Caissa Codex
A48

Indian Defense: Colle System, King's Indian 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 Indian Defense: Colle System, King's Indian Variation

Play Black's moves of the line from memory — 1. d4 Nf6 2. Nf3 g6 3. e3 Bg7 4. Bd3 d6 — 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 Indian Defense: Colle System, King's Indian Variation page, or pick another opening in the opening trainer.

https://chesscodex.org/train/indian-defense-colle-system-kings-indian-variation