Encyclopaedia of Chess Openings Classification Code Index
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Encyclopaedia of Chess Openings Classification Code Index A00: Uncommon Openings: 1.g3 (Benko Opening), 1.Nc3 (Sleipner Opening), 1.a3 (Anderssen's Opening), 1.b4 (Sokolsky Opening), 1.g4 (Grob's Attack), 1.h3 (Basmanic Defence), 1.c3 (Saragossa Opening), 1.d3 (Mieses Opening), 1.e3 (French Attack), 1.h4 (Desprez Opening), 1.a4 (Ware Opening), 1.Nh3 (Amar Opening), 1.Na3 (Durkin's Attack), 1.f3 (Gedult's Opening) A01: Nimzowitsch-Larsen Attack: 1.b3 A02: Bird's Opening: 1.f4 A03: Bird's Opening: 1.f4 d5 A04: Reti Opening: 1.Nf3 A05: Reti Opening: 1.Nf3 Nf6 A06: Reti Opening: 1.Nf3 d5 A07: King's Indian Attack: 1.Nf3 d5 2.g3 A08: King's Indian Attack: 1.Nf3 d5 2.g3 c5 3.Bg2 A09: Reti Opening: 1.Nf3 d5 2.c4 A10: English: 1.c4 A11: English, Anglo-Slav System: 1.c4 c6 A12: English with b3: 1.c4 c6 2.Nf3 d5 3.b3 A13: English: 1.c4 e6 A14: English: 1.c4 e6 2.Nf3 d5 3.g3 Nf6 4.Bg2 Be7 5.O-O A15: English: 1.c4 Nf6 A16: English: 1.c4 Nf6 2.Nc3 A17: English: 1.c4 Nf6 2.Nc3 e6 A18: English, Mikenas-Carls: 1.c4 Nf6 2.Nc3 e6 3.e4 A19: English, Mikenas-Carls, Sicilian Variation: 1.c4 Nf6 2.Nc3 e6 3.e4 c5 A20: English: 1.c4 e5 A21: English: 1.c4 e5 2.Nc3 A22: English: 1.c4 e5 2.Nc3 Nf6 A23: English, Bremen System, Keres Variation: 1.c4 e5 2.Nc3 Nf6 3.g3 c6 A24: English, Bremen System with ...g6: 1.c4 e5 2.Nc3 Nf6 3.g3 g6 A25: English: 1.c4 e5 2.Nc3 Nc6 A26: English: 1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6 A27: English, Three Knights System: 1.c4 e5 2.Nc3 Nc6 3.Nf3 A28: English: 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 A29: English, Four Knights, Kingside Fianchetto: 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 g3 A30: English, Symmetrical: 1.c4 c5 A31: English, Symmetrical, Benoni Formation: 1.c4 c5 2.Nf3 Nf6 3.d4 A32: English, Symmetrical Variation: 1.c4 c5 2.Nf3 Nf6 3.d4 cxd4 4.Nxd4 e6 A33: English, Symmetrical: 1.c4 c5 2.Nf3 Nf6 3.d4 cxd4 4.Nxd4 e6 5.Nc3 Nc6 A34: English, Symmetrical: 1.c4 c5 2.Nc3 A35: English, Symmetrical: 1.c4 c5 2.Nc3 Nc6 A36: English, Symmetrical: 1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 A37: English, Symmetrical: 1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 A38: English, Symmetrical: 1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 Nf6 A39: English, Symmetrical: 1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 Nf6 6.O-O O-O 7.d4 A40: Unusual Black responses to 1.d4: 1...e5 (Englund Gambit), 1...b5 (Polish Defence), 1...Nc6 (Nimzowitsch Defence), 1...g6 (Modern Defence without 2.e4), 1...e6 (French Indian Defence). A41: Tartakower System: 1.d4 d6 A42: Tartakower System with 2.c4: 1.d4 d6 2.c4 A43: Various Benonis: 1.d4 c5 A44: Old Benoni: 1.d4 c5 2.d5 e5 A44: Semi-Benoni: 1.d4 c5 2.d5 e5 3.e4 d6 A45: Unusual Indian Openings: 1.d4 Nf6 A45: Trompowsky Attack: 1.d4 Nf6 2.Bg5 A46: Unusual Indian Openings with 2.Nf3: 1.d4 Nf6 2.Nf3 A47: Unusual Indian Openings with 2.Nf3: 1.d4 Nf6 2.Nf3 b6 A48: Torre Attack with 2...e6: 1.d4 Nf6 2.Nf3 e6 3.Bg5 A48: Torre Attack with 2...g6: 1.d4 Nf6 2.Nf3 g6 3.Bg5 A48: London System: 1.d4 Nf6 2.Nf3 e6 3.Bf4 A49: Fianchetto Variation: 1.d4 Nf6 2.Nf3 e6 3.g3 A50: Black Knights' Tango: 1.d4 Nf6 2.c4 Nc6 A51: Budapest Gambit Declined and Unusual Lines: 1.d4 Nf6 2.c4 e5 A52: Budapest Gambit Main Lines: 1.d4 Nf6 2.c4 e5 3.dxe5 Ng4 A53: Old Indian Defence: 1.d4 Nf6 2.c4 d6 A54: Old Indian Defence main lines: 1.d4 Nf6 2.c4 d6 3.Nc3 e5 A55: Old