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Eco Code Overview

Eco Code A: Irregular Openings

• A00 Irregular Openings
• 1.a3, c3, d3, e3, f3, g3, h3, g4, b4, Na3, Nc3, Nh3

• A01 Larsen’s Opening
• 1. b3

• A02 Bird’s Opening
• 1. f4

• A03 Bird’s Opening
• 1. f4 d5

• A04 Réti Opening
• 1. Nf3

• A05 Réti Opening
• 1. Nf3 Nf6

• A06 Réti Opening
• 1. Nf3 d5

• A07 Réti Opening King’s Indian Attack (Barcza System)
• 1. Nf3 d5 2. g3

• A08 Réti Opening King’s Indian Attack
• 1. Nf3 d5 2. g3 c5 3. Bg2

• A09 Réti Opening
• 1. Nf3 d5 2. c4

• A10 English Opening
• 1. c4

• A11 English, Caro–Kann defensive system
• 1. c4 c6

• A12 English, Caro–Kann defensive system
• 1. c4 c6 2. Nf3 d5 3. b3

• A13 English Opening
• 1. c4 e6

• A14 English, Neo-Catalan declined
• 1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Be7 5. 0-0

• A15 English, Anglo-Indian defence
• 1.c4 Nf6

• A16 English Opening 2. Nc3
• 1. c4 Nf6 2. Nc3

• A17 English Opening, Hedgehog Defence
• 1.c4 Nf6 2.Nc3 e6

• A18 English, Mikenas–Carls Variation
• 1.c4 Nf6 2.Nc3 e6 3.e4 d5 4.e5

• A19 English, Mikenas–Carls, Sicilian Variation
• 1. c4 Nf6 2. Nc3 e6 3. e4 c5

• A20 English Opening
• 1.c4 e5

• A21 English Opening 1. c4 e5 2. Nc3
• 1. c4 e5 2. Nc3

• A22 English Opening 1. c4 e5 2. Nc3 Nf6
• 1. c4 e5 2. Nc3 Nf6

• A23 English Opening, Bremen System, Keres Variation
• 1.c4 e5 2.Nc3 Nf6 3.g3 c6

• A24 English Opening, Bremen System with . ..g6
• 1.c4 e5 2.Nc3 Nf6 3.g3 g6

• A25 English Opening, Sicilian Reversed
• 1. c4 e5 2. Nc3 Nc6

• A26 English Opening, Closed System
• 1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6

• A27 English Opening, Three Knights System
• 1.c4 e5 2.Nc3 Nc6 3.Nf3

• A28 English Opening, Four Knights System
• 1. c4 e5 2. Nc3 Nc6 3. Nf3 Nf6

• A29 English Opening, Four Knights, Kingside Fianchetto
• 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.g3

• A30 English Opening, Symmetrical Defence
• 1.c4 c5

• A31 English Opening, Symmetrical, Anti-Benoni formation
• 1.c4 c5 2.Nf3 Nf6 3.d4

• A32 English Opening: Symmetrical Variation, Anti-Benoni Variation Spielmann Defence
• 1.c4 c5 2.Nf3 Nf6 3.d4 cxd4 4.Nxd4 e6

• A33 English Opening, Symmetrical
• 1. c4 c5 2. Nf3 Nf6 3. d4 cxd4 4. Nxd4 e6 5. Nc3 Nc6

• A34 English Opening, Symmetrical
• 1. c4 c5 2.Nc3

• A35 English Opening, Symmetrical
• 1. c4 c5 2.Nc3 Nc6

• A36 English Opening, Symmetrical
• 1. c4 c5 2. Nc3 Nc6 3. g3

• A37 English Opening, Symmetrical
• 1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nf3

• A38 English Opening, Symmetrical
• 1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nf3 Nf6

• A39 English Opening: Symmetrical Variation, Mecking Variation
• 1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 Nf6 6.O-O O-O 7.d4

• A40 Queen’s Pawn Game (including English Defence, Englund Gambit)
• 1. d4

• A41 Queen’s Pawn Game, Wade Defence
• 1. d4 d6

• A42 Modern Defence, Averbakh System also Wade Defence
• 1. d4 d6 2. c4 g6 3. Nc3 Bg7 4. e4

• A43 Old Benoni Defence
• 1.d4 c5

• A44 Old Benoni Defence
• 1.d4 c5 2. d5 e5

• A45 Queen’s Pawn Game
• 1. d4 Nf6

• A46 Queen’s Pawn Game, Torre Attack
• 1. d4 Nf6 2. Nf3

• A47 Queen’s Indian Defence
• 1.d4 Nf6 2.Nf3 b6

• A48 King’s Indian, East Indian Defence
• 1. d4 Nf6 2. Nf3 g6

• A49 King’s Indian, Fianchetto without c4
• 1. d4 Nf6 2. Nf3 g6 3. g3

• A50 Queen’s Pawn Game, Black Knights’ Tango
• 1. d4 Nf6 2. c4

• A51 Budapest Gambit Declined
• 1.d4 Nf6 2.c4 e5

• A52 Budapest Gambit
• 1. d4 Nf6 2. c4 e5 3. dxe5 Ng4

• A53 Old Indian Defence (Chigorin Indian Defence)
• 1. d4 Nf6 2. c4 d6

• A54 Old Indian, Ukrainian Variation
• 1. d4 Nf6 2. c4 d6 3. Nc3 e5

• A55 Old Indian, Main line
• 1.d4 Nf6 2.c4 d6 3.Nc3 e5 4.Nf3 Nbd7 5.e4

• A56 Benoni Defence
• 1. d4 Nf6 2. c4 c5

• A57 Benko Gambit
• 1. d4 Nf6 2. c4 c5 3. d5 b5

• A58 Benko Gambit Accepted
• 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6

• A59 Benko Gambit 7.e4
• 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.bxa6 Bxa6 6.Nc3 d6 7.e4

• A60 Benoni Defence
• 1.d4 Nf6 2.c4 c5 3.d5 e6

• A61 Benoni Defence
• 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. Nf3 g6

• A62 Benoni, Fianchetto Variation
• 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

• A63 Benoni Defence: Fianchetto Variation, Hastings Defence
• 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 Nbd7

• A64 Benoni, Fianchetto Variation, Hastings Defence 11…Re8
• 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 Nbd7 10.Nd2 a6 11.a4 Re8

• A65 Benoni Defence: King Pawn lines
• 1. d4 Nf6 2 c4 c5 3 d5 e6 4 Nc3 exd5 5 cxd5 d6 6 e4

• A66 Benoni, Pawn Storm Variation
• 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.f4 Bg7 8.e5

• A67 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 Benoni, Four Pawns Attack
• 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

• A69 Benoni, Four Pawns Attack, Main line
• 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.Be2 Re8

• A70 Benoni, Classical with e4 and Nf3
• 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3

• A71 Benoni Defence: Classical Variation, Averbakh-Grivas Attack
• 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Bg5

