corechess

CoreChess is an open-source chess graphical interface designed for playing chess and interacting with external chess engines. It supports human-versus-engine, human-versus-human, and engine-versus-engine matches. Users can connect compatible engines to play against computer opponents or observe automated matches. The application supports the Universal Chess Interface (UCI) protocol, including engines such as Stockfish, Komodo, and Leela Chess Zero. It also supports the Chess Engine Communication Protocol (CECP), used by engines such as Crafty. Windows users can additionally configure The King engine from Chessmaster. CoreChess supports multiple opening book formats, including Polyglot BIN, Arena ABK, and Chessmaster OBK. It can be built for Windows, Linux, and macOS.