Indian Defence main lines: 1.d4 Nf6 2.c4 d6 3.Nc3 e5 4.Nf3 A56: Czech Benoni: 1.d4 Nf6 2.c4 c5 3.d5 A57: Benko/Volga Gambit sidelines: 1.d4 Nf6 2.c4 c5 3.d5 b5 A58: Benko/Volga Gambit Accepted: 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 A59: Benko/Volga Gambit Accepted (White castles by hand): 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.bxa6 Bxa6 6.Nc3 d6 7.e4 A60: Modern Benoni and early divergences: 1.d4 Nf6 2.c4 c5 3.d5 e6 A61: Modern Benoni without early e4: 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 A62: Modern Benoni, Fianchetto Variation without early ...Nbd7: 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.Nf3 g6 7.g3 A63: Modern Benoni, Fianchetto Variation sidelines: 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.Nf3 g6 7.g3 Bg7 8.Bg2 O-O A64: Modern Benoni, Fianchetto Variation main line: 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.Nf3 g6 7.g3 Bg7 8.Bg2 O-O 9.O-O Re8 10.Nd2 Nbd7 A65: Modern Benoni, sidelines with early e4: 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 A66: Modern Benoni, Mikenas Attack: 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.f4 Bg7 8.e5 A67: Modern Benoni, Taimanov Variation: 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.f4 Bg7 8.Bb5+ A68: Modern Benoni, Four Pawns Attack without 9...Re8: 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.f4 Bg7 8.Nf3 O-O 9.Bd3 A69: Modern Benoni, Four Pawns Attack with 9...Re8: 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.f4 Bg7 8.Nf3 O-O 9.Re8 A70: Modern Benoni, 7.Nf3: 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 A71: Modern Benoni, 7.Nf3 Bg7 8.Bg5 without Be2: 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Bg5 A72: Modern Benoni, Classical Variation with Bg5: 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Be2 O-O 9.Bg5 A73: Modern Benoni, Classical Variation and unusual Black 9th moves: 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Be2 O-O 9.O-O A74: Modern Benoni, Classical Variation with 9...a6: 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Be2 O-O 9.O-O a6 A75: Modern Benoni, Classical Variation main line: 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Be2 O-O 9.O-O a6 10.a4 Bg4 A76: Modern Benoni, Classical Variation with 9...Re8 10.Qc2: 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Be2 O-O 9.O-O Re8 10.Qc2 A77: Modern Benoni, Classical Variation with 9...Re8 10.Nd2: 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Be2 O-O 9.O-O Re8 10.Nd2 A78: Modern Benoni, Classical Variation with 10...Na6: 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Be2 O-O 9.O-O Re8 10.Nd2 Na6 A79: Modern Benoni, Classical Variation with 10...Na6 11.f3: 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Be2 O-O 9.O-O Re8 10.Nd2 Na6 11.f3 A80: Dutch Defence and unusual White second moves: 1.d4 f5 A81: Dutch Defence with 2.g3: 1.d4 f5 2.g3 A82: Dutch Defence, Staunton Gambit: 1.d4 f5 2.e4 A83: Dutch Defence, Staunton Gambit with 3.Nc3 Nf6 4.Bg5: 1.d4 f5 2.e4 fxe4 3.Nc3 Nf6 4.Bg5 A84: Dutch Defence, 2.c4: 1.d4 f5 2.c4 A85: Dutch Defence, 2.c4 Nf6 3.Nc3: 1.d4 f5 2.c4 Nf6 3.Nc3 A86: Dutch Defence, Leningrad Variation sidelines: 1.d4 f5 2.c4 Nf6 3.g3 A87: Dutch Defence, Leningrad Variation with 5.Nf3: 1.d4 f5 2.c4 Nf6 3.g3 Nf6 3.g6 4.Bg2 Bg7 5.Nf3 A88: Dutch Defence, Leningrad Variation main line 7...c6: 1.d4 f5 2.c4 Nf6 3.g3 Nf6 3.g6 4.Bg2 Bg7 5.Nf3 O-O 6.O-O d6 7.Nc3 c6 A89: Dutch Defence, Leningrad Variation main line 7...Nc6: 1.d4 f5 2.c4 Nf6 3.g3 Nf6 3.g6 4.Bg2 