ECO A13 · English Opening

English Opening: Agincourt Defense, Catalan Defense Accepted

1. c4 e6 2. Nf3 Nf6 3. g3 d5 4. Bg2 dxc4

abcdefgh87654321
White to move. The arrow shows Stockfish’s best move.
Best move

5. Qa4++0.39

White is slightly better. Stockfish 18, depth 18.

Analyze this position

In the English Opening: Agincourt Defense, Catalan Defense Accepted (A13), reached after 1. c4 e6 2. Nf3 Nf6 3. g3 d5 4. Bg2 dxc4, Stockfish 18 recommends 5. Qa4+ for White. White is slightly better (+0.39).

Top engine moves

  1. +0.395. Qa4+ Bd7 6. Qxc4 c5 7. d4 Nc6 8. O-O Qb6 9. dxc5 Qxc5
  2. +0.295. O-O a6 6. Qc2 Nbd7 7. Rd1 c5 8. Ne1 Be7 9. d3 cxd3
  3. +0.105. Na3 Bxa3 6. bxa3 Nc6 7. Bb2 Qd6 8. Rc1 e5 9. Rxc4 O-O

Frequently asked questions

What is the best move in the English Opening: Agincourt Defense, Catalan Defense Accepted?
After 1. c4 e6 2. Nf3 Nf6 3. g3 d5 4. Bg2 dxc4, Stockfish 18 at depth 18 recommends 5. Qa4+ for White, continuing Bd7 6. Qxc4 c5 7. d4 Nc6 8. O-O Qb6 9. dxc5 Qxc5. White is slightly better (+0.39). The next best moves are 5. O-O (+0.29) and 5. Na3 (+0.10).
Is the English Opening: Agincourt Defense, Catalan Defense Accepted a good opening?
Stockfish rates the position at +0.39: white is slightly better. Evaluations this early in the game are small, so practical results depend far more on knowing the plans and typical structures than on the engine's number.
What is the ECO code of the English Opening: Agincourt Defense, Catalan Defense Accepted?
A13. ECO codes classify chess openings from A00 to E99; A is the volume for flank openings.

Opening names from the Lichess opening book (CC0). Pieces by Colin M.L. Burnett (GPLv2+).