Caissa Codex
D52

Queen's Gambit Declined: Cambridge Springs Defense, Bogoljubow Variation trainer

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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 Gambit Declined: Cambridge Springs Defense, Bogoljubow Variation

Play White's moves of the line from memory — 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 Nbd7 6. e3 Qa5 7. Nd2 Bb4 8. Qc2 — and the trainer plays Black'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 Gambit Declined: Cambridge Springs Defense, Bogoljubow Variation page, or pick another opening in the opening trainer.

https://chesscodex.org/train/queens-gambit-declined-cambridge-springs-defense-bogoljubow-variation