English Opening: Agincourt Defense, Neo-Catalan Declined

An entry in the Encyclopedia of Chess Openings (ECO A14), reached after 9 half-moves: 1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Be7 5. O-O.

Black rook — Use ← → arrows or click moves to step through.

Black knight — Use ← → arrows or click moves to step through.

End of this line

No further variations branch from this position in our database. To explore neighbouring ideas:

About this opening

English Opening: Agincourt Defense, Neo-Catalan Declined is an opening in the Encyclopedia of Chess Openings, classified under code A14. ECO group A (A00–A99) covers flank and irregular openings, including the English, Bird, Réti and Dutch defences. This particular variation is reached after 9 half-moves from the starting position, with the move sequence 1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Be7 5. O-O.

It belongs to the English Opening family. Within that family this is a level-2 branch (the Agincourt Defense → Neo-Catalan Declined line). The immediate parent line is English Opening: Agincourt Defense, transitioned via 5.O-O.

The opening sequence in prose form: 1.c4 e6, 2.Nf3 d5, 3.g3 Nf6, 4.Bg2 Be7, 5.O-O. From this position the encyclopaedia records no further canonical continuations — practical play branches into unnamed transpositions or returns to the parent line for alternative ideas.