The Agincourt Defense, Keres Defense is a variation of the English Opening, catalogued as ECO A14. The line runs 1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Be7 5. O-O c5 6. cxd5 Nxd5 7. Nc3 Nc6, reaching the position shown below after 14 half-moves.
The four central squares are empty of pawns, so the fight for them is being conducted by pieces. Development is level at three minor pieces each. It is White to move after seven moves. White has castled while Black’s king is still uncommitted.
On the English Opening generally: A flexible opening where White controls the center with c4. Can transpose into many different systems.
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The Agincourt Defense, Keres Defense goes 1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Be7 5. O-O c5 6. cxd5 Nxd5 7. Nc3 Nc6. It is a variation of the English Opening and is catalogued as ECO A14.
The Agincourt Defense, Keres Defense is ECO A14. ECO codes group openings by their move order, so nearby codes cover closely related lines of the English Opening.
Stockfish evaluates the position after 1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Be7 5. O-O c5 6. cxd5 Nxd5 7. Nc3 Nc6 at +0.47 at depth 18, which is a slight pull for White, within normal opening margins. Engine evaluation is only a starting point — at club level the practical value of a line is mostly about whether you know its plans better than your opponent does.
The four central squares are empty of pawns, so the fight for them is being conducted by pieces. Development is level at three minor pieces each. It is White to move. White has castled while Black’s king is still uncommitted.