Philidor Defense: what should White play?

In this position from the Philidor Defense, White achieves the strongest central pressure by playing d4. Recommended by chess engines with a +0.77 evaluation, this central strike directly challenges Black's modest setup while exploiting the tempo Black spent on pawn moves. The move is the most popular choice in the database, appearing in 28.5% of games (3.18M recorded) and yielding a 55.5% score for White.

Central confrontation with d4

Striking immediately with d4 takes advantage of Black's passive pawn structure on d6 and h6. Rather than allowing Black time to complete piece development comfortably, White contests the e5 outpost and opens lines for the remaining pieces. An illustrative continuation demonstrating this central liquidation runs d4 exd4 Nxd4 Nf6 Nc3 Be7, where White maintains active pieces and an enduring spatial advantage in the center.

Classical development alternatives

White can also opt for natural development before committing the central pawns. Securing the king via O-O accounts for 23.8% of games (2.65M recorded) with an evaluation of +0.51 and a 52.4% score, leading into lines such as O-O Nf6 d4 Nbd7 h3 Be7. Developing the queenside knight with Nc3 is another frequent path, seen in 23.2% of games (2.58M recorded) with a +0.34 evaluation and a 53.6% score, as shown in the variation Nc3 c5 d3 Nf6 h3 Be7.

Positional approaches with c3 or h3

Another strategic plan is c3, played in 15.0% of games (1.67M recorded), which scores 55.2% and carries a +0.52 evaluation. This move prepares to support a broad pawn center and can lead to active queen deployment, as in the sequence c3 Nf6 d4 Nbd7 Qb3 Qe7. Lastly, the quiet h3 is chosen in 9.6% of games (1.07M recorded) with a +0.39 evaluation and a 53.8% score, following the line h3 Nf6 O-O Be7 Re1 O-O.