Bg7 5.Nf3 O-O 6.O-O d6 7.Nc3 c6 A90: Dutch Defence sidelines and Stonewall: 1.d4 f5 2.c4 Nf6 3.g3 e6 A91: Dutch Defence, Classical Variation sidelines: 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 A92: Dutch Defence, Classical Stonewall with ...Be7 and early deviations: 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 A93: Dutch Defence, Classical Stonewall with 7.b3: 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 d5 6.O- O O-O 7.b3 A94: Dutch Defence, Classical Stonewall with 7.b3 c6 8.Ba3: 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 d5 6.O-O O-O 7.b3 c6 8.Ba3 A95: Dutch Defence, Classical Stonewall with 7.Nc3 c6: 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 d5 6.O-O O-O 7.Nc3 c6 A96: Dutch Defence, Ilyin-Genevsky Variation: 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 O-O 6.O-O d6 A97: Dutch Defence, Ilyin-Genevsky Variation: 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 O-O 6.O-O d6 7.Nc3 Qe8 A98: Dutch Defence, Ilyin-Genevsky Variation with 8.Qc2: 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 O-O 6.O-O d6 7.Nc3 Qe8 8.Qc2 A99: Dutch Defence, Ilyin-Genevsky Variation with 8.b3: 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 O-O 6.O-O d6 7.Nc3 Qe8 8.b3 B00: Irregular Asymmetrical Responses to 1.e4: 1...a6 (St.George's Defence), 1...b6 (Owens' Defence), 1...f6 (Barnes Defence), 1...h6 (Carr Defence), 1...Na6 (Lemming Defence), 1...Nc6 (Nimzowitsch Defence), 1...Nh6 (Adams Defence), 1...a5 (Cornstalk Defence), 1...b5 (Polish Gambit), 1...f5 (Fred Defence), 1...g5 (Borg Defence), 1...h5 (Goldsmith Defence) B01: Scandinavian Defence: 1.e4 d5 B02: Alekhine Defence: Unusual White third moves: 1.e4 Nf6 2.e5 Nd5 3.g3, 3.c4, 3.Nc3 B03: Alekhine Defence, Four Pawns' Attack: 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.g3 B04: Alekhine Defence, Modern Variation: 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 B05: Alekhine Defence, Modern Variation: 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 Bg4 B06: Modern Defence: 1.e4 g6 B07: Pirc Defence, Unusual White second and third moves: 1.e4 d6 B08: Pirc Defence, Two Knights: 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Nf3 B08: Pirc Defence, Two Knights (Schlechter): 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Nf3 Bg7 5.h3 B08: Pirc Defence, Two Knights (Quiet): 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Nf3 Bg7 5.Be2 B09: Pirc Defence, Austrian Attack: 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 B10: Caro-Kann Defence, Unusual White second moves: 1.e4 c6 B11: Caro-Kann Defence, Unusual Black second moves: 1.e4 c6 2.d4 B11: Caro-Kann Defence, Two Knights Variation: 1.e4 c6 2.Nc3 B12: Caro-Kann Defence, Classical Variation: 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Bf5 B13: Caro-Kann Defence, Exchange Variation: 1.e4 c6 2.d4 d5 3.exd5 cxd5 4.Bd3 B13: Caro-Kann Defence, Panov-Botvinnik Attack: 1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4 B14: Caro-Kann Defence, Panov-Botvinnik Attack with 5...e6: 1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4 Nf6 5.Nc3 e6 B14: Caro-Kann Defence, Panov-Botvinnik Attack with 5...g6: 1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4 Nf6 5.Nc3 g6 B15: Caro-Kann Defence, 3.Nc3 sidelines: 1.e4 c6 2.d4 d5 3.Nc3 B15: Caro-Kann Defence, Korchnoi Variation: 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nf6 5.Nxf6 exf6 B16: Caro-Kann Defence, Larsen-Bronstein Variation: 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nf6 5.