ECO B28

Sicilian Defense: O'Kelly Variation, Yerevan System

Sicilian Defense: O'Kelly Variation, Yerevan System is a chess opening classified under ECO B28. Its defining line here is 1. e4 c5 2. Nf3 a6 3. Nc3.

Sicilian Defense: O'Kelly Variation, Yerevan System — board position♜♞♝♛♚♝♞♜♟♟♟♟♟♟♟♟♟♞♞♟♟♟♟♟♟♟♜♝♛♚♝♜

1. e4 c5 2. Nf3 a6 3. Nc3

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The diagram shows the position after 1. e4 c5 2. Nf3 a6 3. Nc3. 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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