lichess

The one free/libre open-source online and offline chess game

Built for the love of chess, this app is open source and free for all.

- 150 000 individual users daily and growing fast.

- Play bullet, blitz, classical, and correspondence chess

- Play in arena tournaments

- Find, follow, challenge players

- See your games stats

- Practice with chess puzzles

- Many variants, available online and offline: Crazyhouse, Chess 960, King Of The Hill, Three-check, Antichess, Atomic chess, Horde, Racing Kings

- Game analysis with local computer evaluation

- Server computer analysis with move annotations and game summary

- Unlimited opening explorer

- Endgame tablebase explorer

- Play with offline computer

- Over The Board mode to play offline with a friend

- Standalone chess clock with multiple time settings

- Board editor

- Available in 80 languages

- Designed for both phones and tablets, supporting landscape mode

- 100% free, without ads, and opensource!

Just like https://lichess.org, this application is open source and free software (GPL v3). It is entirely free and without ads, now and forever.

Source code of the mobile application: https://github.com/veloce/lichobile

Source code of the website and server: https://lichess.org/source