Tree path 3 levels English Opening › Agincourt Defense › English Defense: Hartlaub Gambit Declined
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  2. English Opening A10
  3. Agincourt Defense A13
  4. English Defense: Hartlaub Gambit Declined A40 you are here
A40

English Defense: Hartlaub Gambit Declined

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Overview

English Defense: Hartlaub Gambit Declined is a gambit, classified under ECO code A40 within the Flank Openings family. As with all gambits, one side sacrifices material early — usually a pawn — in exchange for development, open lines, or initiative.

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 9 plies — specifically the moves 1. c4 e6 2. d4 b6 3. Nc3 Bb7 4. e4 f5 5. d5.

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

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
A40
Group
Flank Openings (A)
Plies
9
Parent
English Opening: Agincourt Defense

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.

Statistics from Lichess

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