• A72 Benoni, Classical without 9.0-0
• 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Be2

• A73 Benoni Classical 9.0-0
• 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 Benoni Defence: Classical Variation, Full 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

• A75 Benoni Defence: Classical Variation, Argentine CounterAttack
• 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 Benoni Defence: Classical Variation, Czerniak Defence
• 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

• A77 Benoni Defence: Classical Variation, Czerniak Defence Tal 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 Re8 10.Nd2

• A78 Benoni, Classical with …Re8 and …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 Benoni, Classical, 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
• 1.d4 f5 (all without 2. g3, 2.e4, 2.c4)

• A81 Dutch Defence
• 1. d4 f5 2. g3

• A82 Dutch, Staunton Gambit including Balogh Defence
• 1.d4 f5 2.e4

• A83 Dutch, Staunton Gambit, Staunton’s line
• 1. d4 f5 2. e4 fxe4 3. Nc3 Nf6 4. Bg5

• A84 Dutch Defence
• 1. d4 f5 2. c4

• A85 Dutch with 2.c4 and 3.Nc3
• 1.d4 f5 2.c4 Nf6 3.Nc3

• A86 Dutch with 2.c4 and 3.g3
• 1.d4 f5 2.c4 Nf6 3.g3

• A87 Dutch, Leningrad, Main Variation
• 1.d4 f5 2.c4 Nf6 3.g3 g6 4.Bg2 Bg7 5.Nf3

• A88 Dutch Defence: Leningrad Variation, Warsaw Variation
• 1.d4 f5 2.c4 Nf6 3.g3 g6 4.Bg2 Bg7 5.Nf3 O-O 6.O-O d6 7.Nc3 c6

• A89 Dutch Defence: Leningrad Variation, Matulovic Variation
• 1.d4 f5 2.c4 Nf6 3.g3 g6 4.Bg2 Bg7 5.Nf3 O-O 6.O-O d6 7.Nc3 Nc6

• A90 Dutch Defence
• 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2

• A91 Dutch Defence
• 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7

• A92 Dutch Defence
• 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O

• A93 Dutch, Stonewall, Botvinnik Variation
• 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 O-O 6.O-O d5 7.b3

• A94 Dutch, Stonewall with Ba3
• 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 O-O 6.O-O d5 7.b3 c6 8.Ba3

• A95 Dutch, Stonewall with Nc3
• 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 O-O 6.O-O d5 7.Nc3 c6

• A96 Dutch, Classical Variation
• 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d6

• A97 Dutch, 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: Classical Variation, Ilyin-Zhenevsky Variation Alatortsev-Lisitsyn Line
• 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: Classical Variation, Ilyin-Zhenevsky Variation Modern Main Line
• 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

Eco Code B: Semi-Open Games

• B00 King’s Pawn Opening
• 1. e4 without 1…e5, 1…d5, 1…Nf6, 1…g6, 1…d6, 1…c6, 1…c5.

• B01 Scandinavian Defence (Center Counter Defence)
• 1. e4 d5

• B02 Alekhine’s Defence
• 1. e4 Nf6

• B03 Alekhine’s Defence 3.d4
• 1. e4 Nf6 2. e5 Nd5 3. d4

• B04 Alekhine’s Defence, Modern Variation
• 1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3

• B05 Alekhine’s Defence, Modern Variation, 4…Bg4
• 1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 Bg4

• B06 Robatsch (Modern) Defence, including Monkey’s Bum
• 1. e4 g6

• B07 Pirc Defence
• 1. e4 d6 2. d4 Nf6

• B08 Pirc, Classical (Two Knights) System
• 1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Nf3

• B09 Pirc, Austrian Attack
• 1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. f4

• B10 Caro-Kann Defence
• 1. e4 c6

• B11 Caro–Kann, Two knights, 3…Bg4
• 1. e4 c6 2. Nc3 d5 3. Nf3 Bg4

• B12 Caro–Kann Defence
• 1. e4 c6 2. d4

• B13 Caro–Kann, Exchange Variation
• 1. e4 c6 2. d4 d5 3. exd5

• B14 Caro–Kann, Panov–Botvinnik Attack, 5…e6
• 1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 e6

• B15 Caro–Kann Defence
• 1. e4 c6 2. d4 d5 3. Nc3

• B16 Caro–Kann, Bronstein–Larsen Variation
• 1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nf6 5. Nxf6+ gxf6

• B17 Caro–Kann, Steinitz Variation, Smyslov Systems
• 1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nd7

• B18 Caro–Kann, Classical Variation
• 1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5

• B19 Caro–Kann, Classical, 7…Nd7
• 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Bf5 5.Ng3 Bg6 6.h4 h6 7.Nf3 Nd7

• B20 Sicilian Defence
• 1. e4 c5

• B21 Sicilian, Grand Prix Attack and Smith-Morra Gambit, including the Siberian Trap
• 1. e4 c5 2. f4

• B22 Sicilian, Alapin Variation (2.c3)
• 1. e4 c5 2. c3

• B23 Sicilian, Closed, 2.Nc3
• 1. e4 c5 2. Nc3

• B24 Sicilian, Closed, 2.Nc3 Nc6 3.g3
• 1. e4 c5 2. Nc3 Nc6 3. g3

• B25 Sicilian, Closed, 3…g6 4.Bg2 Bg7 5.d3 d6
• 1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6

• B26 Sicilian, Closed, 6.Be3
• 1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. Be3

• B27 Sicilian Defence, 2.Nf3
• 1. e4 c5 2. Nf3

• B28 Sicilian, O’Kelly Variation
• 1. e4 c5 2. Nf3 a6

• B29 Sicilian, Nimzovich–Rubinstein Variation
• 1. e4 c5 2. Nf3 Nf6

• B30 Sicilian Defence, 2…Nc6
• 1. e4 c5 2. Nf3 Nc6

• B31 Sicilian, Nimzovich–Rossolimo Attack (3.Bb5 g6)
• 1. e4 c5 2. Nf3 Nc6 3. Bb5 g6

• B32 Sicilian Defence, 2…Nc6 3.d4
• 1. e4 c5 2. Nf3 Nc6 3. d4

• B33 Sicilian, Sveshnikov (Lasker–Pelikan) Variation
• 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6

• B34 Sicilian, Accelerated Fianchetto, Exchange Variation
• 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nxc6

• B35 Sicilian, Accelerated Fianchetto, Modern Variation with Bc4
• 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nc3 Bg7 6. Be3 Nf6 7. Bc4

• B36 Sicilian, Accelerated Fianchetto, Maroczy bind
• 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. c4

• B37 Sicilian, Accelerated Fianchetto, Maroczy bind, 5…Bg7
• 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. c4 Bg7

• B38 Sicilian, Accelerated Fianchetto, Maroczy bind, 6.Be3
• 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. c4 Bg7 6. Be3

