A
- A00 Non-Standard Openings
- A01 Larsen's Opening
- A02 Bird's Opening
- A03 Bird's Opening, 1...d5
- A04 Réti Opening
- A05 Réti Opening, 1...Nf6
- A06 Réti Opening, 1...d5
- A07 Réti Opening, King's Indian Attack (Barcza system)
- A08 Réti Opening, King's Indian Attack with 2... c5 3. Bg2
- A09 Réti Opening, Main Line with 2. c4
- A10 English Opening
- A11 English, Caro-Kann defensive system
- A12 English, Caro-Kann defensive system
- A13 English Opening
- A14 English, Neo-Catalan declined
- A15 English, 1...Nf6 (Anglo-Indian defense)
- A16 English Opening
- A17 English Opening, Hedgehog Defense
- A18 English, Mikenas-Carls variation
- A19 English, Mikenas-Carls, Sicilian variation
- A20 English Opening
- A21 English Opening
- A22 English Opening
- A23 English Opening, Bremen system, Keres variation
- A24 English Opening, Bremen system with 3...g6
- A25 English Opening, Sicilian Reversed
- A26 English Opening, Closed system
- A27 English Opening, Three knights system
- A28 English Opening, Four knights system
- A29 English Opening, Four knights, kingside Fianchetto
- A30 English Opening, Symmetrical variation
- A31 English Opening, Symmetrical, Benoni formation
- A32 English Opening, Symmetrical
- A33 English Opening, Symmetrical
- A34 English Opening, Symmetrical
- A35 English Opening, Symmetrical
- A36 English Opening, Symmetrical
- A37 English Opening, Symmetrical
- A38 English Opening, Symmetrical
- A39 English Opening, Symmetrical, Main line with d4
- A40 Queen's Pawn Game, Irregular Defences
- A41 Queen's Pawn Game, 1... d6 without Nf6
- A42 Modern Defense, Averbakh system
- A43 Old Benoni Defense
- A44 Old Benoni Defense
- A45 Queen's Pawn Game, Trompowsky Attack
- A46 Queen's Pawn Game, Torre Attack
- A47 Queen's Indian Defense
- A48 King's Indian, East Indian defense
- A49 King's Indian, Fianchetto without c4
- A50 Queen's Pawn Game (1... Nf6 2. c4)
- A51 Budapest Defense declined
- A52 Budapest defense
- A53 Old Indian Defense
- A54 Old Indian, Ukrainian variation
- A55 Old Indian, Main line
- A56 Benoni Defense
- A57 Benko gambit
- A58 Benko gambit accepted
- A59 Benko gambit, 7.e4
- A60 Benoni defense
- A61 Benoni defense
- A62 Benoni, Fianchetto variation
- A63 Benoni, Fianchetto variation, 9...Nbd7
- A64 Benoni, Fianchetto variation, 11...Re8
- A65 Benoni, 6.e4
- A66 Benoni, pawn storm variation
- A67 Benoni, Taimanov variation
- A68 Benoni, Four pawns attack
- A69 Benoni, Four pawns attack, Main line
- A70 Benoni, Classical with e4 and Nf3
- A71 Benoni, Classical, 8.Bg5
- A72 Benoni, Classical without 9.O-O
- A73 Benoni, Classical, 9.O-O
- A74 Benoni, Classical, 9...a6, 10.a4
- A75 Benoni, Classical with ...a6 and 10...Bg4
- A76 Benoni, Classical, 9...Re8
- A77 Benoni, Classical, 9...Re8, 10.Nd2
- A78 Benoni, Classical with ...Re8 and ...Na6
- A79 Benoni, Classical, 11.f3
- A80 Dutch Defense
- A81 Dutch Defense
- A82 Dutch Defense, Staunton gambit
- A83 Dutch, Staunton gambit, Staunton's line
