Queen's Pawn Game: Accelerated London System: what should White play?

In the Accelerated London System after Black develops the light-squared bishop, White's most effective continuation is the immediate central strike c4. While standard developing moves remain playable, c4 challenges Black's pawn structure directly, yielding an engine evaluation of +0.35 and the highest success rate among major options at 56.7% across 528K recorded games.

The strategic impact of c4

Although Nf3 is the most frequent choice with over 1.25M games (48.3%), c4 exerts earlier pressure on the d5 point. Striking the center before committing the kingside knight allows White to accelerate piece development toward the queenside. In the primary continuation c4 Nf6 Nc3 Nbd7 Nf3 e6, White establishes queenside presence with the knight on c3 while maintaining a solid center.

Direct piece exchanges with Bd3

The second most popular continuation is Bd3, appearing in 25.5% of games (660K recorded) with an evaluation of +0.18. This move invites an immediate resolution of the bishop tension, scoring 52.9% for White. Following the sample line Bd3 Bxd3 cxd3 e6 Nc3 Nd7, White accepts doubled d-pawns in exchange for open lines and straightforward central control.

Probing alternatives and classical development

Players seeking quieter setups often prefer Nf3, leading toward classical structures such as Nf3 e6 c4 Bd6 Bxd6 Qxd6 with a +0.14 evaluation. More aggressive or flexible options include Nd2 (5.1% of games, +0.20) and the immediate flank thrust g4 (0.7% of games, +0.20), illustrated by g4 Bg6 Nd2 e6 Ngf3 Nd7. These setups aim to harass the bishop on f5 before defining the central pawn structure.