Stockfish.js 19.0.0, lite single-threaded WebAssembly build
Copyright 2026 Chess.com, LLC and Stockfish contributors.
License: GNU General Public License version 3 (see Copying.txt alongside this file).

Unmodified binaries copied from the stockfish@19.0.0 npm package:
https://registry.npmjs.org/stockfish/-/stockfish-19.0.0.tgz

Corresponding source, build scripts, and instructions:
https://github.com/nmrugg/stockfish.js/tree/9cb3e5066d48f1a35d792afeda36eff37ae60570
Source archive:
https://github.com/nmrugg/stockfish.js/archive/9cb3e5066d48f1a35d792afeda36eff37ae60570.tar.gz
Tag: v19.0.0
Build: node build.js --single-threaded --lite -f
See the pinned source README/build.js for Emscripten prerequisites.
Embedded NNUE network: nn-61e7af4bb97d (Chris Bao / sscg13)
https://tests.stockfishchess.org/nns?network_name=nn-61e7af4bb97d

SHA-256:
d3344124ab067fb0b90ee77873bb8e9fbf5fc01bc525fe714b0f942581e889e6  stockfish-19-lite-single.js
57ac2d72312aba346760e3f173f687a8c211208e97a87268436f7f0e10bb5387  stockfish-19-lite-single.wasm

Leaf Arcade serves these assets from its own static hosting. The opponent runs
on the player's device. No hosted engine API, inference billing, or accounts.