A free and strong UCI chess engine

lichess.org mobile application

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

A bridge between Lichess API and chess engines. Focussed on Docker in Heroku

UCI xiangqi engine

Beautiful, powerful chess app for the Mac

Distributed Stockfish analysis for lichess.org

Stockfish NNUE (Chess evaluation) trainer in Pytorch

Integrates the Stockfish chess engine with Python

WebAssembly port of the strong chess engine Stockfish

Responsive chess web GUI to play against the Stockfish 16 chess engine. Multiple web GUI implementations have also been included.

A strong Lichess Bot made in js that can be deployed to Heroku

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

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

Generate chess puzzles / tactics from a pgn file

棋路 Lite 版本，支持多种象棋引擎

Asynchronous PHP server that provides services of data and chess functionality to play online over a WebSocket connection.

Using engines running outside of the browser on https://lichess.org/analysis

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.

Creates chess puzzles from chess games and positions