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1 Domination and the Five Queens Problem
Ordog, SWiM Graph Theory Project: Domination and The Five Queens Problem 1 Domination and The Five Queens Problem What is the smallest number of queens that we can place on a chessboard so that every space on the board is either occupied by a queen or being attacked by at least one queen? How can you use graph theory to find a suitable arrangement of queens on an n × n chessboard? To find a solution to this problem, you will learn about the dominating set of a graph. 1.1 Domination • A dominating set of a graph G is a set of vertices S such that each vertex of G is either in S or adjacent to a vertex in S. • What is the biggest dominating set of the graph below? • What is the biggest dominating set for any graph G? • Can you find a dominating set with three vertices? Two vertices? One? Give an example, or explain why not. 1.2 The domination number • The dominating number of a graph, denoted γ(G), is the smallest number of vertices in any dominating set of a graph G. • What is γ(G) for the above graph? Page 1 Ordog, SWiM Graph Theory Project: Domination and The Five Queens Problem • Recall that the complete graph on n vertices, Kn, is the graph with n vertices such that each vertex is adjacent to every other vertex (they are all connected by an edge). What is γ(Kn)? • Exercise: Find γ(G) for the following graphs ([Smi88]). Look for and discuss patterns that might help come up with algorithms for finding dominating sets. -
Lessons Learned: a Security Analysis of the Internet Chess Club
Lessons Learned: A Security Analysis of the Internet Chess Club John Black Martin Cochran Ryan Gardner University of Colorado Department of Computer Science UCB 430 Boulder, CO 80309 USA [email protected], [email protected], [email protected] Abstract between players. Each move a player made was transmit- ted (in the clear) to an ICS server, which would then relay The Internet Chess Club (ICC) is a popular online chess that move to the opponent. The server enforced the rules of server with more than 30,000 members worldwide including chess, recorded the position of the game after each move, various celebrities and the best chess players in the world. adjusted the ratings of the players according to the outcome Although the ICC website assures its users that the security of the game, and so forth. protocol used between client and server provides sufficient Serious chess players use a pair of clocks to enforce security for sensitive information to be transmitted (such as the requirement that players move in a reasonable amount credit card numbers), we show this is not true. In partic- of time: suppose Alice is playing Bob; at the beginning ular we show how a passive adversary can easily read all of a game, each player is allocated some number of min- communications with a trivial amount of computation, and utes. When Alice is thinking, her time ticks down; after how an active adversary can gain virtually unlimited pow- she moves, Bob begins thinking as his time ticks down. If ers over an ICC user. -
Schachverein Online
SCHACH AUF TWITCH CHANCE FÜR VEREINE? ONLINE-VEREINSKONFERENZ AM 28. MÄRZ 2021 LEONID LÖW, ALLERSBERGER SC Dieser Vortrag enthält mehr Infos, als in der Präsentation enthalten sind. Ich empfehle daher die Videoaufzeichnung, die der DSB (voraussichtlich) auf seinen Youtube-Kanal hochladen wird. ALLERSBERGER SCHACH-CLUB 2000 • Ca. 80 Mitglieder • Davon über die Hälfte U25 • Davon etwa ein Drittel weiblich • Auszeichnungen • Qualitätssiegel Kinder- und Jugendschach 2020-23 • Verein des Jahres (3. Platz) 2010-14 ALLERSBERGER SCHACH-CLUB 2000 • Eigenes Vereinsheim seit 2014 ALLERSBERGER SCHACH-CLUB 2000 • Kirchweihturnier • Bonus-Malus-Regelung • Turnierangebote für Kinder und Erwachsene ALLERSBERGER SCHACH-CLUB 2000 • Weihnachtsfeier • Brezenbrotzeit • Schach-Wurst-Essen • Weinfest ALLERSBERGER SCHACH-CLUB 2000 • Turniere und