This is a Sugar front end to the gnuchess program. More details on gnuchess can be found at: http://www.gnu.org/software/chess/ and http://www.gnu.org/software/chess/manual/ Some of the artwork comes from the Gcompris chess program. Other artwork was inspired in part by: http://lovesexandthermonuclearwar.wordpress.com/2012/04/04/assorted-chess-tools/ Detailed copyright and license information can be found /COPYING and /LICENSE. In the event this file has been separated from the rest of Sugar GNU Chess, please note that these files have been dual licensed under the Apache License v2.0 or GPLv3.