Nimzowitsch Defense: what should Black play?

In the Nimzowitsch Defense after White's advance with the f-pawn, Black's most effective continuation is the central counterstrike d5. Although e5 is the most frequent choice in practice—occurring in 57.4% of recorded games (1.05M recorded)—d5 achieves the engine's highest evaluation of -0.18. By challenging the center immediately, Black exploits the slight weakening of the white kingside caused by the early pawn advance.

Central Counterplay with d5

Selecting d5 accounts for 27.2% of games (497K recorded) in the database, with White scoring 48.8% from this position. By thrusting the d-pawn into d5, Black forces immediate interaction in the center while maintaining active piece play. The principal engine continuation demonstrates this pressure through d5 exd5 Qxd5 Nc3 Qe6+ Qe2, where the queen emerges early to challenge White directly along the e-file.

The Popular Strike with e5

The most common continuation among human players is e5, carrying an evaluation of -0.09 and leading to a 49.4% scoring rate for White. This move strikes at White's pawn structure directly, frequently leading to sharp complications. The engine highlights the illustrative continuation e5 Nf3 exf4 d4 g5 d5, where Black accepts the pawn on f4 and reinforces it on g5 before White advances centrally.

Alternative Setups

Black can also consider d6, played in 14.4% of games (264K recorded), which produces an evaluation of +0.29 and a 53.1% score for White. This solid option often transitions into lines such as d6 Nc3 e5 Nf3 Nd4 d3. More marginal tries include the flank development Nh6 at +0.42, which can lead to Nh6 Nc3 Nd4 Nf3 c5 Bc4, and the cautious a6, chosen in 1.0% of games (19K recorded) with an evaluation of +0.55.