxPNxB, and Black wins; or 35 P-KR4 N-B5 36 B-B6 N-Q3 37 B- White: Ribli B3 K B3 38 B-N2 K-N3 39 B-B3 P- Black: Musil KR4! 40 PxPch (Or 40 P-N5 K-B4 41 BxP P'-KSch 42 K■Q4 P-B6 43 K-K3 English Opening N-B5ch 44 K-Q4 K:-B5 45 P-N6 N-Q3 or 44 .K-B2 K-B5 45 P-N6 P-K6ch 46 K-Nl N-K4 and ... P-K7 etc.) 40...K- 1 N-KB3 N-KB3 B441 P-R6 K-N3 and Black wins. 2 P-KN3 P-B4 3 B-N2 P-KN3 4 P-N3 B-N2 35 N-B5 5 B-N2 0 -0 36 B-B6 NxP 6 P-B4 N-B3 37 P-R4 P-R3 7 0 -0 P-N3 38 B-N7 N-B5 8 P-Q4 PxP 39 BxP? 9 Nxp B-N2 10 N-QB3 Q-Bl Losing a piece, but after 39 B-B3 1! R-Bl NxN N-Q3 40 B-B6 K-B3 41 B-B3 P-KR4, 12 QxN BxB Black wins as a bo ve. 13 KxB Q-B3ch 14 P-B3 KR-Bl 39 N-Q3 15 N-Q5 0-K3 40 Bxp 16 P-K4 N-Kl 17 0 -0 2 N-B3 18 N-B4 Q-B3 Instead of resigning. The answer 19 KR-Q1 B-R3 to40:P-B4 is 40...,P-K5ch etc. 20 BxN QxB 21 N-Q5 BxQ 40 NxB 22 NxOch PxN 41 P-B4 N-Q3 23 RxB R-B2 42 PBS P-K5ch 24 R(B1K>1 R-Ql 43 K-Q4 P-K6 25 R-Q6 K-Bl 44 K-Q3 N-N4 26 RxBP P-QN4 45 P-N5 PxP 27 PxP R-B7ch 46 PxP K-B4 28 K-R3 RxQRP 47 P-N6 KxP 29 P-K5 K-K2 48 P-B6 K-B4 30 R(B6)-Q6 R-R6 49 P-B7 Nxp 31 R(Q1)-Q3 F-R4 50 P-N5 NxP 32 R(Q6)-05 R-R7 51 Resigns 33 P-B4 P-KR4

185 PORTOROZ/LJUBLJANA 1975

GAME 116

White: Gligoric Black: Hort

Queen’s Gambit Declined

1 P-Q4 N-KB3 2 P-QB4 P-K3 3 N-QB3 P-Q4 4 N-B3 P-B4 5 P-K3 N-B3 6 PxBP BxP 7 P-QR3 PXP 8 QxQch KxQ 34 R-B5 R-K7 9 Bxp K-K2 35 R-B7 R-R7 10 P-QN4 B-Q3 36 R-N7 K-Kl 11 N-QN5 B-Nl 37 R-Q6 K-K2 12 B-N2 Drawn 38 R-R6 R-N7 39 R(R6}xRP RxNP 40 R-R2 R-Q6 GAME 117 41 P-N6 R-QB6 42 R-B7 RxR White: Kamar 43 PxR R-QB1 Black: Karpov 44 R-QB2 K-K3 45 K-R4 P-B3 R eti 46 PxP KxP 47 P-R3 K-B4 1 P-KN3 N-KB3 48 R-B5ch K-B3 2 BM2 P-Q4 49 P-N4 pxp 3 P-QB4 P-B3 50 PxP R-KRlch 4 P-N3 B-B4 51 KM3 R-QB1 5 N-KB3 P-K3 52 K-B3 K-K3 6 0 -0 P-KR3 53 K-K4 K-Q3 7 B-N2 QN-Q2 54 R-KN5 RxP 8 P-Q3 B-R2 55 RxPch K-K2 9 QN-Q2 B-K2 56 PM5 R-B5ch 10 B-B3 P-QR4 57 K-B5 R-B4ch 11 P-QR3 P-QN4 58 K-N4 R-B6 12 PxNP pxp 59 P-B5 R-B8 13 P-QN4 P-R5 60 R-N7ch Resigns 14 R-Bl R-QB1

