Caissa Codex
A40

Kangaroo Defense: Keres Defense, Transpositional 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 Kangaroo Defense: Keres Defense, Transpositional Variation

Play White's moves of the line from memory — 1. d4 e6 2. c4 Bb4+ 3. Nc3 — 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 Kangaroo Defense: Keres Defense, Transpositional Variation page, or pick another opening in the opening trainer.

https://chesscodex.org/train/kangaroo-defense-keres-defense-transpositional-variation