ECO Codes

The ECO Codes is a clasification system for the chess openings moves. Below is a list of chess openings organized by the Encyclopaedia of Chess Openings (ECO) code. The openings

are divided in five volumes labeled from "A" through "E".

A00 Polish (Sokolsky) opening1. b4

A01 Nimzovich-Larsen attack1. b3

A02-A03 Bird's opening1. f4

A04-A09 Reti opening1. Nf3

A10-A39 English opening1. c4

A40-A41 Queen's pawn1. d4

A42 Modern defence, Averbakh system1. d4 d6 2. c4 g6 3. Nc3 Bg7 4. e4

A43-A44 Old Benoni defence1. d4 c5

A45-A46 Queen's pawn game1. d4 Nf6

A47 Queen's Indian defence1. d4 Nf6 2. Nf3 b6

A48-A49 King's Indian, East Indian defence1. d4 Nf6 2. Nf3 g6

A50 Queen's pawn game1. d4 Nf6 2. c4

A51-A52 Budapest defence1. d4 Nf6 2. c4 e5

A53-A55 Old Indian defence1. d4 Nf6 2. c4 d6

A56 Benoni defence1. d4 Nf6 2. c4 c5

A57-A59 Benko gambit1. d4 Nf6 2. c4 c5 3. d5 b5

A60-A79 Benoni defence1. d4 Nf6 2. c4 c5 3. d5 e6

A80-A99 Dutch1. d4 f5

B00 King's pawn opening1. e4

B01 Scandinavian (centre counter) defence1. e4 d5

B02-B05 Alekhine's defence1. e4 Nf6

B06 Robatsch (modern) defence1. e4 g6

B07-B09 Pirc defence1. e4 d6 2. d4 Nf6 3. Nc3

B10-B19 Caro-Kann defence1. e4 c6

B20-B99 Sicilian defence1. e4 c5

C00-C19 French defence1. e4 e6

C20 King's pawn game1. e4 e5

C21-C22 Centre game1. e4 e5 2. d4 exd4

C23-C24 Bishop's opening1. e4 e5 2. Bc4

C25-C29 Vienna game1. e4 e5 2. Nc3

C30-C39 King's gambit1. e4 e5 2. f4

C40 King's knight opening1. e4 e5 2. Nf3

C41 Philidor's defence1. e4 e5 2. Nf3 d6

C42-C43 Petrov's defence1. e4 e5 2. Nf3 Nf6

C44 King's pawn game1. e4 e5 2. Nf3 Nc6

C45 Scotch game1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4

C46 Three knights game1. e4 e5 2. Nf3 Nc6 3. Nc3

C47-C49 Four knights, Scotch variation1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4

C50 King's pawn game1. e4 e5 2. Nf3 Nc6 3. Bc4

C51-C52 Evans gambit1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4

C53-C54 Giuoco Piano1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3

C55-C59 Two knights defence1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6

C60-C99 Ruy Lopez (Spanish opening)1. e4 e5 2. Nf3 Nc6 3. Bb5

D00 Queen's pawn game1. d4 d5

D01 Richter-Veresov attack1. d4 d5 2. Nc3 Nf6 3. Bg5

D02 Queen's pawn game1. d4 d5 2. Nf3

D03 Torre attack (Tartakower variation)1. d4 d5 2. Nf3 Nf6 3. Bg5

D04-D05 Queen's pawn game1. d4 d5 2. Nf3 Nf6 3. e3

D06 Queen's Gambit1. d4 d5 2. c4

D07-D09 Queen's Gambit Declined, Chigorin defence1. d4 d5 2. c4 Nc6

D10-D15 Queen's Gambit Declined Slav defence1. d4 d5 2. c4 c6

D16 Queen's Gambit Declined Slav accepted, Alapin variation1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4

D17-D19 Queen's Gambit Declined Slav, Czech defence1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5

D20-D29 Queen's gambit accepted1. d4 d5 2. c4 dxc4

D30-D42 Queen's gambit declined1. d4 d5 2. c4 e6

D43-D49 Queen's Gambit Declined semi-Slav1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6

D50-D69 Queen's Gambit Declined, 4.Bg51. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5

D70-D79 Neo-Gruenfeld defence1. d4 Nf6 2. c4 g6 3. f3 d5

D80-D99 Gruenfeld defence1. d4 Nf6 2. c4 g6 3. Nc3 d5

E00 Queen's pawn game1. d4 Nf6 2. c4 e6

E01-E09 Catalan, closed1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2

E10 Queen's pawn game1. d4 Nf6 2. c4 e6 3. Nf3

E11 Bogo-Indian defence1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+

E12-E19 Queen's Indian defence1. d4 Nf6 2. c4 e6 3. Nf3 b6

E20-E59 Nimzo-Indian defence1. d4 Nf6 2. c4 e6 3. Nc3 Bb4

E60-E99 King's Indian defence1. d4 Nf6 2. c4 g6