Free, open-source chess platform with zero ads, zero paywalls, and a full suite of tools.
The world's strongest open-source chess engine, used in nearly every major platform.
Open-source neural network chess engine trained through self-play, with a distinctive style.
AI engine trained to predict human moves at specific Elo levels, for realistic sparring.
Open dataset of all Lichess games, available for free bulk download in PGN and other formats.
Online interface to Syzygy endgame tablebases, with perfect play for positions up to 7 pieces.
Wiki covering all aspects of chess engine programming, from search algorithms to evaluation.
Free open-source opening repertoire trainer with spaced repetition, for any PGN file.
Visualizes evaluation trends and lets you explore your games with engine commentary.
Free, open-source chess server with over 60 variants alongside standard chess.
Open-source strategy server with chess variants, draughts, Go, Backgammon, and more.
Free, open-source chess training app for tactics, opening drills, and game review.
Creates animated GIF, MP4, and WebM videos from a PGN game for sharing on social media.
Free, open-source chess database and analysis GUI for Windows, macOS, and Linux.
Free, open-source chess database and PGN viewer with a clean interface for game management.
Lichess classroom tool for teachers to create classes, assign students, and run tournaments.
Free browser tool to download and analyze your Lichess or Chess.com games with Stockfish.
Free offline chess training software with engines, tactics, openings, and a competition system.
