Stockfish 10

Strong open source chess engine

10 Years of Stockfish!

Graph showing ELO performance of major Stockfish versions

10 years ago, Stockfish 1.0 was released.
Thank you to all of our contributors and users in our amazing community.


Stockfish is one of the strongest chess engines in the world. It is also much stronger than the best human chess grandmasters.

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Open Source

Unlike most chess engines, Stockfish is open source (GPL license). That means you can read the code, 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, OS X, or Linux, or on your iOS 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- Daylen Yang. Stockfish icon by Klein Maetschke.