lichess

Are you passionate about chess and looking for a comprehensive, free, and open-source platform to sharpen your skills? Look no further than the one free/libre open-source online and offline chess game designed with love for the chess community. With a thriving user base of 150,000 daily active players and growing rapidly, this app is your gateway to the world of chess.

Whether you prefer the adrenaline rush of bullet chess, the strategic depth of blitz and classical games, or the thoughtful pace of correspondence chess, this app caters to all your chess-playing needs. Dive into the excitement of arena tournaments, where you can test your mettle against a diverse pool of players. Connect with the community by finding, following, and challenging players, and track your progress with detailed game statistics.

Sharpen your tactics with an array of chess puzzles designed to improve your game. Explore a variety of chess variants, both online and offline, including Crazyhouse, Chess 960, King of the Hill, Three-check, Antichess, Atomic chess, Horde, and Racing Kings. Enhance your understanding of the game with local computer evaluation for game analysis, and delve deeper with server computer analysis that provides move annotations and game summaries.

Navigate through an unlimited opening explorer and endgame tablebase to refine your strategies. When you're not connected, play against the offline computer or engage in over-the-board games with a friend using the dedicated offline mode. The app also features a standalone chess clock with multiple time settings and a board editor for creating custom positions.

Available in 80 languages and optimized for both phones and tablets, including landscape mode support, this app ensures a seamless chess experience on any device. Best of all, it's 100% free, without any ads, and fully open-source under the GPL v3 license, just like its web counterpart at lichess.org.

The source code for the mobile application can be found at https://github.com/veloce/lichobile, and the website and server code is available at https://lichess.org/source. The latest version, 8.0.0, updated on December 10, 2022, continues to bring new features, improvements, and bug fixes. For more details on releases, visit https://github.com/veloce/lichobile/releases.