• B39 Sicilian, Accelerated Fianchetto, Breyer Variation
• 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. c4 Bg7 6. Be3 Nf6 7. Nc3 Ng4

• B40 Sicilian Defence, 2.Nf3 e6
• 1. e4 c5 2. Nf3 e6

• B41 Sicilian, Kan Variation (4.Nxd4 a6)
• 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6

• B42 Sicilian, Kan, 5.Bd3
• 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3

• B43 Sicilian, Kan, 5.Nc3
• 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3

• B44 Sicilian Defence, 4.Nd4 Nc6
• 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6

• B45 Sicilian, Taimanov Variation, 5.Nc3
• 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3

• B46 Sicilian, Taimanov Variation
• 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 a6

• B47 Sicilian, Taimanov (Bastrikov) Variation
• 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7

• B48 Sicilian, Taimanov Variation
• 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Be3

• B49 Sicilian, Taimanov Variation
• 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Be3 a6 7. Be2

• B50 Sicilian
• 1. e4 c5 2. Nf3 d6

• B51 Sicilian, Canal–Sokolsky Attack
• 1. e4 c5 2. Nf3 d6 3. Bb5+

• B52 Sicilian, Canal–Sokolsky Attack, 3…Bd7
• 1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7

• B53 Sicilian, Chekhover Variation
• 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4

• B54 Sicilian
• 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4

• B55 Sicilian, Prins Variation, Venice Attack
• 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. f3 e5 6. Bb5+

• B56 Sicilian
• 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3

• B57 Sicilian, Sozin (not Scheveningen) including Magnus Smith Trap
• 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bc4

• B58 Sicilian, Classical
• 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Be2

• B59 Sicilian, Boleslavsky Variation, 7.Nb3
• 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Be2 e5 7. Nb3

• B60 Sicilian, Richter-Rauzer
• 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5

• B61 Sicilian, Richter–Rauzer, Larsen Variation, 7.Qd2
• 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 Bd7 7. Qd2

• B62 Sicilian, Richter–Rauzer, 6…e6
• 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6

• B63 Sicilian, Richter–Rauzer, Rauzer Attack
• 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2

• B64 Sicilian, Richter–Rauzer, Rauzer Attack, 7…Be7 defence, 9.f4
• 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 Be7 8. 0-0-0 0-0 9. f4

• B65 Sicilian, Richter–Rauzer, Rauzer Attack, 7…Be7 defence, 9…Nxd4
• 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 Be7 8. 0-0-0 0-0 9. f4 Nxd4

• B66 Sicilian, Richter–Rauzer, Rauzer Attack, 7…a6
• 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 a6

• B67 Sicilian, Richter–Rauzer, Rauzer Attack, 8…Bd7
• 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 a6 8. 0-0-0 Bd7

• B68 Sicilian, Richter–Rauzer, Rauzer Attack, 9…Be7
• 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 a6 8. 0-0-0 Bd7 9. f4 Be7

• B69 Sicilian, Richter–Rauzer, Rauzer Attack, 11.Bxf6
• 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 a6 8. 0-0-0 Bd7 9. f4 Be7 10. Nf3 b5 11. Bxf6

• B70 Sicilian, Dragon Variation
• 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6

• B71 Sicilian, Dragon, Levenfish Variation
• 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. f4

• B72 Sicilian, Dragon, 6.Be3
• 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3

• B73 Sicilian, Dragon, Classical, 8.0-0
• 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. Be2 Nc6 8. 0-0

• B74 Sicilian, Dragon, Classical, 9.Nb3
• 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. Be2 Nc6 8. 0-0 0-0 9. Nb3

• B75 Sicilian, Dragon, Yugoslav Attack
• 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3

• B76 Sicilian, Dragon, Yugoslav Attack, 7…0-0
• 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 0-0

• B77 Sicilian, Dragon, Yugoslav Attack, 9.Bc4
• 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 0-0 8. Qd2 Nc6 9. Bc4

• B78 Sicilian, Dragon, Yugoslav Attack, 10.0-0-0
• 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 0-0 8. Qd2 Nc6 9. Bc4 Bd7 10. 0-0-0

• B79 Sicilian, Dragon, Yugoslav Attack, 12.h4
• 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O 8. Qd2 Nc6 9. Bc4 Bd7 10. 0-0-0 Qa5 11. Bb3 Rfc8 12. h4

• B80 Sicilian, Scheveningen Variation
• 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6

• B81 Sicilian, Scheveningen, Keres Attack
• 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. g4

• B82 Sicilian, Scheveningen, 6.f4
• 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. f4

• B83 Sicilian, Scheveningen, 6.Be2
• 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Be2

• B84 Sicilian, Scheveningen (Paulsen), Classical Variation
• 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Be2 a6

• B85 Sicilian, Scheveningen, Classical Variation with …Qc7 and …Nc6
• 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Be2 a6 7. O-O Qc7 8. f4 Nc6

• B86 Sicilian, Sozin Attack
• 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Bc4

• B87 Sicilian, Sozin with …a6 and …b5
• 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Bc4 a6 7. Bb3 b5

• B88 Sicilian, Sozin, Leonhardt Variation
• 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Bc4 Nc6

• B89 Sicilian, Sozin, 7.Be3
• 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Bc4 Nc6 7. Be3

• B90 Sicilian, Najdorf
• 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6

• B91 Sicilian, Najdorf, Zagreb (Fianchetto) Variation (6.g3)
• 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. g3

• B92 Sicilian, Najdorf, Opocensky Variation (6.Be2)
• 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2

• B93 Sicilian, Najdorf, 6.f4
• 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. f4

• B94 Sicilian, Najdorf, 6.Bg5
• 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5

• B95 Sicilian, Najdorf, 6…e6
• 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6

• B96 Sicilian, Najdorf, 7.f4
• 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4

• B97 Sicilian, Najdorf, 7…Qb6 including Poisoned Pawn Variation
• 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Qb6

• B98 Sicilian, Najdorf, 7…Be7
• 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7

• B99 Sicilian, Najdorf, 7…Be7 Main line
• 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7

Eco Code C: Open Games

• C00 French Defence
• 1. e4 e6

• C01 French, Exchange Variation
• 1. e4 e6 2. d4 d5 3. exd5

• C02 French, Advance Variation
• 1. e4 e6 2. d4 d5 3. e5

• C03 French, Tarrasch
• 1. e4 e6 2. d4 d5 3. Nd2

• C04 French, Tarrasch, Guimard Main line
• 1. e4 e6 2. d4 d5 3. Nd2 Nc6 4. Ngf3 Nf6

• C05 French, Tarrasch, Closed Variation
• 1. e4 e6 2. d4 d5 3. Nd2 Nf6

• C06 French, Tarrasch, Closed Variation, Main line
• 1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. Bd3 c5 6. c3 Nc6 7. Ne2 cxd4 8. cxd4

