Tree path 3 levels English Opening › Agincourt Defense › English Opening: Agincourt Defense
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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 variation within the Flank Openings family, indexed as 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.

The line arises from 3 plies — specifically the moves 1. c4 e6 2. Nf3.

It is a variation of English Opening: Agincourt Defense, which itself descends from the root opening English Opening.

It is the root of 10 named variations, with English Opening: Agincourt Defense, Catalan Defense Accepted, Catalan Defense, Semi-Slav Defense, and others among the most studied.

Together the deeper variations number 25 across the full subtree.

Step through the moves on the interactive board below, review the live Lichess statistics, or play this position against Stockfish at one of six difficulty levels.

ECO code
A13
Group
Flank Openings (A)
Plies
3
Parent
English Opening: Agincourt Defense
Direct variations
10
Total in subtree
25

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 (10)

Show all 25 sub-variations (full subtree)