French Defense: La Bourdonnais Variation: what should Black play?

In the French Defense: La Bourdonnais Variation (ECO C00), Black achieves the most thematic and theoretically sound counterplay by advancing d5. Recommended by engine evaluation at -0.21, this strike challenges White's central space immediately and is selected in 86.6% of recorded games (11M recorded). Black stakes an immediate claim in the center while exploiting the slight weakening of White's kingside caused by the advance of the f-pawn.

The Central Challenge with d5

The primary choice d5 directly confronts White's pawn on e4. From this position, White scores 48.2% across 11M recorded games, illustrating that Black comfortably disputes the center. An illustrative engine continuation features d5 d3 dxe4 dxe4 Qxd1+ Kxd1, leading directly to an early queen trade where White's king is pulled to d1. By liquidating the center early, Black neutralizes White's attacking ambitions along the f-file and ensures balanced piece activity.

Alternative Setups for Black

Black occasionally opts for flank counterplay with c5, chosen in 10.3% of games (1.26M recorded) with an engine evaluation of -0.14 and a 49.5% score for White. Play often transitions toward Sicilian-style structures after c5 Nf3 d5 d3 Be7 Be2, where Black can slowly build pressure against White's center. Less frequent choices include Be7, appearing in 3.1% of games (384K recorded) with an evaluation of -0.04 and a 49.4% White score, often continuing into Be7 Nc3 d5 d4 dxe4 Nxe4. Other engine-analyzed sidelines include Nh6 (eval +0.03) and a6 (eval +0.15), though neither matches the popularity or central impact of the primary strikes.