Caissa Codex
A26

English Opening: King's English Variation, Closed System, Full Symmetry 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 English Opening: King's English Variation, Closed System, Full Symmetry

Play Black's moves of the line from memory — 1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 — and the trainer plays White's replies; "Play the other side" turns it around.

"Drill all" adds the 1 named line that continue it, such as English Opening: King's English Variation, Botvinnik System.

Read about the line, its statistics on Lichess and Stockfish's evaluation on the English Opening: King's English Variation, Closed System, Full Symmetry page, or pick another opening in the opening trainer.

https://chesscodex.org/train/english-opening-kings-english-variation-closed-system-full-symmetry