Tree path 3 levels English Opening › Agincourt Defense › English Defense: Hartlaub Gambit Declined
- Chess Codex
- English Opening A10
- Agincourt Defense A13
- English Defense: Hartlaub Gambit Declined A40 you are here
English Defense: Hartlaub Gambit Declined
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
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
2,498 games · White 46.3% / Draw 3.3% / Black 50.4%
| Moves | Games | W / D / B |
|---|---|---|
| fxe4 | 1,172 | |
| Bb4 | 613 | |
| Nf6 | 427 | |
| exd5 | 143 | |
| Qf6 | 24 | |
| Be7 | 18 | |
| g6 | 17 | |
| Qe7 | 13 |
Source: Lichess Opening Explorer · cached 2026-09-26 01:57:35
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