Third-party notices

GNU Backgammon (gnubg) 1.01 weights
-----------------------------------
weights/nets.bin.gz is a converted copy of gnubg.weights (the "GNU Backgammon 1.01"
neural-net weights file), packed into one gzipped binary by tools/convert-weights.js.
The evaluation code in src/engine/ is ported from GNU Backgammon source files,
each named in the comments of the ported blocks.

GNU Backgammon is Copyright (C) 1998-2004 Gary Wong <gtw@gnu.org> and
Copyright (C) 2004-2023 the AUTHORS: Joseph Heled, Oystein Johansen,
Jonathan Kinsey, David Montgomery, Jim Segrave, Joern Thyssen, Gary Wong,
Christian Anthon, Michael Petch, Philippe Michel (authors list from gnubg's
credits.sh; contributors are listed there too).

Licence: GNU General Public License version 3 (GPL-3.0). Full text:
https://www.gnu.org/licenses/gpl-3.0.html
Source: https://www.gnu.org/software/gnubg/

The reference positions in test/fixtures/gnubg.json were produced by running
GNU Backgammon 1.08.003; they are used only by the tests.

ZzFX
----
src/zzfx.js is ZzFX (Zuper Zmall Zound Zynth) by Frank Force, the author of
this project, under the MIT licence. https://github.com/KilledByAPixel/ZzFX
