Nimzowitsch Defense: what should Black play?

In the Nimzowitsch Defense after White develops the bishop with an early attack toward f7, Black's most effective engine choice is e6, which earns an evaluation of -0.26 and limits White to a 48.7% scoring rate across 1.17M recorded games (31.5% of games). This pawn advance blunts the light-squared bishop along the a2-g1 diagonal while preparing central expansion. While e5 is the most frequent choice in 37.6% of games (1.39M recorded), e6 provides a more solid foundational structure to neutralize White's early development.

The Strategic Value of e6

Playing e6 addresses the direct diagonal threat posed by the white bishop on c4 while leaving Black flexible to contest the center. The engine's illustrative continuation runs e6 d4 d5 exd5 exd5 Be2, where Black strikes immediately at White's central control and forces the light-squared bishop to retreat. By establishing a pawn on d5, Black secures central space and smooth pathways for pieces to develop.

Alternatives with Nf6 and e5

Developing via Nf6 is the second-best engine option at -0.11, appearing in 22.0% of games (816K recorded) where White scores 50.3%. The illustrative sequence Nf6 d3 e6 Nd2 d5 Bb5 shows Black applying pressure to the center while delaying the pawn confrontation. Meanwhile, the classical response e5 transposes into open game structures but yields a +0.12 evaluation, allowing White to score 53.3% in lines like e5 Nf3 Nf6 d3 Bc5 c3.

Passive Options

More passive setups yield a slight edge to White. Moves such as d6 (played in 7.1% of games, evaluated at +0.39) and a6 (1.9% of games, evaluated at +0.35) leave White with unhindered central expansion, as seen in d6 d4 e6 Nc3 Nf6 Nf3 and a6 d4 e6 Nc3 Bb4 a3.