- A84 Dutch Defense, Main Line with 2. c4
- A85 Dutch with 2.c4 & 3.Nc3
- A86 Dutch with 2.c4 & 3.g3
- A87 Dutch, Leningrad, Main variation
- A88 Dutch, Leningrad, Main variation with 7...c6
- A89 Dutch, Leningrad, Main variation with Nc6
- A90 Dutch Defense
- A91 Dutch Defense
- A92 Dutch Defense
- A93 Dutch, Stonewall, Botvinnik variation
- A94 Dutch, Stonewall with Ba3
- A95 Dutch, Stonewall with Nc3
- A96 Dutch, Classical variation
- A97 Dutch, Ilyin-Genevsky variation
- A98 Dutch, Ilyin-Genevsky variation with Qc2
- A99 Dutch, Ilyin-Genevsky variation with b3
B
- B00 King's Pawn Opening, Irregular Defenses
- B01 Scandinavian Defense (Center-Counter Defense)
- B02 Alekhine's Defense
- B03 Alekhine's defense
- B04 Alekhine's defense, Modern variation
- B05 Alekhine's defense, Modern variation, 4...Bg4
- B06 Robatsch (Modern) Defense
- B07 Pirc Defense
- B08 Pirc, Classical (Two Knights) System
- B09 Pirc, Austrian attack
- B10 Caro-Kann Defense, Irregular Responses
- B11 Caro-Kann, Two knights, 3...Bg4
- B12 Caro-Kann Defense, main line with 2. d4
- B13 Caro-Kann, Exchange Variation
- B14 Caro-Kann, Panov-Botvinnik attack, 5...e6
- B15 Caro-Kann Defense, Main Line with 3. Nc3
- B16 Caro-Kann, Bronstein-Larsen variation
- B17 Caro-Kann, Steinitz variation
- B18 Caro-Kann, Classical variation
- B19 Caro-Kann, Classical, 7...Nd7
- B20 Sicilian Defense, Irregular Responses
- B21 Sicilian Defense, Grand Prix attack (2.f4) and Smith-Morra Gambit (2. d4)
- B22 Sicilian Defence, Alapin's variation (2.c3)
- B23 Sicilian Defense, Closed (2.Nc3)
- B24 Sicilian Defense, Closed with 2...Nc6 3.g3
- B25 Sicilian Defense, Closed with 3...g6 4.Bg2 Bg7 5.d3 d6
- B26 Sicilian Defense, Closed, 6.Be3
- B27 Sicilian Defense, Main Line (2.Nf3)
- B28 Sicilian, O'Kelly variation
- B29 Sicilian, Nimzovich-Rubinstein variation
- B30 Sicilian defense
- B31 Sicilian, Nimzovich-Rossolimo attack (with ...g6, without ...d6)
- B32 Sicilian defense
- B33 Sicilian, Sveshnikov (Lasker-Pelikan) variation
- B34 Sicilian, Accelerated Fianchetto, Exchange variation
- B35 Sicilian, Accelerated Fianchetto, Modern variation with Bc4
- B36 Sicilian, Accelerated Fianchetto, Maroczy bind
- B37 Sicilian, Accelerated Fianchetto, Maroczy bind, 5...Bg7
- B38 Sicilian, Accelerated Fianchetto, Maroczy bind, 6.Be3
- B39 Sicilian, Accelerated Fianchetto, Breyer variation
- B40 Sicilian defense
- B41 Sicilian, Kan variation
- B42 Sicilian, Kan, 5.Bd3
- B43 Sicilian, Kan, 5.Nc3
- B44 Sicilian defense
- B45 Sicilian, Taimanov variation
- B46 Sicilian, Taimanov variation
- B47 Sicilian, Taimanov (Bastrikov) variation
- B48 Sicilian, Taimanov variation
- B49 Sicilian, Taimanov variation
- B50 Sicilian Defence
- B51 Sicilian, Canal-Sokolsky attack
- B52 Sicilian, Canal-Sokolsky attack, 3...Bd7
- B53 Sicilian, Chekhover variation
- B54 Sicilian
- B55 Sicilian, Prins variation, Venice attack
- B56 Sicilian
- B57 Sicilian, Sozin (not Scheveningen)
- B58 Sicilian, Classical
