Nimzowitsch Defense: Franco-Nimzowitsch Variation: what to play after e6?

In the Franco-Nimzowitsch Variation of the Nimzowitsch Defense (ECO B00), White's most direct and principled option is d4, establishing a full classical pawn center. As the engine's primary recommendation with an evaluation of +0.74, d4 is chosen in 61.3% of recorded games (1.92M recorded) and yields a 54.9% score for White.

Establishing the Classical Center with d4

Occupying the d4 square immediately challenges Black's setup by taking space and facilitating development for White's pieces. In response, play often tests Black's central intentions, as shown in the illustrative continuation d4 d5 e5 f6 c3 fxe5. Here, White uses an advanced pawn chain to maintain spatial pressure while stabilizing the center with c3.

Alternative Approaches: Nc3 and Bb5

White also possesses natural piece-development options that avoid immediate central clarity. The solid developing move Nc3 appears in 20.9% of games (652K recorded), carrying a +0.49 evaluation and a 53.0% scoring rate, leading into lines such as Nc3 Nf6 d4 Bb4 Bd3 d5. Alternatively, White plays Bb5 in 16.0% of encounters (498K recorded, +0.14 evaluation), which scores 53.2% and targets the knight on c6 directly in lines like Bb5 a6 Bxc6 bxc6 d4 c5.

Rare Sidelines: g3 and c4

Less frequent setups include g3 and c4, each played in roughly one percent of recorded positions. The fianchetto via g3 occurs in 1.0% of games (31K recorded, +0.36 evaluation) and features the illustrative continuation g3 d5 e5 d4 Bg2 Qd5, scoring 53.1% for White. The flank thrust c4 is selected in 0.8% of games (26K recorded, +0.08 evaluation) and scores 53.7%, leading to open central skirmishes after c4 d5 exd5 exd5 cxd5 Qxd5.