English Opening: Agincourt Defense 5…O-O 6. d4
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Statistics from Lichess
63,982 games: White 48.1% / Draw 6.7% / Black 45.2%
| Next move | Games | White / Draw / BlackW / D / B |
|---|---|---|
| 16,55917K | ||
| 16,34316K | ||
| 13,40213K | ||
| 6,1726,172 | ||
| 5,4065,406 | ||
| 1,5441,544 | ||
| 1,4201,420 | ||
| 725725 |
Rated Lichess games between players rated 1600 to 2500, from the Lichess opening explorer, updated Oct 31, 2026
Engine evaluation
+0.03 The position is about equal
Best play: 6... c5 7. Nc3 cxd4 8. Nxd4 dxc4 9. Bxc4 a6 10. Rc1 b5 11. Be2
Stockfish 19, depth 30, after the line's last move. Scores are in pawns, from White's side.
Overview
English Opening: Agincourt Defense (ECO A13, Flank Openings) is a variation of the English Opening: Agincourt Defense, reached after 1. c4 e6 2. Nf3 d5 3. b3 Nf6 4. Bb2 Be7 5. e3 O-O 6. d4 (6 moves).
In 63,982 rated Lichess games between players rated 1600 to 2500, White won 48.1%, Black 45.2% and 6.7% were drawn. Black's most played move here is 6…c5, in 26% of those games.
Written from the Lichess opening list and explorer. Know this line well? Write about it.
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How to answer 6. d4
6…b6 scores best for Black: 50.7%, with Black winning 47.2% and White 45.7% of 16K games. The most played, 6…c5, scores 48.8% in 17K games, and 6…c6 scores lowest: 46.6%. Stockfish's first choice is 6…c5.
Main answers: those played in at least 5% of these games. Score: Black's wins plus half the draws, in rated Lichess games between players rated 1600 to 2500. How to play against other popular openings
Cite this page
Caissa Codex. “English Opening: Agincourt Defense (A13)”. Lichess data as of 31 Oct 2026. https://chesscodex.org/openings/english-opening-agincourt-defense-5