Benko Gambit Accepted: Modern Variation: what should White play?

In the Benko Gambit Accepted: Modern Variation, the optimal choice for White is Nc3, developing the queenside knight to control central squares while reinforcing the queenside. This move is favored in 77.5% of the 132,790 games recorded at this position, yielding an engine evaluation of +0.66 and a 49.8% scoring performance for White.

The Strategic Value of Nc3

The primary virtue of Nc3 is natural piece development alongside control over the d5 and e4 squares. Rather than immediately capturing on a6, White maintains the advanced pawn on b5, restricting Black's queenside activity and delaying easy piece mobilization. This flexible setup allows White to prepare central expansion while keeping defensive resources intact against Black's flank pressure.

Illustrative Continuations

A standard continuation following the main move proceeds with Nc3 Bg7 a4 Bb7 e4 e6, where White secures space on both the flank and the center. An immediate a4 is also viable, carrying an engine evaluation of +0.67 and a 52.4% score across 1.7% of recorded encounters, transposing to similar structures via a4 Bg7 Nc3 Bb7 e4 e6.

Alternative Options

White can also opt for Nf3, which appears in 6.7% of recorded games with an evaluation of +0.46 and a 46.2% score, typically leading toward Nf3 Bg7 Nc3 O-O a4 Bb7. The capture bxa6 represents the second most common choice, seen in 14.2% of games. However, bxa6 scores only 41.0% for White and drops the evaluation to +0.36, as seen in the illustrative line bxa6 Bxa6 Bxa6 Qa5+ Nc3 Nxa6, where Black rapidly develops queenside pieces along the opened files.