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'''Sloppy''',<br/>
an [[:Category:Open Source|open source chess engine]] by [[Ilari Pihlajisto]], written in [[C]] to build executables to run under [[Windows]], [[Linux]] and [[Mac OS|OS X]], compliant with the [[Chess Engine Communication Protocol]]. Sloppy is released under the [[Free Software Foundation#GPL|GPLv3]] license, and was first published in October, 2007 <ref>[http://ilaripih.mbnet.fi/sloppy/index.html Sloppy : Home]</ref>.
Sloppy is full of [[Bit-Twiddling|low-level trickery]] with [[General Setwise Operations|bitwise operators]], efficient [[Data|data structures]] and [[Algorithms|algorithms]] <ref>[http://www.twitchysynapse.com/software.php#sloppy Twitchy Synapse - Sloppy]</ref>. Starting with [[Rotated Bitboards|rotated bitboards]] <ref>[https://github.com/cutechess/sloppy/blob/master/CHANGES sloppy/CHANGES at master · cutechess/sloppy · GitHub]</ref>,
it uses [[Magic Bitboards|magic bitboards]] based on [[Pradu Kannan|Pradu Kannan's]] implementation <ref>[https://github.com/cutechess/sloppy/blob/master/src/magicmoves.c sloppy/magicmoves.c at master · cutechess/sloppy · GitHub]</ref> to determine [[Sliding Piece Attacks|sliding piece attacks]].
Sloppy '''0.2.0''', released in February 2008, supports [[Daniel Shawul|Daniel Shawul's]] [[Scorpio Bitbases]] <ref>[http://www.talkchess.com/forum/viewtopic.php?t=19432 Sloppy 0.2.0 released] by [[Ilari Pihlajisto]], [[CCC]], February 06, 2008</ref>.
