Chess Analysis Board

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Stockfish

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rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1

Free Stockfish Analysis Board

Set up any chess position and see what Stockfish 18 makes of it. Play moves on the board, paste a FEN, or paste a PGN to step through a game. The engine runs in your browser and shows the evaluation with its three best lines. Click a line to play its first move.

Frequently Asked Questions

Is the analysis board free?

Yes. There is no limit and no account.

How do I read the evaluation?

The number is in pawns from White's side: +1.50 means White is better by about a pawn and a half, a minus sign means Black is better. M3 means mate in three moves.

What is a FEN?

A single line of text that describes a position: where every piece is, whose move it is, and castling rights. Chess.com and Lichess can both copy one from any game.

Can I share a position?

Yes. The position is part of the page address, so Copy link gives you a link that opens on it.

Can it review a whole game?

For move grades and an accuracy score, use the Game Analyzer. To get one best move for a position, use the Next Move Calculator.