ECO A13

English Opening: Agincourt Defense, Catalan Defense, Semi-Slav Defense

English Opening: Agincourt Defense, Catalan Defense, Semi-Slav Defense is a chess opening classified under ECO A13. Its defining line here is 1. c4 e6 2. Nf3 Nf6 3. g3 d5 4. Bg2 c6.

English Opening: Agincourt Defense, Catalan Defense, Semi-Slav Defense — board position♜♞♝♛♚♝♜♟♟♟♟♟♟♟♞♟♟♞♟♟♟♟♟♟♝♟♜♞♝♛♚♜

1. c4 e6 2. Nf3 Nf6 3. g3 d5 4. Bg2 c6

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The diagram shows the position after 1. c4 e6 2. Nf3 Nf6 3. g3 d5 4. Bg2 c6. Play through it move by move in the interactive explorer.

Opening name, ECO code, and main line come from the Lichess open chess openings dataset.

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