A powerful, open-source chess engine.


Stockfish plays better and faster than humans. And it's one of the strongest chess engines in the world, appearing near or at the top of most chess engine rating lists.

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Open Source

Unlike most chess engines, Stockfish is open source (GPL license). That means you can read the code on GitHub, modify it, contribute back, and even use it in your own projects.

Stockfish on GitHub

Run Anywhere

You can use Stockfish on your computer running Windows, Mac OS X, or Linux, or on your iPhone, iPad, or Android device. So you can get world-class chess analysis, wherever you are.

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Stockfish is licensed under the GPL license. Website © 2010-2014 Daylen Yang. Stockfish icon by Klein Maetschke.