Stockfish.js 19.0.1, unmodified lite single-threaded build. GPL-3.0.
Copyright 2026 Chess.com, LLC and the Stockfish contributors.
License: /dist/engine/COPYING.txt
Corresponding source (including build scripts):
https://github.com/nmrugg/stockfish.js/tree/0d5dd7944f88c817c07a26bc4fb1905d5f9c46d6
Source archive:
https://github.com/nmrugg/stockfish.js/archive/0d5dd7944f88c817c07a26bc4fb1905d5f9c46d6.tar.gz
Build: Emscripten 6.0.9; node build.js --single-threaded --lite
Embedded lite network: nn-61e7af4bb97d, by Chris Bao (sscg13).
https://tests.stockfishchess.org/api/nn/nn-61e7af4bb97d.nnue
Engine distribution: https://www.npmjs.com/package/stockfish/v/19.0.1