• It will always be free
• It will never contain advertisement
• It 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
• Castling
• En passant
• Promotion
• Check, Chekmate & Stalemate detection
• Move hints and validation
• Replay and analysis
• Export in PGN
• Translated to 13 languages, and more to come
• Run in any browser (excepted IE6, of course) 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 5.3.2 with Symfony2 & PHPUnit
• JavaScript with jQuery & UI
• HTML5 & CSS
• Ubuntu 10.04, nginx & Vim
• Crafty Chess engine
• pgn4web

Lichess works better with a modern browser like Firefox, Chrome, Safari or Opera.
To report a bug or request a new feature, please email me at .
Thanks for reading.