Chessy
Playing Black in the English Opening: Agincourt Defense Nf3
After 1.c4 e6 2.Nf3 Nf6, you've entered the Agincourt Defense — a solid, flexible setup that aims to neutralise White's first-move advantage before counterpunching in the centre. The engine gives White a tiny edge (+0.32), and across over 316,000 games Black scores a respectable 44.6% here. This page shows you what to expect against White's most popular replies, and points out the one move your opponent should never play. Jump into the interactive drill below to try the position yourself.
Play the English Opening: Agincourt Defense: Nf3 against the engine
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Create a free account →What You're Fighting For
The Agincourt Defense is all about symmetry and patience. By playing 1...e6 and 2...Nf6, you keep the centre flexible: you're ready to meet d4 with ...d5 (reaching a Queen's Gambit Declined structure), or to fianchetto your queen's bishop and build a solid, hypermodern setup. Your main idea is to let White commit to a central pawn structure first, then challenge it. Statistically, you win 44.6% of the time from here — and with White's edge at just +0.32, you're never worse than slightly uncomfortable.
The Critical Tabiya: White's Most Popular Replies
White has several good options, and knowing the difference between them is your main task. Here's what you face most often: - Nc3 (99,314 games): The natural developing move, scoring 50.7% for White. Play 3...d5 and you're in a standard Queen's Gambit Declined. - d4 (84,958 games): White stakes out the centre. Answer with 3...d5 and transpose to a QGD or a Slav-style structure (depending on whether c4-cxd5 happens). White scores 50.6% here — extremely balanced. - g3 (77,305 games): White's engine-approved best move, scoring a tougher 53.4% for White. This is the line you'll want to know best: White will fianchetto with Bg2, and your plan is ...b6 and ...Bb7 to fight for the long diagonal. - e3 (23,577 games): Dull but solid for White (50.2%). Prepare for ...d5 and a slow manoeuvring game. - b3 (12,544 games): A Queen's Indian-style setup. White scores 55.1% here — your highest challenge. Meet it with ...Bb4 or ...d5 and be ready for a fight.
The One Move Your Opponent Might Blunder
Among all the moves White can play, one stands out as a clear mistake: d3. It's an inaccuracy that costs White roughly 0.6 pawns in engine evaluation. Across only 8,461 games, White's score drops to 46.0% — the only move where White wins less than half the time. If you see 3.d3, you should be encouraged: you're already doing better than the statistics suggest. The engine's recommendation here is g3, so if White plays d3 instead, they've given away a chunk of their opening advantage. Develop naturally (3...d5 or 3...c5) and the position will favour you.
How the Engine Punishes d3
Let's be concrete: after 3.d3, the engine's best move is 3...g3. Wait — that's White's best move, not yours. Sorry for the confusion. What the engine means is that White should have played g3 instead of d3. From Black's perspective, after 3.d3, simply continue developing: 3...d5 and aim to complete development. The point is that White's pawn on d3 blocks their own dark-squared bishop and doesn't help contest the centre. Black's score already jumps to 54.0% (since White's win rate drops to 46.0%). Keep it simple — build your centre and finish your development before launching any attacks.
Results across 316,714 Lichess games
| Most-played continuation | Games | White wins |
|---|---|---|
| Nc3 | 99,314 | 50.7% |
| d4 | 84,958 | 50.6% |
| g3 | 77,305 | 53.4% |
| e3 | 23,577 | 50.2% |
| b3 | 12,544 | 55.1% |
| d3 | 8,461 | 46.0% |
Frequently asked questions
Is the English Opening: Agincourt Defense Nf3 good for Black?
Yes, it's a perfectly sound opening for Black. The engine gives White only a +0.32 advantage, and Black wins 44.6% of games from this exact position. You're slightly worse but very much in the game, with lots of room to outplay your opponent in the middlegame.
What is the best reply to 1.c4 e6 2.Nf3 Nf6?
White's engine-approved best move is 3.g3, scoring 53.4% for White. But more common are 3.Nc3 and 3.d4, both scoring around 50.7%. The move to hope for is 3.d3, which is an inaccuracy that drops White's win rate to just 46.0%.
Should Black play ...d5 or ...b6 after 3.g3?
Both are playable, but the engine's recommended setup after 3.g3 is 3...b6 followed by 4...Bb7, fighting for the long diagonal against White's Bg2. This is the standard Agincourt fianchetto plan. If you prefer a more classical approach, 3...d5 is also fine.
Why is 3.d3 a mistake for White?
White's d3 blocks the dark-squared bishop and fails to challenge the centre effectively. The engine says White loses about 0.6 pawns of advantage compared to the best move (g3). Statistically, White's win rate drops to 46.0% — the only sub-50% score among White's options.
How many games feature the English Opening: Agincourt Defense: Nf3?
Over 316K Lichess games have reached the English Opening: Agincourt Defense: Nf3 position. White wins 51.2%, Black wins 44.6%, with 4.2% draws — based on real rated games.