COPYING.txt

Stockfish, Fairy-Stockfish and the fishnet client are free software;
you can redistribute them and/or modify them under the terms of the GNU General
Public License, version 3, as published by the Free Software Foundation.

You can find the source code at:

* https://github.com/official-stockfish/Stockfish
* https://github.com/ianfab/Fairy-Stockfish
* https://github.com/lichess-org/fishnet

These programs are distributed in the hope that they will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See LICENSE.txt for more details.