Barnes Defense: what should White play?

In the Barnes Defense (ECO B00), White should play d4 to establish a classical pawn center and exploit Black's passive first move. Advancing the d-pawn seizes central territory directly, leading the engine evaluation at +1.49. This recommendation is also the overwhelming choice in practical play, selected in 48.3% of the 3.18M recorded games at this position and yielding a 57.7% score for White.

Establishing the classical center with d4

Black's move f6 does not contest central space, leaving White free to establish full control over e4 and d4. By advancing d4, White occupies the center and simultaneously opens lines of development for both the dark-squared bishop and the queen. An illustrative engine continuation demonstrates a standard setup: d4 e6 Nf3 d5 Bd3 Nc6. In this line, White calmly develops minor pieces to supportive squares, maintaining a clear spatial advantage.

Developing minor pieces as alternatives

While central expansion remains the engine's primary choice, natural piece development is also common and effective. The second most frequent try is Nf3, played in 38.7% of games (1.23M recorded) with an evaluation of +1.31 and a 55.1% score for White, featuring the sample continuation Nf3 Nh6 d4 Nf7 a3 e6. Alternatively, White can develop the queenside knight with Nc3, which accounts for 13.0% of games (413K recorded), evaluates at +1.38, and leads to lines such as Nc3 e5 Nge2 Nc6 d4 d6 where White scores 55.6%. Less frequent moves like Ne2 (+1.16) and a3 (+1.11) also retain positive evaluations, but direct central dominance via d4 remains the primary theoretical path.