A free and strong UCI chess engine

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

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

Cute Chess is a graphical user interface, command-line interface and a library for playing chess.

Beautiful, powerful chess app for the Mac

Neural network-based chess engine capable of natural language commentary

Chess GUI

WebAssembly port of the strong chess engine Stockfish

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

《佳佳象棋 GGzero》 采用 alphazero 技术的中国象棋引擎

Sources of the official ChessX version.

Super aggressive chess engine

fastchess is a chess cli tool to run engine vs engine matches

Arasan chess engine

C++ chess library

PGN Mirror

Gigantua: Single Threaded - 2 Billion Moves/s Chess position enumerator

A simple chess engine to learn and play with

UCI chess engine, with NNUE trained from zero knowledge

Strong neural-network chess engine written in C++