ECO Codes

The ECO Codes is a classification 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".

C23 Bishop's opening

1. e4 e5 2. Bc4
- C23 Bishop's opening, Philidor counter-attack
  1. e4 e5 2. Bc4 c6
- C23 Bishop's opening, Lisitsyn variation
  1. e4 e5 2. Bc4 c6 3. d4 d5 4. exd5 cxd5 5. Bb5+ Bd7 6. Bxd7+ Nxd7 7. dxe5 Nxe5 8. Ne2
- C23 Bishop's opening, Calabrese counter-gambit
  1. e4 e5 2. Bc4 f5
- C23 Bishop's opening, Calabrese counter-gambit, Jaenisch variation
  1. e4 e5 2. Bc4 f5 3. d3
- C23 Bishop's opening, Classical variation
  1. e4 e5 2. Bc4 Bc5
- C23 Bishop's opening, Lopez gambit
  1. e4 e5 2. Bc4 Bc5 3. Qe2 Nc6 4. c3 Nf6 5. f4
- C23 Bishop's opening, Philidor variation
  1. e4 e5 2. Bc4 Bc5 3. c3
- C23 Bishop's opening, Pratt variation
  1. e4 e5 2. Bc4 Bc5 3. c3 Nf6 4. d4 exd4 5. e5 d5 6. exf6 dxc4 7. Qh5 O-O
- C23 Bishop's opening, Lewis counter-gambit
  1. e4 e5 2. Bc4 Bc5 3. c3 d5
- C23 Bishop's opening, del Rio variation
  1. e4 e5 2. Bc4 Bc5 3. c3 Qg5
- C23 Bishop's opening, Lewis gambit
  1. e4 e5 2. Bc4 Bc5 3. d4
- C23 Bishop's opening, Wing gambit
  1. e4 e5 2. Bc4 Bc5 3. b4
- C23 Bishop's opening, MacDonnell double gambit
  1. e4 e5 2. Bc4 Bc5 3. b4 Bxb4 4. f4
- C23 Bishop's opening, Four pawns' gambit
  1. e4 e5 2. Bc4 Bc5 3. b4 Bxb4 4. f4 exf4 5. Nf3 Be7 6. d4 Bh4+ 7. g3 fxg3 8. O-O gxh2+ 9. Kh1
C24 Bishop's opening, Berlin defence

1. e4 e5 2. Bc4 Nf6
- C24 Bishop's opening, Greco gambit
  1. e4 e5 2. Bc4 Nf6 3. f4
- C24 Bishop's opening, Ponziani gambit
  1. e4 e5 2. Bc4 Nf6 3. d4
- C24 Bishop's opening, Urusov gambit
  1. e4 e5 2. Bc4 Nf6 3. d4 exd4 4. Nf3
- C24 Bishop's opening, Urusov gambit, Panov variation
  1. e4 e5 2. Bc4 Nf6 3. d4 exd4 4. Nf3 d5 5. exd5 Bb4+ 6. c3 Qe7+

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