Stockfish.js 19.0.0, lite single-threaded WebAssembly build.
Unmodified files from the stockfish@19.0.0 npm distribution.
Copyright 2026 Chess.com, LLC and the Stockfish contributors.
License: GNU GPL v3; see COPYING.txt in this directory.

Corresponding source and build instructions (exact upstream revision):
https://github.com/nmrugg/stockfish.js/tree/54fde71d90c7c403964f6cacef48f7bbec495df1
Source archive:
https://github.com/nmrugg/stockfish.js/archive/54fde71d90c7c403964f6cacef48f7bbec495df1.tar.gz
Neural network used by this lite build:
https://tests.stockfishchess.org/api/nn/nn-61e7af4bb97d.nnue
Build instructions are in the upstream README.md and build.js.

The application communicates with the independent engine through UCI text messages.
This engine integration does not connect to or license Chess.com's game database.

Full analysis build: Stockfish.js 19.0.1, full single-threaded WebAssembly.
Unmodified files from the pinned stockfish@19.0.1 npm distribution.
Corresponding source, neural networks and build instructions:
https://github.com/nmrugg/stockfish.js/tree/v19.0.1
https://github.com/nmrugg/stockfish.js/archive/refs/tags/v19.0.1.tar.gz
GPLv3; the same COPYING.txt applies. Single-threaded operation avoids requiring
cross-origin isolation for account sign-in and live classroom video.