Englund Gambit Declined: Diemer Counterattack trainer
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Practise the Englund Gambit Declined: Diemer Counterattack
Play Black's moves of the line from memory —
1. d4 e5 2. d5 Bc5 3. e4 Qh4 — and the trainer plays
White's replies; "Play the other side" turns it around.
Read about the line, its statistics on Lichess and Stockfish's evaluation on the Englund Gambit Declined: Diemer Counterattack page, or pick another opening in the opening trainer.