Schachangebote an Schulen, bei öffentlichen Veranstaltungen u. v. m. ALLERSBERGER SCHACH-CLUB 2000 • Die symbolische erste Aufgabe für Verheiratete SCHACHTRAINING BEI TWITCH MÄRZ 2020 • 15. März: Absage des Trainings- und Spielbetriebs • 17. März: Registrierung des Kanals Allersbergerschachclub https://www.twitch.tv/allersbergerschachclub • 20. März: Erster Stream • 23. März: Veröffentlichung auf Website TRAINING BEIM ASC Mo Di Mi Do Fr Sa So Vor Ab 19.30 15.00-17.00 Unregelmäßig: März Vereinsabend Jugendschach 10.00-12.00 2020 Training Ab 19.30-20.30 16.00-17.00 17.00-18.00 15.00-16.00 10.00-11.00 März Fortgeschritten Anfänger- Bullet-Turnier Anfänger- Fortgeschritten 2020 en-Training Training (Lichess) Training en-Training -
The Vast Majority of Practical Games Do Not Involve Stunning Visual Tactics and Combinations and Are Instead More Mundane Affairs
Institute of Chess Revision Guide to LEVEL 2 The contents were written and arranged by GM Chris Ward FM Desmond Tan. This revision guide is dedicated to the memory of IM Bob Wade OBE (1921 ~ 2008), who devoted his life to chess. (Revised) September 2010 1 Institute of Chess Level 2 Coaching Course by GM Chris Ward and FM Desmond Tan Index of Contents Page 1) Notating a Game and the Four Move Mate 2 2) Annotation Symbols 4 3) The ‘Lawnmower’ Checkmate 5 4) Checkmating with a King and Queen 8 5) Checkmating with a King and Rook 11 6) The Sacrifice 14 7) Tips on Stalemate 18 8) The Fork 20 9) The Pin 21 10) The Skewer 24 11) Discovered Check 26 12) Double Check 28 13) Doubling up 30 14) The 7th Rank 33 15) The Overloaded Piece 35 16) General Opening Principles 36 17) Advice on Practical Play 44 2 Notating a Game Writing the moves down is a very useful exercise for a few reasons. If you are prone to moving too quickly then it will help you slow your play down and if you have a record of it then you can play over it later in order to either enjoy a nice game that you may have had or else figure out where you went wrong! We all learn from our mistakes and if you have a correctly completed score sheet then you can show it to someone else who may be able to offer you help. In competitions you will write down your game on specially-provided score sheets whilst some may obtain a scorebook so that they can all be written in the same place. -
Discarding the Doctrine of Supervisory Domination: New Solutions to an Old Conflict of Interest Lynn Cox
Hastings Law Journal Volume 30 | Issue 3 Article 10 1-1979 Discarding the Doctrine of Supervisory Domination: New Solutions to an Old Conflict of Interest Lynn Cox Peter Martin Nelson Follow this and additional works at: https://repository.uchastings.edu/hastings_law_journal Part of the Law Commons Recommended Citation Lynn Cox and Peter Martin Nelson, Discarding the Doctrine of Supervisory Domination: New Solutions to an Old Conflict of Interest, 30 Hastings L.J. 763 (1979). Available at: https://repository.uchastings.edu/hastings_law_journal/vol30/iss3/10 This Note is brought to you for free and open access by the Law Journals at UC Hastings Scholarship Repository. It has been accepted for inclusion in Hastings Law Journal by an authorized editor of UC Hastings Scholarship Repository. For more information, please contact [email protected]. Discarding the Doctrine of Supervisory Domination: New Solutions to an Old Conflict of Interest By Lynn Cox* Peter Martin Nelson** Introduction Supervisors dual identity in the labor movement, in which they serve both as employees and as employer representatives, poses a per- plexing conflict of interest. Congress has attempted to ameliorate this conflict by denying to supervisors the fights guaranteed to employees2 under the National Labor Relations Act and vesting employers with plenary power to control the union activities of their supervisors. Fre- quently, however, this power remains unexercised as employers acqui- esce in the union membership of their supervisors. The National Labor * A.B., 1976, University of California at Berkeley. Member, Third Year Class. ** B.A., 1976, Williams College. Member, Third Year Class. 1. The National Labor Relations Act § 2(11), 29 U.S.C. -
