Chess pieces by Colin M. L. Burnett (Cburnett), Wikimedia Commons,
"SVG chess pieces/Standard transparent"
https://commons.wikimedia.org/wiki/Category:SVG_chess_pieces/Standard_transparent

The author offers these files under GFDL 1.2 or later, CC BY-SA 3.0, BSD and GPL 2 or later,
and states: "You may select the license of your choice." This site uses them under the BSD
licence (3-clause), reproduced below.

Copyright (c) 2006, 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:

1. Redistributions of source code must retain the above copyright notice, this list of
   conditions and the following disclaimer.
2. 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.
3. Neither the name of Colin M. L. Burnett 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 COLIN M. L. BURNETT 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 COLIN M. L. BURNETT OR
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.

Files and their sources (the white pieces are "lt45", the black pieces "dt45"):

wK.svg  https://commons.wikimedia.org/wiki/File:Chess_klt45.svg
wQ.svg  https://commons.wikimedia.org/wiki/File:Chess_qlt45.svg
wR.svg  https://commons.wikimedia.org/wiki/File:Chess_rlt45.svg
wB.svg  https://commons.wikimedia.org/wiki/File:Chess_blt45.svg
wN.svg  https://commons.wikimedia.org/wiki/File:Chess_nlt45.svg
wP.svg  https://commons.wikimedia.org/wiki/File:Chess_plt45.svg
bK.svg  https://commons.wikimedia.org/wiki/File:Chess_kdt45.svg
bQ.svg  https://commons.wikimedia.org/wiki/File:Chess_qdt45.svg
bR.svg  https://commons.wikimedia.org/wiki/File:Chess_rdt45.svg
bB.svg  https://commons.wikimedia.org/wiki/File:Chess_bdt45.svg
bN.svg  https://commons.wikimedia.org/wiki/File:Chess_ndt45.svg
bP.svg  https://commons.wikimedia.org/wiki/File:Chess_pdt45.svg

The files were optimised: comments, metadata, doctype and whitespace were removed, style
declarations became presentation attributes and a viewBox was added. The drawing (paths,
coordinates, transforms, colours) is unchanged; renders at 8x scale are pixel-identical.

Licence check: on 2026-11-05 each of the 12 file pages offered the BSD option. Every page's
licence section reads {{self|GFDL|migration=relicense|BSD|GPL}}, which Commons renders as GFDL 1.2+,
CC BY-SA 3.0 (added by the GFDL licensing update), BSD and GPL 2+, followed by "You may select the
license of your choice." Author on every page: Cburnett; date 2006-12-27.