- B59 Sicilian, Boleslavsky variation, 7.Nb3
- B60 Sicilian, Richter-Rauzer
- B61 Sicilian, Richter-Rauzer, Larsen variation, 7.Qd2
- B62 Sicilian, Richter-Rauzer, 6...e6
- B63 Sicilian, Richter-Rauzer, Rauzer attack
- B64 Sicilian, Richter-Rauzer, Rauzer attack, 7...Be7 defense, 9.f4
- B65 Sicilian, Richter-Rauzer, Rauzer attack, 7...Be7 defense, 9...Nxd4
- B66 Sicilian, Richter-Rauzer, Rauzer attack, 7...a6
- B67 Sicilian, Richter-Rauzer, Rauzer attack, 7...a6 defense, 8...Bd7
- B68 Sicilian, Richter-Rauzer, Rauzer attack, 7...a6 defense, 9...Be7
- B69 Sicilian, Richter-Rauzer, Rauzer attack, 7...a6 defense, 11.Bxf6
- B70 Sicilian, Dragon variation
- B71 Sicilian, Dragon, Levenfish variation
- B72 Sicilian, Dragon, 6.Be3
- B73 Sicilian, Dragon, Classical, 8.O-O
- B74 Sicilian, Dragon, Classical, 9.Nb3
- B75 Sicilian, Dragon, Yugoslav attack
- B76 Sicilian, Dragon, Yugoslav attack, 7...O-O
- B77 Sicilian, Dragon, Yugoslav attack, 9.Bc4
- B78 Sicilian, Dragon, Yugoslav attack, 10.O-O-O
- B79 Sicilian, Dragon, Yugoslav attack, 12.h4
- B80 Sicilian, Scheveningen variation
- B81 Sicilian, Scheveningen, Keres attack
- B82 Sicilian, Scheveningen, 6.f4
- B83 Sicilian, Scheveningen, 6.Be2
- B84 Sicilian, Scheveningen (Paulsen), Classical variation
- B85 Sicilian, Scheveningen, Classical variation with ...Qc7 and ...Nc6
- B86 Sicilian, Sozin attack
- B87 Sozin with ...a6 and ...b5
- B88 Sicilian, Sozin, Leonhardt variation
- B89 Sicilian, Sozin, 7.Be3
- B90 Sicilian, Najdorf
- B91 Sicilian, Najdorf, Zagreb (Fianchetto) variation
- B92 Sicilian, Najdorf, Zagreb (Fianchetto) variation
- B93 Sicilian, Najdorf, 6.f4
- B94 Sicilian, Najdorf, 6.Bg5
- B95 Sicilian, Najdorf, 6...e6
- B96 Sicilian, Najdorf, 7.f4
- B97 Sicilian, Najdorf, 7...Qb6
- B98 Sicilian, Najdorf, 7...Be7
- B99 Sicilian, Najdorf, 7...Be7 Main line
C
- C00 French Defense, Irregular Responses
- C01 French, Exchange Variation
- C02 French, Advance Variation
- C03 French, Tarrasch
- C04 French, Tarrasch, Guimard Main line
- C05 French, Tarrasch, Closed Variation
- C06 French, Tarrasch, Closed Variation, Main line
- C07 French, Tarrasch, Open Variation
- C08 French, Tarrasch, Open, 4.exd5 exd5
- C09 French, Tarrasch, Open Variation, Main line
- C10 French, Paulsen Variation
- C11 French Defense
- C12 French, MacCutcheon Variation
- C13 French, Classical
- C14 French, Classical Variation
- C15 French, Winawer (Nimzovich) Variation
- C16 French, Winawer, Advance Variation
- C17 French, Winawer, Advance Variation
- C18 French, Winawer, Advance Variation
- C19 French, Winawer, Advance, 6...Ne7
- C20 Open Game, Irregular Responses
- C21 Center Game
- C22 Center Game
- C23 Bishop's Opening
- C24 Bishop's Opening, Berlin Defense
- C25 Vienna Game (including Vienna Gambit accepted)
- C26 Vienna Game, Falkbeer Variation
- C27 Vienna Game, Falkbeer Variation with 3. Bc4 Nxe4
- C28 Vienna Game, Falkbeer Variation with 3. Bc4 Nc6
- C29 Vienna Gambit Declined
- C30 King's Gambit
