A13

English Opening: Agincourt Defense, Bogoljubow Defense

1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Bd6

The English Opening: Agincourt Defense, Bogoljubow Defense is a chess opening classified under ECO code A13. It is reached after the moves 1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Bd6.

It belongs to the English Opening family — one of many ways the line can branch. Understanding the parent system’s plans is the fastest way to play this variation well.

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