• C07 French, Tarrasch, Open Variation
• 1. e4 e6 2. d4 d5 3. Nd2 c5

• C08 French, Tarrasch, Open, 4.exd5 exd5
• 1. e4 e6 2. d4 d5 3. Nd2 c5 4. exd5

• C09 French, Tarrasch, Open Variation, Main line
• 1. e4 e6 2. d4 d5 3. Nd2 c5 4. exd5 exd5 5. Ngf3 Nc6

• C10 French, Paulsen Variation
• 1. e4 e6 2. d4 d5 3. Nc3

• C11 French Defence
• 1. e4 e6 2. d4 d5 3. Nc3 Nf6

• C12 French, MacCutcheon Variation
• 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4

• C13 French, Classical
• 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7

• C14 French, Classical Variation
• 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. Bxe7 Qxe7

• C15 French, Winawer (Nimzovich) Variation
• 1. e4 e6 2. d4 d5 3. Nc3 Bb4

• C16 French, Winawer, Advance Variation
• 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5

• C17 French, Winawer, Advance Variation
• 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5

• C18 French, Winawer, Advance Variation
• 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3

• C19 French, Winawer, Advance, 6…Ne7
• 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7

• C20 King’s Pawn Game (includes Alapin’s Opening, Lopez Opening, Napoleon Opening, Portuguese Opening)
• 1.e4 e5

• C21 Center Game (includes Danish Gambit)
• 1. e4 e5 2. d4 exd4

• C22 Center Game
• 1. e4 e5 2. d4 exd4 3. Qxd4 Nc6

• C23 Bishop’s Opening
• 1. e4 e5 2. Bc4

• C24 Bishop’s Opening, Berlin Defence
• 1. e4 e5 2. Bc4 Nf6

• C25 Vienna Game
• 1. e4 e5 2. Nc3

• C26 Vienna Game, Falkbeer Variation
• 1. e4 e5 2. Nc3 Nf6

• C27 Vienna Game, Frankenstein-Dracula Variation
• 1. e4 e5 2. Nc3 Nf6 3. Bc4 Nxe4

• C28 Vienna Game
• 1. e4 e5 2. Nc3 Nf6 3. Bc4 Nc6

• C29 Vienna Gambit, Kaufmann Variation including Würzburger Trap
• 1. e4 e5 2. Nc3 Nf6 3. f4 d5

• C30 King’s Gambit
• 1. e4 e5 2. f4

• C31 King’s Gambit Declined, Falkbeer and Nimzowitsch (3….c6) Counter-Gambits
• 1. e4 e5 2. f4 d5

• C32 King’s Gambit Declined, Falkbeer, 5.dxe4
• 1. e4 e5 2. f4 d5 3. exd5 e4 4. d3 Nf6 5. dxe4

• C33 King’s Gambit Accepted
• 1. e4 e5 2. f4 exf4

• C34 King’s Gambit Accepted, including Fischer Defence
• 1. e4 e5 2. f4 exf4 3. Nf3

• C35 King’s Gambit Accepted, Cunningham Defence
• 1. e4 e5 2. f4 exf4 3. Nf3 Be7

• C36 King’s Gambit Accepted, Abbazia Defence (Classical Defence, Modern Defence)
• 1. e4 e5 2. f4 exf4 3. Nf3 d5

• C37 King’s Gambit Accepted, Quaade Gambit
• 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Nc3

• C38 King’s Gambit Accepted
• 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 Bg7

• C39 King’s Gambit Accepted, Allgaier and Kieseritsky Gambits including Rice Gambit
• 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4

• C40 King’s Knight Opening (includes Gunderam Defence, Greco Defence, Damiano Defence, Elephant Gambit, and Latvian Gambit)
• 1. e4 e5 2. Nf3

• C41 Philidor Defence
• 1. e4 e5 2. Nf3 d6

• C42 Petrov’s Defence, including Marshall Trap
• 1. e4 e5 2. Nf3 Nf6

• C43 Petrov’s Defence, Modern (Steinitz) Attack
• 1. e4 e5 2. Nf3 Nf6 3. d4

• C44 King’s Pawn Game (includes Ponziani Opening, Inverted Hungarian Opening, Irish Gambit and some Scotch Game)
• 1. e4 e5 2. Nf3 Nc6

• C45 Scotch Game
• 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4

• C46 Three Knights Game including Halloween Gambit
• 1. e4 e5 2. Nf3 Nc6 3. Nc3

• C47 Four Knights Game
• 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4

• C48 Four Knights Game, Spanish Variation
• 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5

• C49 Four Knights Game, Double Ruy Lopez
• 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4

• C50 King’s Pawn Game (incl. Blackburne Shilling Gambit, Hungarian Defence, Paris Defence, Italian Gambit, Légal Trap)
• 1. e4 e5 2. Nf3 Nc6 3. Bc4

• C51 Evans Gambit
• 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4

• C52 Evans Gambit with 4…Bxb4 5.c3 Ba5
• 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5

• C53 Giuoco Piano
• 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3

• C54 Giuoco Piano 6. cxd4
• 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. cxd4

• C55 Two Knights Defence
• 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6

• C56 Two Knights Defence w/ 4. d4
• 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4

• C57 Two Knights Defence, including the Fegatello Attack
• 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5

• C58 Two Knights Defence
• 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5

• C59 Two Knights Defence
• 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. Bb5+ c6 7. dxc6 bxc6 8. Be2

• C60 Ruy Lopez Unusual Black 3rd moves and 3…g6
• 1. e4 e5 2. Nf3 Nc6 3. Bb5

• C61 Ruy Lopez, Bird’s Defence
• 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nd4

• C62 Ruy Lopez, Old Steinitz Defence
• 1. e4 e5 2. Nf3 Nc6 3. Bb5 d6

• C63 Ruy Lopez, Schliemann Defence
• 1. e4 e5 2. Nf3 Nc6 3. Bb5 f5

• C64 Ruy Lopez, Classical (Cordel) Defence
• 1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5

• C65 Ruy Lopez, Berlin Defence including Mortimer Trap
• 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6

• C66 Ruy Lopez, Berlin Defence, 4.0-0 d6
• 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. 0-0 d6

• C67 Ruy Lopez, Berlin Defence, Open Variation
• 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. 0-0 Nxe4

• C68 Ruy Lopez, Exchange Variation
• 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6

• C69 Ruy Lopez, Exchange Variation, 5.0-0
• 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. 0-0

• C70 Ruy Lopez
• 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4

• C71 Ruy Lopez, Modern Steinitz Defence including Noah’s Ark Trap
• 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6

• C72 Ruy Lopez, Modern Steinitz Defence 5.0-0
• 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. 0-0

• C73 Ruy Lopez, Modern Steinitz Defence, Richter Variation
• 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. Bxc6+ bxc6 6. d4

• C74 Ruy Lopez, Modern Steinitz Defence
• 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c3

• C75 Ruy Lopez, Modern Steinitz Defence
• 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c3 Bd7

• C76 Ruy Lopez, Modern Steinitz Defence, Fianchetto (Bronstein) Variation
• 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c3 Bd7 6. d4 g6

