Caissa Codex
E39

Nimzo-Indian Defense: Classical Variation, Berlin Variation, Macieja System 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 Nimzo-Indian Defense: Classical Variation, Berlin Variation, Macieja System

Play Black's moves of the line from memory — 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 c5 5. dxc5 O-O 6. a3 Bxc5 7. Nf3 b6 — 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 Nimzo-Indian Defense: Classical Variation, Berlin Variation, Macieja System page, or pick another opening in the opening trainer.

https://chesscodex.org/train/nimzo-indian-defense-classical-variation-berlin-variation-macieja-system