Stockfish.js 19.0.0 / Stockfish 19 Lite, unmodified single-threaded browser executable. Copyright: Stockfish authors and Nathan Rugg. License: GPL-3.0. License text: /vendor/stockfish-19-LICENSE.txt Corresponding source, NNUE/build tooling, and build instructions at exact package revision: https://github.com/nmrugg/stockfish.js/tree/54fde71d90c7c403964f6cacef48f7bbec495df1 Source archive: https://github.com/nmrugg/stockfish.js/archive/54fde71d90c7c403964f6cacef48f7bbec495df1.zip Build: npm run build-single-lite (see repository README and build.js prerequisites). Distribution: https://registry.npmjs.org/stockfish/-/stockfish-19.0.0.tgz Browser files: bin/stockfish-19-lite-single.js and bin/stockfish-19-lite-single.wasm. The CIX UI controls this separate engine through text UCI messages.