Getting started with AiChess

From your first game to revisiting a decision.

Try Stockfish as a guest with six difficulty levels and a choice of time controls. Computer levels are not certified Elo ratings. Sign in or register to challenge a friend, then share your game link.

After the result, open the review. The opening is identified from moves actually played; Stockfish compares decisions with alternatives. Select a move, compare before and after, and replay the continuation. A provisional judgement is not a certain conclusion.

Save a moment to your Path as a Bivio: try your idea, inspect the line and return to recall it. Study progress describes activity and recall, not competitive strength.

Guest sessions last up to 30 days. Synced games and progress are stored on the server, but the cookie identifies that session: clearing it or changing devices can break access. Registering within that session preserves its data. Signing in to an existing account does not automatically merge separate histories.

Password account recovery uses the code shown during registration: store it safely. No recovery email is simulated. Games, reviews and syncing require the server; built-in learning content in the app works offline.

Open AiChess