Free chess tools
Stockfish 18 runs in your browser, so these are free to use without an account and without a daily limit — and the positions you analyse never leave your device.
Analysis board
Play through any position with Stockfish running in your browser. Paste a FEN or PGN, branch off, and see the evaluation move by move.
Next move calculator
Give it a position and it returns the strongest move, the evaluation, and — where a principle applies — the reason behind it.
Elo calculator
Work out the rating change from a result before you play it, and what score you need to reach a target rating.
Tools answer questions about one position. The review answers questions about your play.
Analyze your games free