- C31 King's Gambit Declined, Falkbeer Countergambit
- C32 King's Gambit Declined, Falkbeer, 5. dxe4
- C33 King's Gambit Accepted
- C34 King's Gambit Accepted
- C35 King's Gambit Accepted, Cunningham Defense
- C36 King's Gambit Accepted, Abbazia Defense (Classical Defense, Modern Defense)
- C37 King's Gambit Accepted, Quaade Gambit
- C38 King's Gambit Accepted
- C39 KGA, Allagier & Kiesertisky Gambits
- C40 King's Knight Opening
- C41 Philidor Defense
- C42 Petrov's Defense
- C43 Petrov's Defense, Steinitz (Modern) Attack
- C44 King's Knight Opening, Main Line
- C45 Scotch Game
- C46 Three Knights Game
- C47 Four Knights Game, Scotch Variation
- C48 Four Knights Game, Spanish Variation
- C49 Four Knights Game, Double Ruy Lopez
- C50 Italian Game, Irregular Openings and Giuoco Pianissimo
- C51 Evans Gambit
- C52 Evans Gambit with 4...Bxb4 5.c3 Ba5
- C53 Giuoco Piano
- C54 Giuoco Piano, Main line with 4... Nf6 5. d4 exd4 6. cxd4
- C55 Two Knights Defense
- C56 Two Knights Defense with 4. d4
- C57 Two Knights Defense, Main line with 4. Ng4
- C58 Two Knights Defense, Main line with 5... Na5
- C59 Two Knights Defense, Main line with 8... h6
- C60 Ruy Lopez
- C61 Ruy Lopez, Bird's Defense
- C62 Ruy Lopez, Old Steinitz Defense
- C63 Ruy Lopez, Schliemann Defense
- C64 Ruy Lopez, Classical (Cordel) Defense
- C65 Ruy Lopez, Berlin Defense
- C66 Ruy Lopez, Berlin Defense, 4.O-O, d6
- C67 Ruy Lopez, Berlin Defense, Open variation
- C68 Ruy Lopez, Exchange Variation
- C69 Ruy Lopez, Exchange Variation, 5.O-O
- C70 Ruy Lopez
- C71 Ruy Lopez, Modern Steinitz Defense
- C72 Ruy Lopez, Modern Steinitz Defense 5.0-0
- C73 Ruy Lopez, Modern Steinitz Defense, Richter variation
- C74 Ruy Lopez, Modern Steinitz Defense
- C75 Ruy Lopez, Modern Steinitz Defense
- C76 Ruy Lopez, Modern Steinitz Defense, Fianchetto (Bronstein) variation
- C77 Ruy Lopez, Morphy Defense
- C78 Ruy Lopez, 5.O-O
- C79 Ruy Lopez, Steinitz Defense Deferred (Russian Defense)
- C80 Ruy Lopez, Open (Tarrasch) Defense
- C81 Ruy Lopez, Open, Howell Attack
- C82 Ruy Lopez, Open, 9.c3
- C83 Ruy Lopez, Open, Classical Defense
- C84 Ruy Lopez, Closed Defense
- C85 Ruy Lopez, Exchange Variation Doubly Deferred (DERLD)
- C86 Ruy Lopez, Worrall Attack
- C87 Ruy Lopez, Closed, Averbach Variation
- C88 Ruy Lopez, Closed
- C89 Ruy Lopez, Marshall Counterattack
- C90 Ruy Lopez, Closed (with ...d6)
- C91 Ruy Lopez, Closed, 9.d4
- C92 Ruy Lopez, Closed, 9.h3
- C93 Ruy Lopez, Closed, Smyslov Defense
- C94 Ruy Lopez, Closed, Breyer Defense
- C95 Ruy Lopez, Closed, Breyer, 10.d4
- C96 Ruy Lopez, Closed, 8...Na5
- C97 Ruy Lopez, Closed, Chigorin Defense
- C98 Ruy Lopez, Closed, Chigorin, 12...Nc6
- C99 Ruy Lopez, Closed, Chigorin, 12...c5d4
D
- D00 Closed Game, Irregular Responses
- D01 Richter-Veresov Attack
- D02 Queen's Pawn Game, Zukertort Variation
- D03 Torre Attack (Tartakower variation)
- D04 Queen's Pawn Game, Zukertort Variation, Main Line with 3. e3
- D05 Queen's Pawn Game, Zukertort Variation, Main Line with 3... e6
