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

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

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The English Opening: King's English Variation, Four Knights Variation, Korchnoi Line is a chess opening classified under ECO code A28 (Flank openings). It is a variation of the English Opening family. Step through the moves on the board above, then play the line yourself or review it with the built-in engine.