Original characters, artwork and battle videos belong to their creators. The following third-party components keep their own licenses.
Stockfish.js 18.0.8, lite single-thread build, by Nathan Rugg, Chess.com and the Stockfish contributors. We distribute the unchanged worker and WebAssembly binary under GNU GPLv3.
Exact corresponding source and build scripts · Download corresponding source · Version and file hashes.
Build command from that source: node build.js --single-threaded --lite -f. Follow its build instructions for Emscripten and the required network weights.
PlayCanvas: MIT license. Traditional Staunton models by KillGorack, released under CC0, with local material and knight adjustments. Art sources and software notices.