• lichess.org will always be free
• lichess.org will never contain advertisement
• lichess.org will always be open-source

The purpose of Lichess is to provide a minimalist Chess game. It requires no registration. You don't need to create an account. It requires no Flash and can be run from any modern web browser.

Lichess provides following features:

• Multiplayer
• Single player with Artificial Intelligence
• Time control with Chess clock, including Fisher increments
• Chess variants: Standard and Chess960
• Premoves
• Moretime
• Castling, En passant, Promotion
• Check, Chekmate & Stalemate detection
• Threefold repetition
• Integrated chat
• Move hints and validation
• Replay and analysis
• Spectator mode
• Export in PGN
• Translated to 50 languages
• Run in any browser (excepted IE7) without flash

Lichess is OpenSource, and licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License.

It means you may read the code, modify, use and distribute it. You may NOT use it for commercial purposes. You may NOT display ads on a page where Lichess is displayed.

Get source code on Lichess repository or download it. Lichess is built using only Open Source software, including:

• PHP 5.3 with Symfony2
• JavaScript with jQuery & UI
• HTML5 & CSS
• Archlinux, Nginx & Vim
• Crafty Chess engine
• pgn4web

Lichess works better with a modern browser like Firefox, Chrome, Safari or Opera.

Want to improve the FAQ? It happens there http://github.com/ornicar/lichess/wiki/_pages