Engine Asset Compliance

Chessiro uses Stockfish 18.0.8 lite-single for browser-side chess analysis. Stockfish.js and Stockfish are GPLv3 software. This page gives the license, source, and artifact details for the engine files served by Chessiro.

Distributed Engine Files

• stockfish-18-lite-single.js
• stockfish-18-lite-single.wasm
• stockfish-18-lite-worker.js

License And Source

The upstream Stockfish.js package files are served without Chessiro changes. The wrapper worker is served as source alongside the engine and implements Chessiro's FEN batch protocol around the UCI engine.

• GPLv3 license
• Source notice
• Asset manifest
• Source archive
• Source repository
• NPM package