186 ROUND FIFTEEN

15 B-N2 0 -0 GAME 118 16 RxR Q x R 17 Q-Rl Q-N2 White: Porlisch 18 R-Bl N-Nl Black: L jubojevic 19 R-B2 R-B1 20 Q-QB1 RxR Modern Defence 21 QxR N-Kl 22 N-Nl K-Bl Notes by Portisch 23 K-Bl B-Q3 24 B-K5 K-K2 1 P-Q4 P-KN3 25 K-Kl P-B3 2 P-QB4 B-N2 26 BxBch NxB 3 N-QB3 P-Q3 27 Q-B5 N-Q2 4 N-B3 N-Q2 28 Q-Bl P-K4 5 P-K4 P-K4 29 N(B3>-Q2 B-Nl 6 B-K2 N-R3 30 N-QB3 K-01 31 P-K3 B-K3 It is better to play ...P-QB3 before 32 N-K2 P-N4 ...N-R3, and then after 0-0 Black 33 P-R3 K-K2 can choose between ...N-R3 or 34 Q-B2 Q-N3 ...KN-B3 as in Petrosian-Ljubojevic, 35 N-QN1 P-B4 Manila 1974. In any case, I think 36 N(N1)-B3 N-B3 that this whole line is probably 37 N-Ql P-N5 unsound. 38 P-R4 N-Q2 39 N(Q1)-B3 Q-N2 7 P-KR4 P-QB3 40 Q-Bl P K5 8 P-Q5 N-B3 41 P-Q4 Drawn Rather bad. as was already shown in the game Polugayevsky-Minic, Palma Interzonal 1970.

9 P*P

Now Ljubojevic realized that if he recaptures the pawn I play 10 P-B5 and Black is in trouble.

9 ... 0 -0 10 PxP

Also possible is 10 P-R5 NxRP 11

187 PO RT O ROZ/LJ 0 BLJ A N A 1975

pxp BxP 12 B*N BxB 13 P-KN4. threatening to attack the blaclc when White wins a piece but Black knight (B-N5 and Q-Q2). Also, N-B5 gets some compensation after 13.. P- is possible in some variations. B4 14 PxP B-B5. This compensation would probably not bo enough, but 14 ... K-Rl the move in the game gives Black no 15 B-N5 N(B3)-N1 chance at all. 16 P-B5

10 ... BxP Now the struggle is completely 11 N-Q2 over.

Threatening 12P-KN4. 16 ... PxR'BP 17 PxBP P-B3 11 ... Q-Q2 12 P-R5 P-N4 So as to be able to defend the QP with a rook at Q1. 12...PxP was maybe the only way of continuing the struggle. 18 B*K3

Not 18 BxN? BxB followed by ...Q-N2. when Black has good com­ pensation for the two pawns.

18 ... KR-Q1 19 PxP N-B2 20 N-B5 Q-B3 21 Q-R4 Rxp

Or 21...NxP 22 QxQ BxQ 23 0 -0 - 0 or 23 P-R6, and the ending is quite hopeless for black.

22 Q-N3 13 P-B3 P-N5 Winning by force. Otherwise 14 P-KN4 kills Black’s knight and after 0 -0 Black has no 22 ... N-Ql play. 23 R-KN1

14 N-N3 Threatening 24 P-R6.

Winning a useful tempo by 23 ... N-K2

188 ROUND FIFTEEN

24 N-1NT5 B-QB1 10 N-Kl BxB 11 iN*B Drawn If 24...R-Q5 25NxB wins.

25 NxR QxN(Q3) 26 R-Ql Q-B2 27 P-R6 Resigns GAME 120 Because if 27...B-B1 28 R*N! QxR 29 0-B7 (threat 30 QxBPch) 29...N- White: Parma N3 30 B-QB4, mating. Black: Furman Ruj Lopez

1 P-K4 P-K4 2 N-KB3 N-QB3 GAME 119 3 B-N5 P-QR3 4 B-R4 N-B3 White: Osterman 5 0 -0 B-K2 Black; Barle 6 R-Kl P-QN4 7 B-N3 P-Q3 Queen’s Indian Defence 8 P-B3 N-QN1 9 P-QR4 B-N2 1 P-Q4 N-KB3 lfl P-R3 QN-Q2 2 P-QB4 P-K3 11 PxP Pxp 3 N-KB3 P-QN3 12 RxR BxR 4 P-KN3 B-N2 13 P-Q3 0 -0 5 B-N2 B-K2 14 N-R3 B-B3 6 N-B3 N-K5 15 N-B2 N-B4 7 Q-B2 NxN 16 N-N4 B-N2 8 QxN 0 -0 17 B-R2 Q-Q2 9 0 -0 R-K5 18 Drawn

189 PORTOROZ/LJUBUANA 1975

First prize to Karpov.

