Caissa Codex
D37

Queen's Gambit Declined: Three Knights 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: Three Knights Variation

The Three Knights Variation of the Queen's Gambit Declined is reached here by 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3, the move order by which it is most often played. Play White's moves of the line from memory — 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 — and the trainer plays Black's replies; "Play the other side" turns it around.

"Drill all" adds the 42 named lines that continue it, such as Queen's Gambit Declined: Ragozin Defense, Queen's Gambit Declined: Modern Variation, Normal Line, Queen's Gambit Declined: Semi-Tarrasch Defense, Queen's Gambit Declined: Harrwitz Attack, Queen's Gambit Declined: Three Knights, Vienna Variation, Queen's Gambit Declined: Neo-Orthodox Variation, Main Line, Queen's Gambit Declined: Orthodox Defense, Queen's Gambit Declined: Neo-Orthodox Variation.

Read about the line, its statistics on Lichess and Stockfish's evaluation on the Queen's Gambit Declined: Three Knights Variation page, or pick another opening in the opening trainer.

https://chesscodex.org/train/queens-gambit-declined-three-knights-variation