- D06 Queen's Gambit, Unusual Declined
- D07 Chigorin Defense
- D08 Albin Countergambit
- D09 Albin Countergambit, 5.g3
- D10 QGD; Slav Defense
- D11 QGD; Slav Defense, 3.Nf3
- D12 QGD; Slav Defense, 4.e3 Bf5
- D13 QGD; Slav Defense, Exchange Variation
- D14 QGD; Slav Defense, Exchange Variation
- D15 QGD; Slav, 4.Nc3
- D16 QGD; Slav Accepted, Alapin Variation
- D17 QGD; Slav Defense, Czech Defense
- D18 QGD; Dutch Variation
- D19 QGD; Dutch Variation
- D20 Queen's Gambit Accepted (QGA)
- D21 QGA, 3. Nf3
- D22 QGA, Alekhine defense
- D23 QGA, 3... Nf6
- D24 QGA, 4.Nc3
- D25 QGA, 4.e3
- D26 QGA, Classical variation
- D27 QGA, Classical variation 6... a6
- D28 QGA, Classical variation 7.Qe2
- D29 QGA, Classical variation 8...Bb7
- D30 Queen's Gambit Declined (QGD)
- D31 QGD, 3.Nc3
- D32 QGD; Tarrasch Defense
- D33 QGD; Tarrasch, Schlechter-Rubinstein system
- D34 QGD; Tarrasch, 7...Be7
- D35 QGD; 3...Nf6
- D36 QGD; Exchange, positional line, 6.Qc2
- D37 QGD; 4.Nf3
- D38 QGD; Ragozin variation
- D39 QGD; Ragozin, Vienna variation
- D40 QGD; Semi-Tarrasch defense
- D41 QGD; Semi-Tarrasch, 5.cd
- D42 QGD; Semi-Tarrasch, 7.Bd3
- D43 QGD; Semi-Slav Defense
- D44 QGD; Semi-Slav 5.Bg5 dxc4
- D45 QGD; Semi-Slav 5.e3
- D46 QGD; Semi-Slav 6.Bd3
- D47 QGD; Semi-Slav 7.Bc4
- D48 QGD; Meran, 8...a6
- D49 QGD; Meran, 11.Nxb5
- D50 QGD; 4.Bg5
- D51 QGD; 4.Bg5 Nbd7
- D52 QGD
- D53 QGD; 4.Bg5 Be7
- D54 QGD; Anti-neo-Orthodox variation
- D55 QGD; 6.Nf3
- D56 QGD; Lasker defense
- D57 QGD; Lasker defense, Main line
- D58 QGD; Tartakower (Makagonov-Bondarevsky) system
- D59 QGD; Tartakower (Makagonov-Bondarevsky) system, 8.cd Nxd5
- D60 QGD; Orthodox defense
- D61 QGD; Orthodox defense, Rubinstein variation
- D62 QGD; Orthodox defense, 7.Qc2 c5, 8.cd (Rubinstein)
- D63 QGD; Orthodox defense, 7.Rc1
- D64 QGD; Orthodox defense, Rubinstein attack (with Rc1)
- D65 QGD; Orthodox defense, Rubinstein attack, Main line
- D66 QGD; Orthodox defense, Bd3 line
- D67 QGD; Orthodox defense, Bd3 line, Capablanca freeing manoeuver
- D68 QGD; Orthodox defense, Classical variation
- D69 QGD; Orthodox defense, Classical, 13.dxe5
- D70 Neo-Grünfeld Defence
- D71 Neo-Grünfeld, 5.cd
- D72 Neo-Grünfeld, 5.cd, Main line
- D73 Neo-Grünfeld, 5.Nf3
- D74 Neo-Grünfeld, 6.cd Nxd5, 7.O-O
- D75 Neo-Grünfeld, 6.cd Nxd5, 7.O-O c5, 8.Nc3
- D76 Neo-Grünfeld, 6.cd Nxd5, 7.O-O Nb6
- D77 Neo-Grünfeld, 6.O-O
- D78 Neo-Grünfeld, 6.O-O c6
- D79 Neo-Grünfeld, 6.O-O, Main line
- D80 Grünfeld Defence
- D81 Grünfeld; Russian variation
- D82 Grünfeld 4.Bf4
- D83 Grünfeld gambit
- D84 Grünfeld gambit accepted
- D85 Grünfeld, exchange variation
- D86 Grünfeld, Exchange, Classical variation
- D87 Grünfeld, Exchange, Spassky variation
- D88 Grünfeld, Spassky variation, Main line, 10...cd, 11.cd
- D89 Grünfeld, Spassky variation, Main line, 13.Bd3
- D90 Grünfeld, Three knights variation
- D91 Grünfeld, Three knights variation
- D92 Grünfeld, 5.Bf4
- D93 Grünfeld with 5.Bf4 O-O 6.e3
