Chess Puzzle Practice: credits and licenses

CHESS PIECE ARTWORK
The chess pieces are the "Cburnett" set by Colin M. L. Burnett (Wikimedia Commons user Cburnett),
https://commons.wikimedia.org/wiki/Category:SVG_chess_pieces
The author offers them under a choice of GFDL, CC BY-SA 3.0, BSD or GPL. This site uses them under the BSD license:

Copyright (c) Colin M. L. Burnett. All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
following conditions are met:
Redistributions of source code must retain the above copyright notice, this list of conditions and the following
disclaimer.
Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following
disclaimer in the documentation and/or other materials provided with the distribution.
Neither the name of the author nor the names of its contributors may be used to endorse or promote products derived
from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
NO EVENT SHALL THE AUTHOR AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

PUZZLE POSITIONS
Many positions come from the Lichess puzzle database, https://database.lichess.org/#puzzles, released under the
Creative Commons CC0 license. Each such question links to its puzzle on lichess.org. Rule questions (castling,
en passant, promotion, stalemate) and king and pawn endings use positions made for this site.

NOT AFFILIATED
Chess Puzzle Practice is not affiliated with or endorsed by the University Interscholastic League (UIL) or Texas
Tech University. It contains no official UIL test questions.