Caissa Codex
C31

King's Gambit Declined: Falkbeer Countergambit, Nimzowitsch-Marshall Countergambit trainer

Back to the opening, all openings to practise or my repertoire

Type a move and press Enter: e4, Nf3, O-O, or from and to squares like g1f3 (e7e8q to promote). The board is also played with the mouse.

Practise the King's Gambit Declined: Falkbeer Countergambit, Nimzowitsch-Marshall Countergambit

Play Black's moves of the line from memory — 1. e4 e5 2. f4 d5 3. exd5 c6 — and the trainer plays White's replies; "Play the other side" turns it around.

"Drill all" adds the 1 named line that continue it, such as King's Gambit Declined: Falkbeer Countergambit, Pickler Gambit.

Read about the line, its statistics on Lichess and Stockfish's evaluation on the King's Gambit Declined: Falkbeer Countergambit, Nimzowitsch-Marshall Countergambit page, or pick another opening in the opening trainer.

https://chesscodex.org/train/kings-gambit-declined-falkbeer-countergambit-nimzowitsch-marshall-countergambit