ECO A28

English Opening: King's English Variation, Four Knights Variation, Korchnoi Line

English Opening: King's English Variation, Four Knights Variation, Korchnoi Line is a chess opening classified under ECO A28. Its defining line here is 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. a3.

English Opening: King's English Variation, Four Knights Variation, Korchnoi Line — board position♜♝♛♚♝♜♟♟♟♟♟♟♟♞♞♟♟♟♞♞♟♟♟♟♟♟♜♝♛♚♝♜

1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. a3

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The diagram shows the position after 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. a3. 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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