A free and strong UCI chess engine

lichess.org former mobile application / new one -> github.com/lichess-org/mobile

Play chess in any terminal. Rust TUI, Stockfish, Lichess.

Distributed Stockfish analysis for lichess.org

chess variant engine supporting Xiangqi, Shogi, Janggi, Makruk, S-Chess, Crazyhouse, Bughouse, and many more

Beautiful, powerful chess app for the Mac

Stockfish NNUE (Chess evaluation) trainer in Pytorch

Chess website to review games, play, learn and analyze for free on any device with Stockfish !

WebAssembly port of the strong chess engine Stockfish

Integrates the Stockfish chess engine with Python

WintrChess ♟️

The strong open source chess engine Stockfish compiled to JavaScript and WebAssembly using Emscripten

Sanmill is an open-source, UCI-like Mill/Morris/Merrills/Mühle/Malom (and its variants) program with CUI and Flutter GUI, sharing and freely distributing the code, tools and data needed to deliver this mill game. We do this because we are convinced that open software and open data are key ingredients to make rapid progress.

Advanced Chess Assistance System for Chess.com, Lichess.org, Pychess.org and more. Hassle-free 1-click install, no downloading. All devices and browsers supported.

Chess Endgame Training: app to practice a variety of well organized set of chess endgames. From elementary to the most complex endgames, you can practice until you learn how to face all of them.

Generate chess puzzles / tactics from a pgn file

Chess analysis tool powered by Stockfish and LLMs. Analyze PGN games, understand decision-making biases, train with puzzles, and play against the computer. 将博弈树搜索与自然语言生成结合的国际象棋分析工具，用于辅助棋手理解自己的决策偏差。同时内置了很多与Lichess、chess.com、国象联盟类似的功能，并完全免费。

棋路 Lite 版本，支持多种象棋引擎

A bot for chess.com and lichess.org that automatically plays chess for you

Go (Golang) chess library: move generation with bitboards, PGN/FEN, UCI/Stockfish, opening books, image generation. Well-tested & fast.