- D94 Grünfeld, 5.e3
- D95 Grünfeld with 5.e3 O-O 6.Qb3
- D96 Grünfeld, Russian variation
- D97 Grünfeld, Russian variation with 7.e4
- D98 Grünfeld, Russian, Smyslov variation
- D99 Grünfeld Defense, Smyslov, Main line
E
- E00 Queen's Pawn Game
- E01 Catalan, closed
- E02 Catalan, open, 5.Qa4
- E03 Catalan, open, Alekhine variation
- E04 Catalan, Open, 5.Nf3
- E05 Catalan, Open, Classical line
- E06 Catalan, Closed, 5.Nf3
- E07 Catalan, Closed, 6...Nbd7
- E08 Catalan, Closed, 7.Qc2
- E09 Catalan, Closed, Main line
- E10 Queen's Pawn Game 3.Nf3
- E11 Bogo-Indian Defense
- E12 Queen's Indian Defense
- E13 Queen's Indian, 4.Nc3, Main line
- E14 Queen's Indian, 4.e3
- E15 Queen's Indian, 4.g3
- E16 Queen's Indian, Capablanca variation
- E17 Queen's Indian, 5.Bg2 Be7
- E18 Queen's Indian, Old Main line, 7.Nc3
- E19 Queen's Indian, Old Main line, 9.Qxc3
- E20 Nimzo-Indian Defense
- E21 Nimzo-Indian, Three knights variation
- E22 Nimzo-Indian, Spielmann variation
- E23 Nimzo-Indian, Spielmann, 4...c5, 5.dc Nc6
- E24 Nimzo-Indian, Saemisch variation
- E25 Nimzo-Indian, Saemisch variation, Keres variation
- E26 Nimzo-Indian, Saemisch variation, 4.a3 Bxc3+ 5.bxc3 c5 6.e3
- E27 Nimzo-Indian, Saemisch variation, 5...0-0
- E28 Nimzo-Indian, Saemisch variation, 6.e3
- E29 Nimzo-Indian, Saemisch variation, Main line
- E30 Nimzo-Indian, Leningrad variation,
- E31 Nimzo-Indian, Leningrad variation, main line
- E32 Nimzo-Indian, Classical variation
- E33 Nimzo-Indian, Classical variation, 4...Nc6
- E34 Nimzo-Indian, Classical, Noa variation
- E35 Nimzo-Indian, Classical, Noa variation, 5.cxd5 exd5
- E36 Nimzo-Indian, Classical, Noa variation, 5.a3
- E37 Nimzo-Indian, Classical, Noa variation, Main line, 7.Qc2
- E38 Nimzo-Indian, Classical, 4...c5
- E39 Nimzo-Indian, Classical, Pirc variation
- E40 Nimzo-Indian, 4.e3
- E41 Nimzo-Indian, 4.e3 c5
- E42 Nimzo-Indian, 4.e3 c5, 5.Ne2 (Rubinstein)
- E43 Nimzo-Indian, Fischer variation
- E44 Nimzo-Indian, Fischer variation, 5.Ne2
- E45 Nimzo-Indian, 4.e3, Bronstein (Byrne) variation
- E46 Nimzo-Indian, 4.e3 O-O
- E47 Nimzo-Indian, 4.e3 O-O, 5.Bd3
- E48 Nimzo-Indian, 4.e3 O-O, 5.Bd3 d5
- E49 Nimzo-Indian, 4.e3, Botvinnik system
- E50 Nimzo-Indian, 4.e3 e8g8, 5.Nf3, without ...d5
- E51 Nimzo-Indian, 4.e3 e8g8, 5.Nf3 d7d5
- E52 Nimzo-Indian, 4.e3, Main line with ...b6
- E53 Nimzo-Indian, 4.e3, Main line with ...c5
- E54 Nimzo-Indian, 4.e3, Gligoric system with 7...dc
- E55 Nimzo-Indian, 4.e3, Gligoric system, Bronstein variation
- E56 Nimzo-Indian, 4.e3, Main line with 7...Nc6
- E57 Nimzo-Indian, 4.e3, Main line with 8...dxc4 and 9...Bxc4 cxd4
- E58 Nimzo-Indian, 4.e3, Main line with 8...Bxc3
- E59 Nimzo-Indian, 4.e3, Main line
- E60 King's Indian Defense
- E61 King's Indian Defense, 3.Nc3
- E62 King's Indian, Fianchetto variation
- E63 King's Indian, Fianchetto, Panno variation
- E64 King's Indian, Fianchetto, Yugoslav system
- E65 King's Indian, Yugoslav, 7.O-O
- E66 King's Indian, Fianchetto, Yugoslav Panno
