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".

A40 Queen's pawn

1. d4
- A40 Queen's pawn, Lundin (Kevitz-Mikenas) defence
  1. d4 Nc6
- A40 Queen's pawn, Charlick (Englund) gambit
  1. d4 e5
- A40 Queen's pawn, Englund gambit
  1. d4 e5 2. dxe5 Nc6 3. Nf3 Qe7 4. Qd5 f6 5. exf6 Nxf6
- A40 Queen's pawn, English defence
  1. d4 b6
- A40 Polish defence
  1. d4 b5
- A40 Queen's pawn
  1. d4 e6
- A40 Queen's pawn, Keres defence
  1. d4 e6 2. c4 b6
- A40 Queen's pawn, Franco-Indian (Keres) defence
  1. d4 e6 2. c4 Bb4+
- A40 Modern defence
  1. d4 g6
- A40 Beefeater defence
  1. d4 g6 2. c4 Bg7 3. Nc3 c5 4. d5 Bxc3+ 5. bxc3 f5
A41 Queen's Pawn

1. d4 d6
- A41 Old Indian, Tartakower (Wade) variation
  1. d4 d6 2. Nf3 Bg4
- A41 Old Indian defence
  1. d4 d6 2. c4
- A41 Modern defence
  1. d4 d6 2. c4 g6 3. Nc3 Bg7
- A41 Robatsch defence, Rossolimo variation
  1. e4 g6 2. d4 Bg7 3. Nf3 d6 4. c4 Bg4

ECO Codes

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