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  3. Agincourt Defense A13
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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.

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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. A more detailed, human-written description is on the way — and you can speed it up by suggesting one yourself.

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Variations (5)

Related variations at the same level

Sister lines that share the same parent English Opening: Agincourt Defense:

Show all 15 sub-variations (full subtree)

https://test.av-webdevs.com/openings/english-opening-agincourt-defense-3