Stockfish browser engine licensing and source
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Engine: Stockfish.js 19 Lite single-threaded (version 19.0.1 of the npm 'stockfish' package)
Copyright: The Stockfish developers and Stockfish.js contributors
License: GNU General Public License v3.0 (GPLv3)
Full license text: GPL-3.0.txt (in this same directory)

Official engine source: https://github.com/official-stockfish/Stockfish
WebAssembly browser build source: https://github.com/nmrugg/stockfish.js
Exact release package: https://www.npmjs.com/package/stockfish/v/19.0.1
To obtain the corresponding build source, check the repository for its tagged release and
the npm package corresponding to version 19.0.1. This site ships unmodified engine binaries.

The Stockfish engine is licensed separately from the site's design and content.
Distribution, modification, and combined-work obligations under GPLv3 may apply.
Ensure your licensing complies with GPLv3 before redistributing modified engine code.