Philidor Defense: what should Black play?

In this position from the Philidor Defense, Black's best objective option according to engine evaluation is Nc6 (+0.99). The move develops a minor piece toward the center while defending e5 and preparing natural kingside development. Although Black must navigate a slight disadvantage after White's rapid castling, development remains the critical priority.

The strategic role of Nc6

Despite being the top engine choice, Nc6 appears in only 3.9% of the 232,486 recorded games in this database position (9.0K recorded), where White scores 58.5%. Black reinforces the central e5 pawn and keeps the queen on e7 safe from direct threats. A standard continuation highlighted by the engine is Nc6 Nc3 Nf6 h3 Be6 Nd5, where Black contests the central dark squares while White seeks an outpost on d5.

Popular human alternatives

By far the most common practical choice is Be6, played in 62.9% of games (146K recorded) with an evaluation of +1.05 and a 55.6% score for White. This move seeks an immediate trade of White's active bishop on c4, leading into lines such as Be6 Na3 g5 d4 g4 d5. Other players prefer solid pawn play with c6, chosen in 14.0% of games (32K recorded, evaluated at +0.93), which restricts White's knights and yields White's lowest score in the database at 47.6%.

Alternative piece developments

Black also frequently tests piece development with Bg4 and Nf6. The pin Bg4 accounts for 12.2% of games (28K recorded, eval +0.95), where White scores 52.8% and can proceed with Bg4 d4 Nc6 c3 Nf6 Re1. Meanwhile, Nf6 is seen in 7.1% of encounters (16K recorded, eval +0.91), prompting the central expansion Nf6 d4 c6 Nc3 Bg4 d5 where White scores 58.4%.