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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
A11
1. c4 c6
English, Caro-Kann defensive system
A12
1. c4 c6 2. Nf3 d5 3. b3
English, Caro-Kann defensive system