Sicilian Defense: Old Sicilian: what should White play?

In the Sicilian Defense: Old Sicilian, the position after Black plays Na5 challenges the placement of the White c4. The most statistically successful and frequently played continuation for White is Be2, which is chosen in 43.8% of the 41,098 recorded games. This retreat preserves the bishop pair and maintains a solid central advantage, resulting in an engine evaluation of +0.87.

The strategic retreat of the bishop

The move Be2 is the primary choice for White, appearing in 21,000 games. By moving the bishop to the e2 square, White avoids the immediate trade for the Black a5 and prepares for a standard central breakthrough. The main line following this retreat is Be2 d6 d4 cxd4 Nxd4 Nf6, where White maintains a 52.4% scoring rate. This setup allows White to develop the remaining pieces while keeping the position flexible against Black's d6-pawn structure.

Alternatives and tactical complications

While Be2 is the engine's top recommendation, other options exist depending on White's desired level of aggression. The move Bb5 is played in 14.6% of games, often leading to the sequence Bb5 a6 Be2 b5 d4 cxd4. This variation forces Black to commit the a-pawn early but results in a lower White scoring percentage of 45.4%. Alternatively, Bb3 is a common human choice (14.3% of games), inviting Black to capture the bishop in exchange for an open a-file, as seen in the line Bb3 b5 c3 Nxb3 Qxb3 a5.

Positional considerations for Black

Black's maneuver with the a5 aims to disrupt White's development and eliminate the active c4. If White chooses the solid d3, Black often responds with d3 Ne7 Nc3 Nec6 a3 Nxc4, effectively trading the knight for the bishop. This line occurs in 7.1% of games and yields a +0.27 evaluation. White must decide whether to preserve the bishop at the cost of time or allow the trade to maintain a more compact pawn structure.