Philidor Defense: what should White play?

In this Philidor Defense setup, White has adopted a flank development idea with an early queenside fianchetto preparation, leaving the e4 pawn targeted. The engine's top-ranked choice is Nc3 (evaluated at -0.13), which defends the attacked pawn while developing a minor piece toward the center. This move appears in 24.9% of games and awards White a 50.9% scoring rate across 93,488 recorded games in the database.

Solid Development with Nc3

Opting for Nc3 maintains central harmony by directly shielding e4 while keeping open paths for the remaining pieces. By addressing Black's pressure immediately, White prevents any tactical complications involving the capture on e4. The engine's illustrative continuation runs Nc3 g6 d4 exd4 Nxd4 Bg7, where White seizes central space with a timely push to d4 and establishes an active presence.

Popular Alternatives on Move Four

Despite the engine's preference for piece development, the database shows that players choose Bb2 most frequently, occurring in 38.4% of games with a 48.4% score and a -0.29 evaluation. This move allows Black to enter the tactical sequence Bb2 Nxe4 d4 d5 Nxe5 Nd7. Another frequent option is d3, seen in 32.5% of encounters (scoring 50.4%, evaluated at -0.08), leading into the line d3 Nc6 Bb2 g6 g3 Bg7.

Direct Central Action and Other Choices

White can also opt for immediate central confrontation via d4, which holds an engine evaluation of -0.06. Although played in only 1.9% of games (with a 50.2% score), it sparks central exchanges through d4 Nxe4 Bd3 d5 Bxe4 dxe4. Lastly, Qe2 constitutes 2.3% of recorded games (evaluated at -0.42, scoring 49.8%), proceeding along Qe2 g6 g3 c5 Bg2 Nc6.