Chess ReviewFree Chess Analysis Board
Paste a FEN or PGN, explore variations, and read Stockfish 17.1's evaluation in real time.
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Free Chess Analysis Board
Analysis runs in your browser. Play any legal move to explore a variation, or step through an imported game.
Frequently asked questions
Is the analysis board free?
Yes. The engine runs inside your browser, so there is no server cost to pass on — no sign-up, no daily limit and no paid tier.
How do I load a position?
Paste a PGN to replay a whole game, paste a FEN to jump straight to a position, or just play moves from the starting position.
Can I share a position?
Yes. The position you are looking at is mirrored into the page URL, so copying the address bar opens the same board for whoever you send it to.