Nimzowitsch Defense: what should White play?

In the Nimzowitsch Defense (ECO B00), White's top engine recommendation is d4, claiming the full center directly on move two. With an evaluation of +0.45 and a 51.5% scoring performance across 16M recorded games, this advance capitalizes on Black's non-standard knight deployment to seize spatial dominance. Taking immediate control of central squares offers White an optimal theoretical foundation against Black's flank-oriented opening.

The Strategic Value of Seizing the Center

Establishing two pawns abreast with d4 challenges Black to prove compensation for conceding space. In the engine's primary illustrative continuation, d4 d5 e5 Bf5 c3 e6, White closes the center with a pawn chain on e5 and reinforces d4 with a classical pawn structure. This setup allows White to dictate the terms of engagement while Black seeks active outposts outside the pawn chain.

Major Alternatives for White

While central expansion is standard, White frequently adopts transpositional approaches. The development Nf3 leads in volume with 22M recorded games (scoring 52.3%, eval +0.16) and often transitions into standard open games via Nf3 e5 Bb5 Nf6 O-O Nxe4. Similarly, Nc3 appears in 4.98M recorded games with a 52.7% score (eval +0.09), leading to calm central battles such as Nc3 e5 Bc4 Nf6 d3 Bc5.

Positional Sidelines

White can also challenge Black's piece coordination immediately with Bb5, seen in 1.16M recorded games (scoring 50.6%, eval -0.05). This move can prompt early structural shifts, as demonstrated in Bb5 d5 e5 Bd7 Bxc6 bxc6, where White trades the light-squared bishop to double Black's c-pawns. A slower waiting option like h3 carries an engine evaluation of -0.03, illustrated by h3 Nf6 Nc3 e5 Nf3 Bb4. However, d4 remains the most proactive and statistically sound method to assert an opening advantage.