Nimzo-Larsen Attack: Modern Variation: what should White play?

In the Modern Variation of the Nimzo-Larsen Attack, White has advanced the dark-squared bishop to e5 and reached a position recorded in 64,157 games. The top computer recommendation is e3, which scores an engine evaluation of +1.37 and solidifies the center while preparing kingside development. With Black eyeing the f2 weakness via c5, securing the center is an efficient route to maintaining a clear positional edge.

Strategic Priorities and King Safety

The primary idea behind e3 is blunting the diagonal of Black's dark-squared bishop on c5 while preparing future squares for the remaining minor pieces. The bishop on e5 is active, but White must attend to development and king safety before undertaking direct central action. Consolidating the pawn structure limits counterplay against the king and allows White to steadily mobilize the kingside.

Illustrative Continuations

The engine's primary line features e3 d5 Bb2 O-O Nf3 Re8, where the bishop retreats to safety on b2 as Black advances in the center. An immediate retreat via Bb2 shares the identical evaluation of +1.37, steering into Bb2 O-O Nf3 d5 e3 Re8. Another viable approach is the developing move Nf3 (+1.33), which frequently transposes into the same piece configuration after Nf3 d5 Bb2 O-O e3 Re8.

Alternative Central Approaches

White can also challenge the center immediately with d4 (+1.02), though this alters the character of the game after d4 Nc6 e3 Nxe5 dxe5 Ne4. Alternatively, retreating the bishop along the diagonal via Bg3 receives a +0.92 evaluation, leading into Bg3 O-O e3 d5 Nf3 Be7. While playable, these setups concede a fraction of White's advantage compared to the solid reinforcement offered by e3.