• C77 Ruy Lopez, Morphy Defence
• 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6

• C78 Ruy Lopez, 5.0-0
• 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0

• C79 Ruy Lopez, Steinitz Defence Deferred (Russian Defence)
• 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 d6

• C80 Ruy Lopez, Open (Tarrasch) Defence
• 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Nxe4

• C81 Ruy Lopez, Open, Howell Attack
• 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9.Qe2

• C82 Ruy Lopez, Open, 9.c3
• 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. c3

• C83 Ruy Lopez, Open, Classical Defence
• 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. c3 Be7

• C84 Ruy Lopez, Closed Defence
• 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7

• C85 Ruy Lopez, Exchange Variation Doubly Deferred
• 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Bxc6

• C86 Ruy Lopez, Worrall Attack
• 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Qe2

• C87 Ruy Lopez, Closed, Averbakh Variation
• 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Re1 d6

• C88 Ruy Lopez, Closed
• 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Re1 b5 7. Bb3

• C89 Ruy Lopez, Marshall CounterAttack
• 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Re1 b5 7. Bb3 0-0 8. c3 d5

• C90 Ruy Lopez, Closed, 7…d6
• 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d6

• C91 Ruy Lopez, Closed, 9.d4
• 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Re1 b5 7. Bb3 d6 8. c3 0-0 9. d4

• C92 Ruy Lopez, Closed, 9.h3
• 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Re1 b5 7. Bb3 d6 8. c3 0-0 9. h3

• C93 Ruy Lopez, Closed, Smyslov Defence
• 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 O-O 8.c3 d6 9.h3 h6

• C94 Ruy Lopez, Closed, Breyer Defence
• 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Re1 b5 7. Bb3 d6 8. c3 0-0 9. h3 Nb8

• C95 Ruy Lopez, Closed, Breyer Defence, 10.d4
• 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Re1 b5 7. Bb3 d6 8. c3 0-0 9. h3 Nb8 10. d4

• C96 Ruy Lopez, Closed, 8…Na5
• 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Re1 b5 7. Bb3 d6 8. c3 0-0 9. h3 Na5 10. Bc2

• C97 Ruy Lopez, Closed, Chigorin Defence
• 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Re1 b5 7. Bb3 d6 8. c3 0-0 9. h3 Na5 10. Bc2 c5 11. d4 Qc7

• C98 Ruy Lopez, Closed, Chigorin, 12…Nc6
• 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Re1 b5 7. Bb3 d6 8. c3 0-0 9. h3 Na5 10. Bc2 c5 11. d4 Qc7 12. Nbd2 Nc6

• C99 Ruy Lopez, Closed, Chigorin, 12…cxd4
• 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Re1 b5 7. Bb3 d6 8. c3 0-0 9. h3 Na5 10. Bc2 c5 11. d4 Qc7 12. Nbd2 cxd4 13. cxd4

Eco Code D: Closed Games and Semi-Closed Games

• D00 Queen’s Pawn Game (including Blackmar–Diemer Gambit, Halosar Trap and others)
• 1. d4 d5

• D01 Richter–Veresov Attack
• 1. d4 d5 2. Nc3 Nf6 3. Bg5

• D02 Queen’s Pawn Game, 2.Nf3
• 1. d4 d5 2. Nf3

• D03 Torre Attack, Tartakower Variation
• 1. d4 d5 2. Nf3 Nf6 3. Bg5

• D04 Queen’s Pawn Game
• 1. d4 d5 2. Nf3 Nf6 3. e3

• D05 Queen’s Pawn Game, Zukertort Variation (including Colle system)
• 1. d4 d5 2. Nf3 Nf6 3. e3 e6

• D06 Queen’s Gambit (including the Baltic Defence, Marshall Defence and Symmetrical Defence)
• 1. d4 d5 2. c4

• D07 Queens Gambit Declined; Chigorin Defence
• 1. d4 d5 2. c4 Nc6

• D08 Queens Gambit Declined; Albin Counter-Gambit and Lasker Trap
• 1. d4 d5 2. c4 e5

• D09 Queens Gambit Declined; Albin Counter-Gambit, 5.g3
• 1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 Nc6 5. g3

• D10 Queens Gambit Declined; Slav Defence
• 1. d4 d5 2. c4 c6

• D11 Queens Gambit Declined; Slav Defence, 3.Nf3
• 1. d4 d5 2. c4 c6 3. Nf3

• D12 Queens Gambit Declined; Slav Defence, 4.e3 Bf5
• 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 Bf5

• D13 Queens Gambit Declined; Slav Defence, Exchange Variation
• 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. cxd5

• D14 Queens Gambit Declined; Slav Defence, Exchange Variation
• 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. cxd5 cxd5 5. Nc3 Nc6 6. Bf4 Bf5

• D15 Queens Gambit Declined; Slav, 4.Nc3
• 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3

• D16 Queens Gambit Declined; Slav accepted, Alapin Variation
• 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4

• D17 Queens Gambit Declined; Slav Defence, Czech Defence
• 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5

• D18 Queens Gambit Declined; Dutch Variation
• 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. e3

• D19 Queens Gambit Declined; Dutch Variation
• 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. e3 e6 7. Bc4 Bb4 8. 0-0

• D20 Queen’s Gambit Accepted
• 1. d4 d5 2. c4 dxc4

• D21 Queen’s Gambit Accepted, 3.Nf3
• 1. d4 d5 2. c4 dxc4 3. Nf3

• D22 Queen’s Gambit Accepted; Alekhine Defence
• 1. d4 d5 2. c4 dxc4 3. Nf3 a6

• D23 Queen’s Gambit Accepted
• 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6

• D24 Queen’s Gambit Accepted, 4.Nc3
• 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. Nc3

• D25 Queen’s Gambit Accepted, 4.e3
• 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3

• D26 Queen’s Gambit Accepted; Classical Variation
• 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6

• D27 Queen’s Gambit Accepted; Classical Variation
• 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6

• D28 Queen’s Gambit Accepted; Classical Variation 7.Qe2
• 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. 0-0 a6 7. Qe2

• D29 Queen’s Gambit Accepted; Classical Variation 8…Bb7
• 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 b5 8. Bb3 Bb7

• D30 Queen’s Gambit Declined: Orthodox Defence
• 1. d4 d5 2. c4 e6

• D31 Queens Gambit Declined, 3.Nc3
• 1. d4 d5 2. c4 e6 3. Nc3

• D32 Queens Gambit Declined; Tarrasch Defence
• 1. d4 d5 2. c4 e6 3. Nc3 c5

• D33 Queens Gambit Declined; Tarrasch, Schlechter–Rubinstein System
• 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3

• D34 Queens Gambit Declined; Tarrasch, 7…Be7
• 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7

