Stockfish 19 (lite, single-threaded WebAssembly build), from Stockfish.js 19.0.0
https://github.com/nmrugg/stockfish.js  (npm: stockfish@19.0.0, files bin/stockfish-19-lite-single.js/.wasm)

Stockfish is free software licensed under the GNU General Public License v3 (see COPYING.txt).
Source code:
  - Stockfish:     https://github.com/official-stockfish/Stockfish
  - Stockfish.js:  https://github.com/nmrugg/stockfish.js/tree/v19.0.0

These files run unmodified as a separate program in a Web Worker on the chessmoments.com
analysis board (/analysis/), which talks to it over the UCI protocol.