Caissa Codex
E12

Queen's Indian Defense: Petrosian 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 Queen's Indian Defense: Petrosian Variation

Play White's moves of the line from memory — 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 — and the trainer plays Black's replies; "Play the other side" turns it around.

"Drill all" adds the 12 named lines that continue it, such as Queen's Indian Defense: Kasparov-Petrosian Variation, Queen's Indian Defense: Kasparov-Petrosian Variation, Main Line, Queen's Indian Defense: Kasparov-Petrosian Variation, Marco Defense, Queen's Indian Defense: Kasparov-Petrosian Variation, Modern Variation, Queen's Indian Defense: Kasparov-Petrosian Variation, Classical Variation, Queen's Indian Defense: Kasparov-Petrosian Variation, Andersson Variation, Queen's Indian Defense: Kasparov-Petrosian Variation, Kasparov Attack, Queen's Indian Defense: Kasparov-Petrosian Variation, Petrosian Attack.

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

https://chesscodex.org/train/queens-indian-defense-petrosian-variation