• D35 Queens Gambit Declined; Exchange Variation
• 1. d4 d5 2. c4 e6 3. Nc3 Nf6

• D36 Queens Gambit Declined; Exchange, positional line, 6.Qc2
• 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. cxd5 exd5 5. Bg5 c6 6. Qc2

• D37 Queens Gambit Declined; 4.Nf3
• 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3

• D38 Queens Gambit Declined; Ragozin Variation
• 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 Bb4

• D39 Queens Gambit Declined; Ragozin, Vienna Variation
• 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 Bb4 5. Bg5 d5xc4

• D40 Queens Gambit Declined; Semi-Tarrasch Defence
• 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5

• D41 Queens Gambit Declined; Semi-Tarrasch, 5.cxd5
• 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. cxd5

• D42 Queens Gambit Declined; Semi-Tarrasch, 7.Bd3
• 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. cxd5 Nxd5 6. e3 Nc6 7. Bd3

• D43 Queens Gambit Declined; Semi-Slav Defence
• 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6

• D44 Queens Gambit Declined; Semi-Slav 5.Bg5 dxc4
• 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. Bg5 dxc4

• D45 Queens Gambit Declined; Semi-Slav 5.e3
• 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3

• D46 Queens Gambit Declined; Semi-Slav 6.Bd3
• 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 6. Bd3

• D47 Queens Gambit Declined; Semi-Slav 7.Bc4
• 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4

• D48 Queens Gambit Declined; Meran, 8…a6
• 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6

• D49 Queens Gambit Declined; Meran, 11.Nxb5
• 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6 9. e4 c5 10. e5 cxd4 11. Nxb5

• D50 Queens Gambit Declined; 4.Bg5
• 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5

• D51 GD; 4.Bg5 Nbd7 (Cambridge Springs Defence and Elephant Trap)
• 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7

• D52 Queens Gambit Declined
• 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. e3 c6 6. Nf3

• D53 Queens Gambit Declined; 4.Bg5 Be7
• 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7

• D54 Queens Gambit Declined; Anti-neo-Orthodox Variation
• 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Rc1

• D55 Queens Gambit Declined; 6.Nf3
• 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3

• D56 Queens Gambit Declined; Lasker Defence
• 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 h6 7.Bh4 Ne4

• D57 Queens Gambit Declined; Lasker Defence, Main line
• 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 h6 7.Bh4 Ne4 8. Bxe7 Qxe7 9. cxd5 Nxc3 10. bxc3

• D58 Queens Gambit Declined; Tartakower (Tartakower–Makogonov–Bondarevsky) System
• 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 0-0 6. Nf3 p 7. Bh4 b6

• D59 Queens Gambit Declined; Tartakower (Tartakower–Makogonov–Bondarevsky) System, 8.cxd5 Nxd5
• 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 0-0 6. Nf3 p 7. Bh4 b6 8. cxd5 Nxd5

• D60 Queens Gambit Declined; Orthodox Defence
• 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7

• D61 Queens Gambit Declined; Orthodox Defence, Rubinstein Variation
• 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 0-0 6. Nf3 Nbd7 7. Qc2

• D62 Queens Gambit Declined; Orthodox Defence, 7.Qc2 c5, 8.cxd5 (Rubinstein)
• 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Qc2 c5 8. cxd5

• D63 Queens Gambit Declined; Orthodox Defence, 7.Rc1
• 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 0-0 6. Nf3 Nbd7 7. Rc1

• D64 Queens Gambit Declined; Orthodox Defence, Rubinstein Attack (with Rc1)
• 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 0-0 6. Nf3 Nbd7 7. Rc1 c6 8. Qc2

• D65 Queens Gambit Declined; Orthodox Defence, Rubinstein Attack, Main line
• 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 0-0 6. Nf3 Nbd7 7. Rc1 c6 8. Qc2 a6 9.cxd5

• D66 Queens Gambit Declined; Orthodox Defence, Bd3 line including Rubinstein Trap
• 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8. Bd3

• D67 Queens Gambit Declined; Orthodox Defence, Bd3 line, Capablanca freeing manoeuvre
• 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8. Bd3 dxc4 9. Bxc4 Nd5

• D68 Queens Gambit Declined; Orthodox Defence, Classical Variation
• 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8. Bd3 dxc4 9. Bxc4 Nd5 10. Bxe7 Qxe7 11. O-O Nxc3 12. Rxc3 e5

• D69 Queens Gambit Declined; Orthodox Defence, Classical, 13.dxe5
• 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8. Bd3 dxc4 9. Bxc4 Nd5 10. Bxe7 Qxe7 11. O-O Nxc3 12. Rxc3 e5 13. dxe5 Nxe5 14. Nxe5 Qxe5

• D70 Neo-Gruenfeld Defence
• 1. d4 Nf6 2. c4 g6 3. g3 d5

• D71 Neo-Gruenfeld, 5.cxd5 Nxd5
• 1. d4 Nf6 2. c4 g6 3. g3 d5 4. Bg2 Bg7 5. cxd5 Nxd5

• D72 Neo-Gruenfeld, Main line
• 1. d4 Nf6 2. c4 g6 3. g3 d5 4. Bg2 Bg7 5. cxd5 Nxd5 6. e4 Nb6 7. Ne2

• D73 Neo-Gruenfeld, 5.Nf3
• 1. d4 Nf6 2. c4 g6 3. g3 d5 4. Bg2 Bg7 5. Nf3

• D74 Neo-Gruenfeld, 6.cxd5 Nxd5, 7.0-0
• 1. d4 Nf6 2. c4 g6 3. g3 d5 4. Bg2 Bg7 5. Nf3 0-0 6. cxd5 Nxd5 7. 0-0

• D75 Neo-Gruenfeld, 6.cxd5 Nxd5, 7.0-0 c5, 8.Nc3
• 1. d4 Nf6 2. c4 g6 3. g3 d5 4. Bg2 Bg7 5. Nf3 0-0 6. cxd5 Nxd5 7. 0-0 c5 8. Nc3

• D76 Neo-Gruenfeld, 6.cxd5 Nxd5, 7.0-0 Nb6
• 1. d4 Nf6 2. c4 g6 3. g3 d5 4. Bg2 Bg7 5. Nf3 0-0 6. cxd5 Nxd5 7. 0-0 Nb6

• D77 Neo-Gruenfeld, 6.0-0
• 1. d4 Nf6 2. c4 g6 3. g3 d5 4. Bg2 Bg7 5. Nf3 O-O 6. O-O

• D78 Neo-Gruenfeld, 6.0-0 c6
• 1. d4 Nf6 2. c4 g6 3. g3 d5 4. Bg2 Bg7 5. Nf3 0-0 6. 0-0 c6

• D79 Neo-Gruenfeld, 6.0-0, Main line
• 1. d4 Nf6 2. c4 g6 3. g3 d5 4. Bg2 Bg7 5. Nf3 0-0 6. 0-0 c6 7. cxd5 cxd5

