arasan-chess/LICENSE at master · jdart1/arasan-chess · GitHub

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                        Arasan Chess Engine LICENSE

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Arasan chess engine software, including the contents of the src, book,
doc, prj, and tests directories of the software archive, is
distributed under the following License:

Copyright 1994-2026 by Jon Dart

 Permission is hereby granted, free of charge, to any person obtaining
 a copy of this software and associated documentation files (the
 "Software"), to deal in the Software without restriction, including
 without limitation the rights to use, copy, modify, merge, publish,
 distribute, sublicense, and/or sell copies of the Software, and to
 permit persons to whom the Software is furnished to do so, subject to
 the following conditions:

 The above copyright notice and this permission notice shall be
 included in all copies or substantial portions of the Software.

 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.

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Notes regarding the GUI:

The Arasan Windows user interface, the source of which is in the "gui"
directory, is also under this license, with the exception of the
"fonts" subdirectory, and the "chess-openings" subdirectory. The
fonts, which are loaded at runtime, are copyrighted, and use of those
outside of official Arasan releases will require a suitable license
from the copyright owner(s). The chess-openings subdirectory is a fork
of https://github.com/lichess-org/chess-openings/, and is under the
Creative Commons CC0 1.0 Universal license.

Official binaries of the Arasan Windows GUI installer, which include
the fonts, may be freely distributed, provided that:

1. It is distributed in unmodified form.
2. No more than a nominal fee is charged for copying or media.