/usr/share/games/dreamchess/themes/sketch.xml is in dreamchess-data 0.2.1-RC2-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 | <?xml version="1.0"?>
<themes>
<theme>
<name>Sketch</name>
<style>sketch</style>
<pieces>sketch</pieces>
<board>sketch</board>
</theme>
</themes>
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