The Modernized Grünfeld Defense
The Modernized Grünfeld Defense First edition 2020 by Thinkers Publishing Copyright © 2020 Yaroslav Zherebukh All rights reserved. No part of this publication may be reproduced, stored in a re- trieval system or transmitted in any form or by any means, electronic, mechanical, photocopying, recording or otherwise, without the prior written permission from the publisher. All sales or enquiries should be directed to Thinkers Publishing, 9850 Landegem, Belgium. Email: [email protected] Website: www.thinkerspublishing.com Managing Editor: Romain Edouard Assistant Editor: Daniël Vanheirzeele Typesetting: Mark Haast Proofreading: Bob Bolliman Software: Hub van de Laar Cover Design: Iwan Kerkhof Graphic Artist: Philippe Tonnard Production: BESTinGraphics ISBN: 9789492510792 D/2020/13730/7 The Modernized Grünfeld Defense Yaroslav Zherebukh Thinkers Publishing 2020 Key to Symbols ! a good move ⩲ White stands slightly better ? a weak move ⩱ Black stands slightly better !! an excellent move ± White has a serious advantage ?? a blunder ∓ Black has a serious advantage !? an interesting move +- White has a decisive advantage ?! a dubious move -+ Black has a decisive advantage □ only move → with an attack N novelty ↑ with initiative ⟳ lead in development ⇆ with counterplay ⨀ zugzwang ∆ with the idea of = equality ⌓ better is ∞ unclear position ≤ worse is © with compensation for the + check sacrificed material # mate Table of Contents Key to Symbols ......................................................................................................... -
How I Beat Fischer's Record
Judit Polgar Teaches Chess 1 How I Beat Fischer’s Record by Judit Polgar with invaluable help from Mihail Marin Quality Chess www.qualitychess.co.uk Contents Key to Symbols used 4 Preface 5 1 Tricks 9 2 Mating Net 41 3 Trapping the Queen 57 4 Zwischenzug 63 5 Tales with an Unexpected End 69 6 Improving Piece Placement 77 7 Pawn Play 95 8 Piece Domination 103 9 A Lead in Development 121 10 Attacking the Uncastled King 133 11 The Art of Simplifying & Elements of Endgame Technique 163 12 Attacking without Queens 199 13 Decisive Games 227 14 Memorable Games 251 15 Amsterdam 1989 OHRA Tournament Diary 315 Records and Results 376 Game Index 378 Name Index 381 Preface I started flirting with the idea of publishing a collection of my best games a long time ago. For years, I was aware that the moment when I could fulfil my dream was far away. As a professional player, I spent most of my time and energy playing in tournaments and training, so each time the idea of my book popped up, I had to say to myself “Later, later...” By coincidence, several publishers approached me during this period. And although I was not prepared to embark on any definite project yet, I could feel that the whole idea was, little by little, starting to take shape. The critical moment The 2009 World Cup proved to be a decisive moment in the birth of my book. In the third round I played Boris Gelfand, a very strong opponent who eventually went on to win the event. -
2021-2022 the Commentator
HE OMMENTATOR T The Independent C Student Newspaper of Yeshiva University VOL. LXXXVII TUESDAY, AUGUST 31, 2021 ISSUE NO. 1 Students Return to Campus With Nearly No COVID-Restrictions By SEFFI JONAS This article was published online on August 29. Yeshiva University undergraduates re- turned to campus with nearly no COVID- restrictions on Wednesday, Aug. 25, when the fall semester began. Student council leaders and the Office of Student Life (OSL) organized the back-to-school programming. Last semester, about 550 students lived on campus. Those students were required to wear masks and receive a negative PCR test twice weekly. For the 2021-22 academic year, students only needed proof