Nimzowitsch Defense: Colorado Countergambit

1.
1. e4
2. Nc6
2.
3. Nf3
4. f5

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The Nimzowitsch Defense: Colorado Countergambit is a chess opening classified under ECO code B00 (Semi-Open games). It is a variation of the Nimzowitsch Defense family. Step through the moves on the board above, then play the line yourself or review it with the built-in engine.