A free and strong UCI chess engine

Sunfish: a Python Chess Engine in 111 lines of code

Open source neural network chess engine with GPU acceleration and broad hardware support.

A chess library for Python, with move generation and validation, PGN parsing and writing, Polyglot opening book reading, Gaviota tablebase probing, Syzygy tablebase probing, and UCI/XBoard engine communication

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

UCI chess engine

Maia is a human-like neural network chess engine trained on millions of human games.

The Stockfish chess engine for web browsers

A bridge between Lichess bots and chess engines

WintrCat's Game Report ♟️

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

Chess analysis GUI for UCI engines, with extra features for Leela (Lc0) in particular.

irwin - the protector of lichess from all chess players villainous

Neural network-based chess engine capable of natural language commentary

A dependency-free chess engine♟️ library built to run anywhere.

A Rust-based re-write of the Stockfish Chess Engine

Ethereal, a UCI Chess Engine by Andrew Grant

ElephantEye - a XiangQi (Chinese Chess) Engine for XQWizard with Strong AI

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

WebAssembly port of the strong chess engine Stockfish

A strong javascript chess engine using WebWorkers

Integrates the Stockfish chess engine with Python

A Deep Learning UCI-Chess Variant Engine written in C++ & Python :parrot:

A highly customizable way to play chess in your terminal. Play online (via Lichess.org) and offline against the Fairy-Stockfish engine. All Lichess variants are supported.

Simple chess AI in JavaScript. Uses the chess.js and chessboard.js libraries.

elephantfish: 一个只有124行的中国象棋引擎

UCI Chess Engine written in C

A UCI compatible chess engine written in Golang

Competitive chess engine written in Rust

A cross-platform chess interface program that supports uci and ucci protocol engines / 支持uci和ucci协议引擎的跨平台象棋界面程序