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Explanation
The Agincourt Defense begins when White advances the c-pawn to c4 and Black replies by moving the e-pawn to e6. Black's immediate idea is to prepare ...d5 and contest the center without revealing the complete piece setup.
This is a broad opening family rather than one fixed formation. Black may still develop the knight to f6, play ...c5, or build a queen's-pawn structure. White can choose Nf3, prepare a bishop development to g2, or advance the d-pawn. When different move orders reach the same position, the result is called a transposition.
A useful comparison is the . There Black answers with ...Nf6 first; in the Agincourt, ...e6 is the defining commitment. The next central decision matters more than the label: the game may open quickly with d4 and ...d5, or remain a flexible English Opening.
Usage and context
The name groups several continuations that share 1.c4 e6 before the central pawn structure becomes definite.
Common confusions
Agincourt and the Neo-Catalan
Agincourt is defined by 1.c4 e6. The Neo-Catalan requires a more specific development with Nf3, g3, and usually ...d5 and ...Nf6.
Sources
- 1.English Opening: Agincourt Defense, Chess.com
- 2.English Opening, Wikipedia