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".
| ECO | Moves | Opening | ||
| A00 | 1. b4 | Polish (Sokolsky) opening | ||
| A01 | 1. b3 | Nimzovich-Larsen attack | ||
| A02-A03 | 1. f4 | Bird's opening | ||
| A04-A09 | 1. Nf3 | Reti opening | ||
| A10-A39 | 1. c4 | English opening | ||
| A40-A41 | 1. d4 | Queen's pawn | ||
| A42 | 1. d4 d6 2. c4 g6 3. Nc3 Bg7 4. e4 | Modern defence, Averbakh system | ||
| A43-A44 | 1. d4 c5 | Old Benoni defence | ||
| A45-A46 | 1. d4 Nf6 | Queen's pawn game | ||
| A47 | 1. d4 Nf6 2. Nf3 b6 | Queen's Indian defence | ||
| A48-A49 | 1. d4 Nf6 2. Nf3 g6 | King's Indian, East Indian defence | ||
| A50 | 1. d4 Nf6 2. c4 | Queen's pawn game | ||
| A51-A52 | 1. d4 Nf6 2. c4 e5 | Budapest defence | ||
| A53-A55 | 1. d4 Nf6 2. c4 d6 | Old Indian defence | ||
| A56 | 1. d4 Nf6 2. c4 c5 | Benoni defence | ||
| A57-A59 | 1. d4 Nf6 2. c4 c5 3. d5 b5 | Benko gambit | ||
| A60-A79 | 1. d4 Nf6 2. c4 c5 3. d5 e6 | Benoni defence | ||
| A80-A99 | 1. d4 f5 | Dutch | ||
| B00 | 1. e4 | King's pawn opening | ||
| B01 | 1. e4 d5 | Scandinavian (centre counter) defence | ||
| B02-B05 | 1. e4 Nf6 | Alekhine's defence | ||
| B06 | 1. e4 g6 | Robatsch (modern) defence | ||
| B07-B09 | 1. e4 d6 2. d4 Nf6 3. Nc3 | Pirc defence | ||
| B10-B19 | 1. e4 c6 | Caro-Kann defence | ||
| B20-B99 | 1. e4 c5 | Sicilian defence | ||
| C00-C19 | 1. e4 e6 | French defence | ||
| C20 | 1. e4 e5 | King's pawn game | ||
| C21-C22 | 1. e4 e5 2. d4 exd4 | Centre game | ||
| C23-C24 | 1. e4 e5 2. Bc4 | Bishop's opening | ||
| C25-C29 | 1. e4 e5 2. Nc3 | Vienna game | ||
| C30-C39 | 1. e4 e5 2. f4 | King's gambit | ||
| C40 | 1. e4 e5 2. Nf3 | King's knight opening | ||
| C41 | 1. e4 e5 2. Nf3 d6 | Philidor's defence | ||
| C42-C43 | 1. e4 e5 2. Nf3 Nf6 | Petrov's defence | ||
| C44 | 1. e4 e5 2. Nf3 Nc6 | King's pawn game | ||
| C45 | 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 | Scotch game | ||
| C46 | 1. e4 e5 2. Nf3 Nc6 3. Nc3 | Three knights game | ||
| C47-C49 | 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4 | Four knights, Scotch variation | ||
| C50 | 1. e4 e5 2. Nf3 Nc6 3. Bc4 | King's pawn game | ||
| C51-C52 | 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 | Evans gambit | ||
| C53-C54 | 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 | Giuoco Piano | ||
| C55-C59 | 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 | Two knights defence | ||
| C60-C99 | 1. e4 e5 2. Nf3 Nc6 3. Bb5 | Ruy Lopez (Spanish opening) | ||
| D00 | 1. d4 d5 | Queen's pawn game | ||
| D01 | 1. d4 d5 2. Nc3 Nf6 3. Bg5 | Richter-Veresov attack | ||
| D02 | 1. d4 d5 2. Nf3 | Queen's pawn game | ||
| D03 | 1. d4 d5 2. Nf3 Nf6 3. Bg5 | Torre attack (Tartakower variation) | ||
| D04-D05 | 1. d4 d5 2. Nf3 Nf6 3. e3 | Queen's pawn game | ||
| D06 | 1. d4 d5 2. c4 | Queen's Gambit | ||
| D07-D09 | 1. d4 d5 2. c4 Nc6 | Queen's Gambit Declined, Chigorin defence | ||
| D10-D15 | 1. d4 d5 2. c4 c6 | Queen's Gambit Declined Slav defence | ||
| D16 | 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 | Queen's Gambit Declined Slav accepted, Alapin variation | ||
| D17-D19 | 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 | Queen's Gambit Declined Slav, Czech defence | ||
| D20-D29 | 1. d4 d5 2. c4 dxc4 | Queen's gambit accepted | ||
| D30-D42 | 1. d4 d5 2. c4 e6 | Queen's gambit declined | ||
| D43-D49 | 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 | Queen's Gambit Declined semi-Slav | ||
| D50-D69 | 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 | Queen's Gambit Declined, 4.Bg5 | ||
| D70-D79 | 1. d4 Nf6 2. c4 g6 3. f3 d5 | Neo-Gruenfeld defence | ||
| D80-D99 | 1. d4 Nf6 2. c4 g6 3. Nc3 d5 | Gruenfeld defence | ||
| E00 | 1. d4 Nf6 2. c4 e6 | Queen's pawn game | ||
| E01-E09 | 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 | Catalan, closed | ||
| E10 | 1. d4 Nf6 2. c4 e6 3. Nf3 | Queen's pawn game | ||
| E11 | 1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ | Bogo-Indian defence | ||
| E12-E19 | 1. d4 Nf6 2. c4 e6 3. Nf3 b6 | Queen's Indian defence | ||
| E20-E59 | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | Nimzo-Indian defence | ||
| E60-E99 | 1. d4 Nf6 2. c4 g6 | King's Indian defence |