Horwitz Defense: what to play after c5?

In this position from the Horwitz Defense, White faces an immediate challenge to the center from Black's c5 pawn. While the space-gaining push d5 earns the highest engine evaluation at +0.28, the classical development move Nf3 is the overwhelming practical choice, played in 58.5% of games (977K recorded) and scoring 51.6% for White. Selecting between central reinforcement, immediate space expansion, or natural piece development determines the character of the game.

Popular Alternatives in the Center

Rather than committing the center immediately, players most frequently develop pieces or transition toward Queen's Gambit structures. The move c4 is chosen in 20.2% of games (338K recorded) with an engine evaluation of +0.18 and a 51.1% score, often continuing with c4 d5 Nf3 Nc6 Nc3 Nf6. Meanwhile, natural piece deployment via Bd3 appears in 14.0% of games (234K recorded), yielding White's highest score among the options at 55.3% with an evaluation of +0.12. A more modest alternative, Be2, is seen in 2.3% of games (39K recorded) with an evaluation of +0.09 and a 52.4% score.

Developing with 3. Nf3

By far the most common path is Nf3, which develops a kingside piece while maintaining flexible central options. An illustrative engine line following this move runs Nf3 d5 c4 Nc6 cxd5 exd5, transposing into typical semi-open central play where White contests the d5 outpost.

The Engine Recommendation: 3. d5

Although played in only 5.0% of games (83K recorded) with a 47.5% score, d5 represents the engine's preferred continuation. This advance closes the center and seizes spatial superiority. An illustrative continuation is d5 exd5 Nc3 Nf6 Nge2 Be7, leading to an asymmetrical pawn structure where both sides focus on central piece coordination.