ECO B21

Sicilian Defense: Smith-Morra Gambit Declined, Alapin Formation

Sicilian Defense: Smith-Morra Gambit Declined, Alapin Formation is a chess opening classified under ECO B21. Its defining line here is 1. e4 c5 2. d4 cxd4 3. c3 Nf6.

Sicilian Defense: Smith-Morra Gambit Declined, Alapin Formation — board position♜♞♝♛♚♝♜♟♟♟♟♟♟♟♞♟♟♟♟♟♟♟♟♜♞♝♛♚♝♞♜

1. e4 c5 2. d4 cxd4 3. c3 Nf6

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The diagram shows the position after 1. e4 c5 2. d4 cxd4 3. c3 Nf6. 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.