• D80 Gruenfeld Defence
• 1. d4 Nf6 2. c4 g6 3. Nc3 d5

• D81 Gruenfeld; Russian Variation
• 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Qb3

• D82 Gruenfeld 4.Bf4
• 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4

• D83 Gruenfeld Gambit
• 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4 Bg7 5. e3 0-0

• D84 Gruenfeld Gambit Accepted
• 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4 Bg7 5. e3 O-O 6. Rc1 c5 7. dxc5 Be6

• D85 Gruenfeld, Nadanian Variation
• 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5

• D86 Gruenfeld, Exchange, Classical Variation
• 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4

• D87 Gruenfeld, Exchange, Spassky Variation
• 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 O-O 8. Ne2 c5

• D88 Gruenfeld, Spassky Variation, Main line, 10…cxd4, 11.cxd4
• 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 0-0 8. Ne2 c5 9. 0-0 Nc6 10. Be3 cxd4 11. cxd4

• D89 Gruenfeld, Spassky Variation, Main line, 13.Bd3
• 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 0-0 8. Ne2 c5 9. 0-0 Nc6 10. Be3 cxd4 11. cxd4 Bg4 12. f3 Na5 13. Bd3

• D90 Gruenfeld, Three Knights Variation
• 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3

• D91 Gruenfeld, Three Knights Variation
• 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Bg5

• D92 Gruenfeld, 5.Bf4
• 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Bf4

• D93 Gruenfeld with 5.Bf4 0-0 6.e3
• 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Bf4 0-0 6. e3

• D94 Gruenfeld, 5.e3
• 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5.e3

• D95 Gruenfeld with 5.e3 0-0 6.Qb3
• 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. e3 0-0 6. Qb3

• D96 Gruenfeld, Russian Variation
• 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3

• D97 Gruenfeld, Russian Variation with 7.e4
• 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 0-0 7. e4

• D98 Gruenfeld, Russian, Smyslov Variation
• 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 0-0 7. e4 Bg4

• D99 Gruenfeld Defence, Smyslov, Main line
• 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 0-0 7. e4 Bg4 8. Be3 Nfd7 9. Qb3

Eco Code E: Indian Defences

• E00 Queen’s Pawn Game (including Neo-Indian Attack, Trompowsky Attack, Catalan Opening and others)
• 1. d4 Nf6 2. c4 e6

• E01 Catalan, Closed
• 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2

• E02 Catalan Open, 5.Qa4
• 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Qa4+

• E03 Catalan Open, Alekhine Variation
• 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Qa4+ Nbd7 6. Qxc4 a6 7. Qc2

• E04 Catalan Open, 5.Nf3
• 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Nf3

• E05 Catalan Open, Classical line
• 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Nf3 Be7

• E06 Catalan Closed, 5.Nf3
• 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Nf3

• E07 Catalan, Closed, 6…Nbd7
• 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O Nbd7

• E08 Catalan Closed 7.Qc2
• 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O Nbd7 7. Qc2

• E09 Catalan Closed, Main line
• 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O Nbd7 7. Qc2 c6 8.Nbd2

• E10 Queen’s Pawn Game 3.Nf3
• 1. d4 Nf6 2. c4 e6 3. Nf3

• E11 Bogo-Indian Defence
• 1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+

• E12 Queen’s Indian Defence
• 1. d4 Nf6 2. c4 e6 3. Nf3 b6

• E13 Queen’s Indian, 4.Nc3, Main line
• 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.Nc3 Bb7 5.Bg5 h6 6.Bh4 Bb4

• E14 Queen’s Indian, 4.e3
• 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. e3

• E15 Queen’s Indian, 4.g3
• 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3

• E16 Queen’s Indian, Capablanca Variation
• 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Bb4+

• E17 Queen’s Indian, 5.Bg2 Be7
• 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7

• E18 Queen’s Indian, Old Main line, 7.Nc3
• 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. 0-0 0-0 7. Nc3

• E19 Queen’s Indian, Old Main line, 9.Qxc3
• 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. 0-0 0-0 7. Nc3 Ne4 8. Qc2 Nxc3 9. Qxc3

• E20 Nimzo-Indian Defence
• 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4

• E21 Nimzo-Indian, Three Knights Variation
• 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3

• E22 Nimzo-Indian, Spielmann Variation
• 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qb3

• E23 Nimzo-Indian, Spielmann, 4…c5, 5.dxc5 Nc6
• 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qb3 c5 5. dxc5 Nc6

• E24 Nimzo-Indian, Sämisch Variation
• 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3

• E25 Nimzo-Indian, Sämisch Variation, Keres Variation
• 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 c5 6. f3 d5 7. cxd5

• E26 Nimzo-Indian, Sämisch Variation, 4.a3 Bxc3+ 5.bxc3 c5 6.e3
• 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 0-0 6. e3

• E27 Nimzo-Indian, Sämisch Variation, 5…0-0
• 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 O-O

• E28 Nimzo-Indian, Sämisch Variation, 6.e3
• 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 O-O 6. e3

• E29 Nimzo-Indian, Sämisch Variation, Main line
• 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 0-0 6. e3 c5 7. Bd3 Nc6

• E30 Nimzo-Indian, Leningrad Variation
• 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Bg5

• E31 Nimzo-Indian, Leningrad Variation, Main line
• 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Bg5 h6 5.Bh4 c5 6.d5 d6

• E32 Nimzo-Indian, Classical Variation (4.Qc2)
• 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2

• E33 Nimzo-Indian, Classical Variation, 4…Nc6
• 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 Nc6

• E34 Nimzo-Indian, Classical, Noa Variation (4…d5)
• 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5

• E35 Nimzo-Indian, Classical, Noa Variation, 5.cxd5 exd5
• 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 exd5

• E36 Nimzo-Indian, Classical, Noa Variation, 5.a3
• 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. a3

• E37 Nimzo-Indian, Classical, Noa Variation, Main line, 7.Qc2
• 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. a3 Bxc3+ 6. Qxc3 Ne4 7. Qc2

• E38 Nimzo-Indian, Classical, 4…c5
• 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 c5

• E39 Nimzo-Indian, Classical, Pirc Variation
• 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 c5 5. dxc5 0-0

• E40 Nimzo-Indian, 4.e3
• 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3

• E41 Nimzo-Indian, 4.e3 c5
• 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5

• E42 Nimzo-Indian, 4.e3 c5, 5.Ne2 (Rubinstein)
• 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Ne2

• E43 Nimzo-Indian, Fischer Variation
• 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6

• E44 Nimzo-Indian, Fischer Variation, 5.Ne2
• 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Nge2

• E45 Nimzo-Indian, 4.e3, Bronstein Variation
• 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Ne2 Ba6

• E46 Nimzo-Indian, 4.e3 0-0
• 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 0-0

• E47 Nimzo-Indian, 4.e3 0-0, 5.Bd3
• 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 0-0 5. Bd3

• E48 Nimzo-Indian, 4.e3 0-0, 5.Bd3 d5
• 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 0-0 5. Bd3 d5

