English Opening: Agincourt Defense: what to play after e6?

In the English Opening: Agincourt Defense (ECO A13), the engine's highest-evaluated choice for White is d4, carrying an evaluation of +0.22. This central strike immediately contests space, transitioning the game toward Queen's Gambit structures while offering White a 54.5% scoring rate across 687K recorded games. Alternative setups like g3 and cxd5 remain deeply popular, but d4 directly challenges Black's central presence on d5.

Transposing to Central Setups with d4

Playing d4 represents 23.2% of the nearly 3 million recorded games in this position. By advancing the d-pawn, White claims parity in the center and discourages Black from expanding freely. The primary continuation generated by the engine runs d4 dxc4 Qa4+ Nd7 e4 c5, demonstrating how White swiftly recovers the pawn on c4 using the queen while establishing a broad pawn center.

The Fianchetto Approach with g3

The most frequently selected move in the database is g3, played in 28.8% of encounters (854K recorded) with an engine evaluation of +0.04 and a 56.9% score for White. Rather than locking or immediately contesting the center with pawns, White prepares to place the light-squared bishop on the long diagonal. The engine's illustrative line continues g3 dxc4 Bg2 a6 O-O Nf6, entering classic Catalan-style configurations where White relies on long-term piece pressure against Black's queenside.

Clarifying the Center with cxd5 or e3

White also frequently resolves the tension early via cxd5, seen in 26.1% of games (774K recorded, evaluating at +0.01 and scoring 52.2%). An illustrative continuation is cxd5 exd5 d4 c6 Bf4 Bf5, which yields a symmetrical pawn structure reminiscent of the Slav Exchange. Alternatively, e3 accounts for 21.8% of games (eval +0.00, scoring 54.3%), where play may proceed along positional paths such as e3 Nf6 d4 b6 b3 Bb7.