The chess best move calculator.
Set up any position, choose who is to move, and see the strongest next move in seconds. Powered by Stockfish 18, free, with no sign-up.
Calculate the best moveAny position
Play the moves from the start, paste a FEN or PGN, place pieces by hand, or scan a screenshot.
The move, in plain English
The best move appears in big type with a line such as "Knight g1 → f3" and an arrow on the board.
Three candidate moves
See the top three moves with evaluations and the lines behind them, so you can pick the one you understand.
How it works
- Open the board and set up your position.
- Choose White to move or Black to move.
- Read the best move. Press Play move to make it on the board.
Every feature is explained in the user guide.
Questions
Is the best move calculator free?
Yes. There is no account, no subscription and no advertising.
How strong is the engine?
It uses Stockfish 18, the strongest open-source chess engine, running in your browser. Even on Fast it plays far above any human.
Can I use it during a game?
No. Using an engine during a game against a person is cheating on every chess site and in every federation. Use it afterwards to learn.
Does it work on my phone?
Yes. The board works with touch and the engine runs on phones and tablets.