• E49 Nimzo-Indian, 4.e3, Botvinnik System
• 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 0-0 5. Bd3 d5 6. a3 Bxc3+

• E50 Nimzo-Indian, 4.e3 0-0, 5.Nf3, without …d5
• 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 0-0 5. Nf3

• E51 Nimzo-Indian, 4.e3 0-0, 5.Nf3 d5
• 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 0-0 5. Nf3 d5

• E52 Nimzo-Indian, 4.e3, Main line with …b6
• 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 0-0 5. Nf3 d5 6. Bd3 b6

• E53 Nimzo-Indian, 4.e3, Main line with …c5
• 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 0-0 5. Nf3 d5 6. Bd3 c5

• E54 Nimzo-Indian, 4.e3, Gligoric System with 7…dxc4
• 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 0-0 5. Nf3 d5 6. Bd3 c5 7. 0-0 dxc4 8. Bxc4

• E55 Nimzo-Indian, 4.e3, Gligoric System, Bronstein Variation
• 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 0-0 5. Nf3 d5 6. Bd3 c5 7. 0-0 dxc4 8. Bxc4 Nbd7

• E56 Nimzo-Indian, 4.e3, Main line with 7…Nc6
• 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 0-0 5. Nf3 d5 6. Bd3 c5 7. 0-0 Nc6

• E57 Nimzo-Indian, 4.e3, Main line with 8…dxc4 and 9…Bxc4 cxd4
• 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 0-0 5. Nf3 d5 6. Bd3 c5 7. 0-0 Nc6 8. a3 dxc4 9. Bxc4 cxd4

• E58 Nimzo-Indian, 4.e3, Main line with 8…Bxc3
• 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 0-0 5. Nf3 d5 6. Bd3 c5 7. 0-0 Nc6 8. a3 Bxc3+ 9.bxc3

• E59 Nimzo-Indian, 4.e3, Main line
• 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 d5 6. Bd3 c5 7. O-O Nc6 8. a3 Bxc3 9. bxc3 dxc4 10. Bxc4

• E60 King’s Indian Defence
• 1. d4 Nf6 2. c4 g6

• E61 King’s Indian Defence, 3.Nc3
• 1. d4 Nf6 2. c4 g6 3. Nc3

• E62 King’s Indian, Fianchetto Variation
• 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. g3

• E63 King’s Indian, Fianchetto, Panno Variation
• 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. g3 0-0 6. Bg2 Nc6 7. 0-0 a6

• E64 King’s Indian, Fianchetto, Yugoslav System
• 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. g3 0-0 6. Bg2 c5

• E65 King’s Indian, Yugoslav, 7.0-0
• 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. g3 0-0 6. Bg2 c5 7. 0-0

• E66 King’s Indian, Fianchetto, Yugoslav Panno
• 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. g3 0-0 6. Bg2 c5 7. 0-0 Nc6 8. d5

• E67 King’s Indian, Fianchetto with …Nd7
• 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. g3 0-0 6. Bg2 Nbd7

• E68 King’s Indian, Fianchetto, Classical Variation, 8.e4
• 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. g3 0-0 6. Bg2 Nbd7 7. 0-0 e5 8. e4

• E69 King’s Indian, Fianchetto, Classical Main line
• 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. g3 0-0 6. Bg2 Nbd7 7. 0-0 e5 8. e4 c6 9. h3

• E70 King’s Indian, 4.e4
• 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4

• E71 King’s Indian, Makogonov System (5.h3)
• 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. h3

• E72 King’s Indian with e4 and g3
• 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. g3

• E73 King’s Indian, 5.Be2
• 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2

• E74 King’s Indian, Averbakh, 6…c5
• 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 c5

• E75 King’s Indian, Averbakh, Main line
• 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 0-0 6. Bg5 c5 7. d5 e6

• E76 King’s Indian, Four Pawns Attack
• 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4

• E77 King’s Indian, Four Pawns Attack, 6.Be2
• 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 0-0 6. Be2

• E78 King’s Indian, Four Pawns Attack, with Be2 and Nf3
• 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 0-0 6. Be2 c5 7. Nf3

• E79 King’s Indian, Four Pawns Attack, Main line
• 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 0-0 6. Be2 c5 7. Nf3 cxd4 8. Nxd4 Nc6 9. Be3

• E80 King’s Indian, Sämisch Variation
• 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3

• E81 King’s Indian, Sämisch, 5…0-0
• 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 0-0

• E82 King’s Indian, Sämisch, Double Fianchetto Variation
• 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 0-0 6. Be3 b6

• E83 King’s Indian, Sämisch, 6…Nc6 (Panno Variation)
• 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 0-0 6. Be3 Nc6

• E84 King’s Indian, Sämisch, Panno Main line
• 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 0-0 6. Be3 Nc6 7. Nge2 a6 8. Qd2 Rb8

• E85 King’s Indian, Sämisch, Orthodox Variation
• 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 e5

• E86 King’s Indian, Sämisch, Orthodox, 7.Nge2 c6
• 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 0-0 6. Be3 e5 7. Nge2 c6

• E87 King’s Indian, Sämisch, Orthodox, 7.d5
• 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 e5 7. d5

• E88 King’s Indian, Sämisch, Orthodox, 7.d5 c6
• 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 0-0 6. Be3 e5 7. d5 c6

• E89 King’s Indian, Sämisch, Orthodox Main line
• 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 0-0 6. Be3 e5 7. d5 c6 8. Nge2

• E90 King’s Indian, 5.Nf3
• 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3

• E91 King’s Indian, 6.Be2
• 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 0-0 6. Be2

• E92 King’s Indian, Classical Variation
• 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 0-0 6. Be2 e5

• E93 King’s Indian, Petrosian System, Main line
• 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 0-0 6. Be2 e5 7. d5 Nbd7

• E94 King’s Indian, Orthodox Variation
• 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 0-0 6. Be2 e5 7. 0-0

• E95 King’s Indian, Orthodox, 7…Nbd7, 8.Re1
• 1.d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 0-0 6. Be2 e5 7. 0-0 Nbd7 8. Re1

• E96 King’s Indian, Orthodox, 7…Nbd7, Main line
• 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 0-0 6. Be2 e5 7. 0-0 Nbd7 8. Re1 c6 9. Bf1 a5

• E97 King’s Indian, Orthodox, Aronin–Taimanov Variation (Yugoslav Attack / Mar del Plata Variation)
• 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 0-0 6. Be2 e5 7. 0-0 Nc6

• E98 King’s Indian, Orthodox, Aronin–Taimanov, 9.Ne1
• 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 0-0 6. Be2 e5 7. 0-0 Nc6 8. d5 Ne7 9. Ne1

• E99 King’s Indian, Orthodox, Aronin–Taimanov, Main
• 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 0-0 6. Be2 e5 7. 0-0 Nc6 8. d5 Ne7 9. Ne1 Nd7 10. f3