of vac- cination and a negative PCR test to return to campus, without further COVID testing. Unvaccinated students who were granted exception from the vaccine requirement have stricter guidelines. Superstorm Henri, which made landfall on Sunday, Aug. 22, delayed moving into the dorms for some of the student body. Despite the storm, orientation commenced that same Sunday evening. OSL provided students with several op- portunities to do chessed during the first week back on campus. Students pack- aged kosher Rosh Hashanah packages for American military service members. During YESHIVA UNIVERSITY Continued on Page 3 Students at Beren Campus YU Faculty Council Calls for Mandatory Indoor Judge Denies Masking as Fall Semester Begins Plaintiffs’ mandate be set for all indoor interactions,” Three days later, on Friday, Aug. 27, Request By SRULI FRUCHTER the resolution said, “providing our students Associate Dean of Students Joe Bednarsh and faculty the same protection that is pro- wrote in an email that three students — one Requiring YU In an emergency meeting on Tuesday vided for the vast majority of students and from Beren and two from Wilf— tested posi- night, Aug. -
E-Magazine July 2020
E-MAGAZINE JULY 2020 0101 #EOCC2020 European Online Corporate Championships announced for 3 & 4 of October #EOYCC2020 European Online Youth Chess Championhsip announced for 18-20 September. International Chess Day recognised by United Nations & UNESCO celebrated all over the World #InternationalChessDay On, 20th of July, World celebrates the #InternationalChessDay. The International Chess Federation (FIDE) was founded, 96 years ago on 20th July 1924. The idea to celebrate this day as the International Chess Day was proposed by UNESCO, and it has been celebrated as such since 1966. On December 12, 2019, the UN General Assembly unanimously approved a resolution recognising the World Chess Day. On the occasion of the International Chess Day, a tele-meeting between the United Nations and FIDE was held on 20th of July 2020. Top chess personalities and representatives of the U.N. gathered to exchange views and insights to strengthen the productive collaboration European Chess Union has its seat in Switzerland, Address: Rainweidstrasse 2, CH-6333, Hunenberg See, Switzerland ECU decided to make a special promotional #Chess video. Mr. European Chess Union is an independent Zurab Azmaiparashvili visited the Georgian most popular Musical association founded in 1985 in Graz, Austria; Competition Show “Big stage”.ECU President taught the judges of European Chess Union has 54 National Federation Members; Every year ECU organizes more than 20 show, famous artists, how to play chess and then played a game with prestigious events and championships. them! www.europechess.org Federations, clubs, players and chess lovers took part in the [email protected] celebration all over the world. -
Our 2019 U.S. Champs
UT-RGV WINS THE FINAL FOUR FOR THE SECOND YEAR IN A ROW July 2019 | USChess.org OUR 2019 U.S. CHAMPS HIKARU NAKAMURA nabs fifth U.S. Championship JENNIFER YU comes through for first U.S. Women’s Championship The United States’ Largest Chess Specialty Retailer 888.51.CHESS (512.4377) www.USCFSales.com NEW! The #1 endgame manual now has a workbook Jesus de la Villa’s worldwide bestseller 100 Endgames You Must Know successfully debunked the myth that endgame theory is complex and that endgame books are tedious. In this sequel GM De la Villa presents hundreds of exercises, covering all the endgames he selected. Ideal for every post-beginner, club player and candidate master who wishes to retain their knowledge, improve their technique and avoid common endgame errors. paperback | 288 pages | $24.95 | from the publishers of A Magazine “If you’ve never read an endgame book before, this is the one you should start with.” at least read 100 Endgames You Must Know.” Free Ground Shipping On All Books, Software and DVDS at US Chess Sales $25.00 Minimum - Excludes