Caissa Codex
A41

Rat Defense: English Rat 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 Rat Defense: English Rat

Play Black's moves of the line from memory — 1. d4 d6 2. c4 e5 — and the trainer plays White's replies; "Play the other side" turns it around.

"Drill all" adds the 2 named lines that continue it, such as Rat Defense: English Rat, Lisbon Gambit, Rat Defense: English Rat, Pounds Gambit.

Read about the line, its statistics on Lichess and Stockfish's evaluation on the Rat Defense: English Rat page, or pick another opening in the opening trainer.

https://chesscodex.org/train/rat-defense-english-rat