Caissa Codex
D02

Queen's Pawn Game: London System, Pterodactyl Variation 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 Queen's Pawn Game: London System, Pterodactyl Variation

Play Black's moves of the line from memory — 1. d4 g6 2. Nf3 Bg7 3. Bf4 c5 4. c3 cxd4 5. cxd4 Qa5+ — 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 Queen's Pawn Game: London System, Pterodactyl Variation page, or pick another opening in the opening trainer.

https://chesscodex.org/train/queens-pawn-game-london-system-pterodactyl-variation