How it works
From a position to the best move
- Paste a FEN, or paste the PGN of a game to load its final position.
- Set who is to move if it is not already correct, then read the best move from the callout.
- Stockfish draws the best move as an arrow and lists the alternatives with their evaluation.
- Play the move on the board and keep exploring the continuation, all in your browser.
FAQ
Frequently asked questions
How does it find the best move?
Stockfish, the strongest open-source chess engine, analyzes the position live in your browser. The move it ranks first is the best move; it is shown as an arrow on the board, with the evaluation and the full continuation.
Can I upload a screenshot of my game?
Yes. Drop a screenshot of a 2D board from Chess.com, Lichess or any board and we recognize the position, then you confirm whose turn it is and read the best move. You can also paste a FEN or PGN.
Is it free?
Yes. Finding the best move is completely free, with no account and no limits. The engine runs in your browser; nothing is uploaded or stored.
Which engine does it use?
Stockfish, compiled to run directly in your browser. You see the live evaluation, the best move and the alternative lines.
How do I find the best move from a screenshot of my game?
Drop a screenshot of any 2D board, from Chess.com, Lichess or an app, and the move solver reads the position. Confirm whose turn it is and Stockfish shows the best move as an arrow with the full line.
How is this different from the analysis board?
The analysis board is a blank board to explore lines from scratch. This chess calculator takes one position you supply (by screenshot, FEN or PGN) and answers a single question: what is the best move here. You can then play on and explore the continuation.
Want more than one move?
Review a whole game move by move with the free chess game review, explore lines on the chess analysis board, build your openings with the opening repertoire builder, check a rating with the chess Elo calculator, sharpen your tactics with free chess puzzles, or open the chessdesk workspace.