- E67 King's Indian, Fianchetto with ...Nd7
- E68 King's Indian, Fianchetto, Classical variation, 8.e4
- E69 King's Indian, Fianchetto, Classical Main line
- E70 King's Indian, 4.e4
- E71 King's Indian, Makagonov system (5.h3)
- E72 King's Indian with e4 & g3
- E73 King's Indian, 5.Be2
- E74 King's Indian, Averbakh, 6...c5
- E75 King's Indian, Averbakh, Main line
- E76 King's Indian, Four pawns attack
- E77 King's Indian, Four pawns attack, 6.Be2
- E78 King's Indian, Four pawns attack, with Be2 and Nf3
- E79 King's Indian, Four pawns attack, Main line
- E80 King's Indian, Sämisch variation
- E81 King's Indian, Sämisch, 5...O-O
- E82 King's Indian, Sämisch, double Fianchetto variation
- E83 King's Indian, Sämisch, 6...Nc6
- E84 King's Indian, Sämisch, Panno Main line
- E85 King's Indian, Sämisch, Orthodox variation
- E86 King's Indian, Sämisch, Orthodox, 7.Nge2 c6
- E87 King's Indian, Sämisch, Orthodox, 7.d5
- E88 King's Indian, Sämisch, Orthodox, 7.d5 c6
- E89 King's Indian, Sämisch, Orthodox Main line
- E90 King's Indian, 5.Nf3
- E91 King's Indian, 6.Be2
- E92 King's Indian, Classical variation
- E93 King's Indian, Petrosian system, Main line
- E94 King's Indian, Orthodox variation
- E95 King's Indian, Orthodox, 7...Nbd7, 8.Re1
- E96 King's Indian, Orthodox, 7...Nbd7, Main line
- E97 King's Indian, Orthodox, Aronin-Taimanov variation (Yugoslav attack / Mar del Plata variation)
- E98 King's Indian, Orthodox, Aronin-Taimanov, 9.Ne1
- E99 King's Indian, Orthodox, Aronin-Taimanov, Main
https://en.wikipedia.org/wiki/Chess_opening
A chess opening or simply an opening is the initial stage of a chess game. It usually consists of established theory; the other phases are the middlegame and the endgame.[1]Many opening sequences have standard names such as the "Sicilian Defense". The Oxford Companion to Chess lists 1,327 named openings and variants, and there are many others with varying degrees of common usage.[2]
Opening moves that are considered standard are referred to as "book moves", or simply "book".[3]When a game begins to deviate from known opening theory, the players are said to be "out of book".[3] In some openings, "book" lines have been worked out for over 30 moves, as in the classical King's Indian Defense and in the Najdorf variation of the Sicilian Defense.[4]
Professional chess players spend years studying openings, and continue doing so throughout their careers, as opening theory continues to evolve. Players at the club level also study openings but the importance of the opening phase is smaller there since games are rarely decided in the opening. The study of openings can become unbalanced if it is to the exclusion of tactical training and middlegame and endgame strategy.[5]
A new sequence of moves in the opening is referred to as a theoretical novelty. When kept secret until used in a competitive game, it is often known as a prepared variation, a powerful weapon in top-class competition.[6]