The English Opening: Agincourt Defense with e4 — A Guide for Black

The Agincourt Defense with e4 is built around a simple but effective idea. White has committed to both c4 and e4, staking out a broad pawn centre. Your second move 2...d5 challenges the e4 pawn directly, asking White to decide how to resolve the tension in the centre. This is the most principled approach — you refuse to let White build a big centre for free. The engine gives the position -0.10, a tiny edge for Black if anything. For you as Black, that means you have already equalised. Your task now is to maintain that equality through the early middlegame. The statistics back this up: across nearly a million games at this exact position, Black scores 45.2% wins compared to White's 50.8%, which is a respectable showing for the second player (especially considering the usual White advantage in opening statistics).

The engine's top choice here is exd5, capturing the pawn and opening the centre. The full recommended continuation is exd5 exd5 cxd5 Nf6. After 3.exd5 you recapture with 3...exd5 (maintaining your pawn on d5), and after White plays 4.cxd5, you develop with 4...Nf6, attacking the loose d5 pawn and bringing a knight toward the centre. Out of 177,749 games where White played 3.exd5, White scored only 50.3% — barely better than half, which is fantastic for Black. This continuation produces a balanced IQP (Isolated Queen's Pawn) middlegame where both sides have active piece play. Your dark-squared bishop will develop naturally to d6 or c5, and the open e-file gives your rook potential. The position remains tense but equal — exactly what you want as Black.

The statistics reveal three moves that White should avoid because they hand you an edge. Each one loses measurable advantage compared to the best move exd5: - Nc3 (36,305 games): A natural developing move, but it's an inaccuracy that loses about 0.9 pawns of advantage. White scores only 46.9% after this, meaning you outscore them from here. - d3 (19,930 games): This quiet, passive move loses about 0.6 pawns. White's score plummets to 39.1% — your best individual result among all White options. - d4 (6,234 games): Setting up a big pawn centre sounds logical, but it's actually an inaccuracy costing about 0.7 pawns. White scores just 44.5% here. If White plays any of these three, you can be confident you've already outplayed your opponent in the opening. Trust your position and keep developing naturally.

The most common move by far is 3.cxd5, seen in 694,323 games — far more than any other White reply. White captures on d5 with the c-pawn, leading to a French-like structure after 3...exd5 4.d4 (the most common follow-up). Black then gets a solid French-type position with the pawn chain e6-d5 against White's pawns on d4 and e4. White scores 52.1% here — their best statistical result, but still nothing crushing. Your plan is simple: develop your kingside pieces (Nf6), castle, and challenge the centre with ...c5 breaks later. You have a slightly cramped but very solid position with clear plans. The flexibility of the Agincourt means White must know what they're doing, or you'll outplay them with straightforward development.