190 INDEX OF ANNOTATORS (The numbers refer to Games)

Barle: 51,62, 68, 77,102 Furman: 16, 18, 35, 52, 61,69, 91, 106 Gligoric: 6, 23, 56, 58. 101, 109 Hort: 20, 82,95,99 Janosevic: 73 Karpov: 4, 34, 48, 49, 66 Ljubojevic: 33, 63 Mariotti: 8, 26, 54, 94 Musil: 96 Parma: 27, 38,60, 87,98, 112 Portiseh: 21, 107, 118 Ribli: 10, 59, 70, 76 Velimirovic: 28, 79,97, 114

191 PORTOROZ/LJ U BLJ AN A 1975

192 INDEX OF OPENINGS (The numbers refer to Games)

Albin Counter Gambit: 101 Akkhine’sDefence: 111 Benko Gambit: 16 Benoni Defence: 5, 28, 39, 56, 57, 91 Caro-Kann Defence: 30, 64, 82 Dutch Defence: 27, 43 English Opening: 2,11, 12, 42, 55, 59, 70, 85, 106, 110, 115 French Defence: 15, 22, 74, 108 Giuoco Piano: 18 Grunfeld Defence: 1, 17, 20, 40, 65, 76. 89 Hungarian Defence: 54 King's Gambit: 77, 107 King’s Indian Defence: 10, 13, 34, 36, 58 King’s Indian Reversed: 96, 113 Larsen’s Opening: 3, 24 Modern Defence: 6, 118 Nimzo-Indian Defence: 86 Nimzowitseh Attack: 62 Old Indian Defence: 50 Owen’s Defence: 44, 112 Polish Defence: 32 I’onzianiOpenjng: 48 Queen’s Gambit Accepted: 71, 88 Queen’s Gambit Declined: 26, 31,46, 116 Queen's Indian Defence; 14, 29, 61, 100, 103, 104. 119 Queen's Pawn Opening: 92, 95 Reti: 87, 102. 117 Ruy Lopez: 19, 23, 37 , 41,52, 53, 68. 75 . 78, 90, 94, 105,109, 120 Scotch Opening: 51 Sicilian Defence: 7. 8, 9, 21. 25. 33. 35, 38, 45, 47, 49, 60, 63, 66, 67, 69, 72, 73, 79, 80, 81,83, 84, 93, 97,98, 99, 114 Slav Defence: 4 Vienna Game: 107

193 8 of the 10 Top-Rated Chess Grandmasters in the world are on the Board of Contributing Editors of the Chess division of R*H*M Press including the new world champion. Anatoly Karpov and four previous world chess champions, Boris Spassky, Tigran Petrosian, Mikhail Botvinnik and Mikhail Tal. o j are invito to subscribe to The RHM Survey of CURRENT CHESS OPENINGS Some of the advantages of our Survey: You select for pur­ chase only the Openings sections in which you have an interest. (Listol Openings on next page) Each section will be up-to-the-minute, reasonably priced, published loose-leaf style in a most attractive presenta­ tion (binder supplied with first order in any section) and will include the following: 100 most recent grandmaster games in each of the Open­ ings you choose; 4 Selected for their importance and significance from many hundreds of games in that Opening by a top international grandmaster known for his expertise in that area; 4 All games annotated by leading grandmasters, including many by the players themselves; 4 Current analysis in depth of some of the most theoretically significant games by grandmaster members of our Board of Contributing Editors, our Board having the following distinguished membership, listed alphabetically:

Board of Conlributing Editors of the R.H.M. Survey of Current Chess Openings Svetozar Gligoric Lubomir Kavalek Tigran Petrosian Vlastimil Hod Viktor Korchnoi Lajos Portisch Borislav Ivkov Bent Larsen Boris Spassky Anatoly Karpov

(continued on next page) List of Openings (Covering all Important Variations'in each Opening)

Sicilian Pirc Dutch King's Indian Alekhine Larsen’s Grtinfeid Ruy Lopez Queen's Gambit Nimzo-indian Benoni King's Gambit English French Queen’s Indian Reti Caro-Kann Benko Gambit (additions will be made)

All "Chess Opening" theory is in a perpetual stage of change, some lines being successfully challenged and discarded, other lines improved, new and promising lines being contin­ ually discovered as thousands of gam es are played in current grandmaster tournaments. Not only can your own game in your favorite Openings be greatly improved by study of the 100 current games in the Openings section selected by you. but you will gain new and valuable insights into the middle game play and end game piay flowing naturally from each line through the individual game annotation and analysis-in-depth by the many world- famed grandmasters who will be serving on our Board of Contributing Editors. The average cost of each full-size section containing all we have just described should be modest, but send no money— only your name and address on a postcard—so that you will be entered as a subscriber to receive announcements and full descriptions of each Openings section as they become ready for shipment. There is no charge for entering this subscrip­ tion, and it puts you under no obligation. You later order only what you wish to order. But you can help us (and yourself) by listing on the postcard the 5 top choices of Openings you would like to see covered. This informal "straw poll’’ will guide us in the order of pub­ lication of individual Openings sections. We are now preparing publication of sections covering some of the most popular Openings and commencing work on all the rest, and to receive announcements of each section as it becomes available, merely send your full name and address on a postcard to:

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