Each engine on this page runs unmodified, on your own device, inside your browser. ChessBinder does not send your position to a server to be analysed. The calculation happens on your phone or computer.
Stockfish 19
The strongest free engine. Gives you the best move and how far ahead each side is.
- Licence: GNU General Public License v3
- Licence text we ship with this engine: Read the licence text
- Source code: https://github.com/nmrugg/stockfish.js
Stockfish 11 Classical
Judges a position with hand-written chess knowledge, not a neural network, the way engines did before 2020. Its scores match textbook ideas.
- Licence: GNU General Public License v3
- Licence text we ship with this engine: Read the licence text
- Source code: https://github.com/nmrugg/stockfish.js/tree/2b87d5d16a613f3ce05b1dd0bbb58465501ed30a
Questions
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