Open-Source Licenses

Chess Kings & Queens uses open-source software. This page lists the open-source programs chesskq.com sends to your browser under a license that asks us to tell you about it.

Stockfish.js

The chess engine that plays and analyses positions on chesskq.com is Stockfish.js, which runs in your browser. It is free software, released under the GNU General Public License, version 3 (GPLv3). Stockfish.js is based on Stockfish by T. Romstad, M. Costalba, J. Kiiski, G. Linscott and other contributors. We use it without modification.

Version

19.0.0

License

GNU General Public License v3.0

Source code

Stockfish.js 19.0.0 release · Stockfish.js repository · Stockfish repository

If any of these links stops working, email us at admin@chesskq.com and we will send you the complete source code for the version we use, free of charge.

Contact

Questions about this page? Email us at admin@chesskq.com.