C42

Petrov's Defense: Three Knights Game trainer

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 Petrov's Defense: Three Knights Game

The Three Knights Game of the Petrov Defense (1.e4 e5 2.Nf3 Nf6 3.Nc3) is a quiet way for White to meet the Petrov. Play White's moves of the line from memory — 1. e4 e5 2. Nf3 Nf6 3. Nc3 — and the trainer plays Black's replies; "Play the other side" turns it around.

"Drill all" adds the 4 named lines that continue it, such as Four Knights Game: Spanish Variation, Rubinstein Variation, Henneberger Variation, Four Knights Game: Spanish Variation, Rubinstein Variation, Four Knights Game: Spanish Variation, Symmetrical Variation, Tarrasch Variation, Four Knights Game: Spanish Variation, Gunsberg Counterattack.

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