Nimzo-Indian Defense: Three Knights Variation, Korchnoi Variation

1.
1. d4
2. Nf6
2.
3. c4
4. e6
3.
5. Nc3
6. Bb4
4.
7. Nf3
8. c5
5.
9. d5

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The Nimzo-Indian Defense: Three Knights Variation, Korchnoi Variation is a chess opening classified under ECO code E21 (Indian defences). It is a variation of the Nimzo-Indian Defense family. Step through the moves on the board above, then play the line yourself or review it with the built-in engine.