lichess Free Online Chess

lichess dot org is a one hundred percent free and open source online chess platform that provides unlimited chess gameplay without advertisements or subscription fees. The platform offers multiple game formats including quick pairing lobby games, arena tournaments, Swiss system tournaments, simultaneous exhibitions, and correspondence chess with extended time controls. Players can choose from bullet, blitz, rapid, and classical time controls ranging from one minute to several hours per game. lichess features a comprehensive chess training section with tactical puzzles, opening explorer, stockfish powered analysis board, coordinate training, and study creation tools that allow users to build and share annotated game analysis. The platform maintains official chess ratings using the Glicko two rating system and provides global and country specific leaderboards across all time control categories. lichess also offers chess variants including Chess960, King of the Hill, Three check, Antichess, Atomic, Horde, and Racing Kings, along with a full game replay and broadcast system for following live grandmaster events.