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Stockfish
Strong open-source chess engine
Download, documentation, technical details, and frequent questions.
- 2025-03-30: Stockfish 17.1
- 2024-09-06: Stockfish 17
- 2024-02-24: Stockfish 16.1
Strong
One of the strongest chess engines in the world. Winner of the Top Chess Engine Championship and Chess.com Computer Chess Championship, and consistently ranks highly on rating lists.
Community-Driven
Developed by a global community of chess enthusiasts and programmers and released under the GPLv3 license, so everyone can read the code, modify it, and contribute back.
Cross-Platform
Available on Windows, macOS, Linux, Android, and iOS. You can get world-class chess analysis wherever you are.
