The strongest chess engine in the world.


Stockfish is the strongest chess engine in the world. It is also much stronger than the best human chess grandmasters. You're getting the best in chess analysis.

View CCRL rating list

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.

View all downloads

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