Tree path 4 levels English Opening › Agincourt Defense › English Opening: Agincourt Defense › English Opening: Agincourt Defense

Caissa Codex
English Opening A10
Agincourt Defense A13
English Opening: Agincourt Defense A13
English Opening: Agincourt Defense A13 you are here

A13

English Opening: Agincourt Defense

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Overview

English Opening: Agincourt Defense is a named branch in the Flank Openings group of chess theory, classified under ECO A13.

The Flank Openings group covers flank openings — systems that delay the central pawn break and instead develop pieces and pawns on the wings.

Play reaches this position via 1. c4 e6 2. Nf3 d5, after 4 plies of opening development.

In the opening tree, this line branches off from English Opening: Agincourt Defense, part of the broader English Opening system.

5 named variations grow from this line, including English Opening: Agincourt Defense, Catalan Defense, Catalan Defense, and others.

In total, the branch covers 15 sub-variations across all depths.

Use the board to walk through every move, check how the position has scored on Lichess, or take it head-to-head against Stockfish.

ECO code: A13
Group: Flank Openings (A)
Plies: 4
Parent: English Opening: Agincourt Defense
Direct variations: 5
Total in subtree: 15

This overview is generated automatically from the opening's metadata. Know this line well? Write a description — submissions are reviewed before publishing.

Statistics from Lichess

2,073,102 games · White 51.1% / Draw 6.5% / Black 42.4%

Moves	Games	W / D / B
g3	587,727
d4	438,211
e3	381,831
cxd5	361,065
b3	225,993
Nc3	56,456
d3	7,004
Qc2	6,797

Source: Lichess Opening Explorer · cached 2026-09-26 00:41:52

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Variations (5)

Show all 15 sub-variations (full subtree)

Overview

Statistics from Lichess

Variations (5)

Related variations at the same level