ECO A57

Benko Gambit Declined: Sosonko Variation

Benko Gambit Declined: Sosonko Variation is a chess opening classified under ECO A57. Its defining line here is 1. d4 Nf6 2. c4 c5 3. d5 b5 4. a4.

Benko Gambit Declined: Sosonko Variation — board position♜♞♝♛♚♝♜♟♟♟♟♟♟♞♟♟♟♟♟♟♟♟♟♟♜♞♝♛♚♝♞♜

1. d4 Nf6 2. c4 c5 3. d5 b5 4. a4

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The diagram shows the position after 1. d4 Nf6 2. c4 c5 3. d5 b5 4. a4. 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.