Owen Defense: what should White play?

In the Owen Defense after Black develops the queenside bishop, White's strongest theoretical choice is d4, claiming full control over the center. Occupying d4 yields an engine evaluation of +0.82 and a 52.6% scoring rate for White across 1.80M recorded games (44.8% of the position's 4.02M total encounters). By establishing classical pawns on e4 and d4, White directly blunts the influence of the b7 and prepares natural development for the remaining minor pieces.

Central Expansion with d4

Advancing with d4 takes immediate advantage of Black's non-confrontational setup. The move stakes a claim over key central squares, allowing White's dark-squared bishop free mobility while supporting the knight on c3. An illustrative engine continuation demonstrates White's spatial edge: d4 e6 Bd3 Nf6 h4 d6. In this pathway, White secures harmonious piece coordination while gradually expanding across the board.

The Popular Alternative Nf3

Despite the objective strength of the central pawn push, Nf3 is the most frequent choice in the database, appearing in 53.9% of games (2.16M recorded). This continuation achieves a 51.2% score and an engine evaluation of +0.53. In the sample line Nf3 e6 d4 Bb4 Bd3 Nf6, play routinely transposes into standard central structures where White eventually advances the d-pawn under slightly modified tactical conditions.

Sidelines and Prophylaxis

White also maintains viable sidelines such as Nge2 (eval +0.60), illustrated by Nge2 e6 d4 Nf6 e5 Ng8, which avoids blocking the f-pawn and retains flexibility. Other choices include the aggressive flank advance h4 (eval +0.56) seen in h4 c5 Nf3 e6 d4 cxd4, as well as the quiet prophylaxis a3, played in 1.4% of games (56K recorded) with an evaluation of +0.41 and a 50.8% score, demonstrated by a3 c5 Nge2 e6 d4 cxd4.