Clearance, Shopworn and Items Otherwise Marked 120TH ANNUAL U.S. OPEN AUGUST 3 - 11, 2019 | ORLANDO, FL ROSEN CENTRE HOTEL · 9840 INTERNATIONAL DRIVE, ORLANDO FL 32819 Please see htthttpp://www.usches. h s.s org/g/tournaments/r t/202 19/usopen/u / for full information including updates, schedules, meetings, and other special events and happenings. Schedule for 2019 U.S. Open Workshops & Committee Meetings Workshop schedule subject to change. For updates, please visit: uschess.org/tournaments/2019/usopen/ Time 9:00 AM 10:00 AM 11:00 AM NOON 1:00 PM 2:00 PM 3:00 PM 4:00 PM ARBITER'S SEMINAR ARBITER'S SEMINAR TDCC Problem Senior College Chess Women's Chess FIDE Events Ratings TDCC WEDNESDAY Solving August 7 Denker H.S. -
History, Comparative Law, and Bona Fide Purchases P
Louisiana Law Review Volume 29 | Number 2 The Work of the Louisiana Appellate Courts for the 1967-1968 Term: A Symposium February 1969 Sales of Another's Movables - History, Comparative Law, and Bona Fide Purchases P. Michael Hebert James R. Pettway Repository Citation P. Michael Hebert and James R. Pettway, Sales of Another's Movables - History, Comparative Law, and Bona Fide Purchases, 29 La. L. Rev. (1969) Available at: https://digitalcommons.law.lsu.edu/lalrev/vol29/iss2/19 This Comment is brought to you for free and open access by the Law Reviews and Journals at LSU Law Digital Commons. It has been accepted for inclusion in Louisiana Law Review by an authorized editor of LSU Law Digital Commons. For more information, please contact [email protected]. COMMENTS SALES OF ANOTHER'S MOVABLES-HISTORY, COMPARATIVE LAW, AND BONA FIDE PURCHASERS Certain recurring conflicts arise between men that any system of law must seek to resolve. When justice and reason fail to indicate one best solution to such a conflict, different legal systems may well reach different results. Although these different results are often supported in the technical terms or theory of the legal system involved, the actual decision to favor one party over the other in such a situation is basically one of policy.' This comment deals with the often arising conflict be- tween one who is owner of a movable and one who has acquired it without the owner's consent. Under some circumstances, jus- tice and reason clearly favor one party and in these situations the different legal systems have no difficulty reaching common results. -
The Queen's Gambit
01-01 Cover - April 2021_Layout 1 16/03/2021 13:03 Page 1 03-03 Contents_Chess mag - 21_6_10 18/03/2021 11:45 Page 3 Chess Contents Founding Editor: B.H. Wood, OBE. M.Sc † Editorial....................................................................................................................4 Executive Editor: Malcolm Pein Malcolm Pein on the latest developments in the game Editors: Richard Palliser, Matt Read Associate Editor: John Saunders 60 Seconds with...Geert van der Velde.....................................................7 Subscriptions Manager: Paul Harrington We catch up with the Play Magnus Group’s VP of Content Chess Magazine (ISSN 0964-6221) is published by: A Tale of Two Players.........................................................................................8 Chess & Bridge Ltd, 44 Baker St, London, W1U 7RT Wesley So shone while Carlsen struggled at the Opera Euro Rapid Tel: 020 7486 7015 Anish Giri: Choker or Joker?........................................................................14 Email: [email protected], Website: www.chess.co.uk Danny Gormally discusses if the Dutch no.1 was just unlucky at Wijk Twitter: @CHESS_Magazine How Good is Your Chess?..............................................................................18 Twitter: @TelegraphChess - Malcolm Pein Daniel King also takes a look at the play of Anish Giri Twitter: @chessandbridge The Other Saga ..................................................................................................22 Subscription Rates: John Henderson very much