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=Derivatives=
In 2008, Norman Schmidt tried to distribute his ''Fruit and Toga'' derivative [[xyclOps]] commercially <ref>[http://www.talkchess.com/forum/viewtopic.php?t=22151 xyclOps 1.2 is available] by Norman Schmidt, [[CCC]], July 05, 2008</ref> until it was suspected as [[Clones:Category:Clone|clone]] by [[Matthias Gemuh]] and others <ref>[http://www.talkchess.com/forum/viewtopic.php?t=22276 xyclOps, a clone ?] by [[Matthias Gemuh]], [[CCC]], July 10, 2008</ref>. After Norman Schmidt freely volunteered to refund his customers <ref>[http://www.talkchess.com/forum/viewtopic.php?topic_view=threads&p=200082&t=22276 Re: xyclOps, a clone ?] by [[Norman Schmidt]], [[CCC]], July 11, 2008</ref> <ref>[http://www.talkchess.com/forum/viewtopic.php?t=22306 open apology to the chess engine community] by [[Norman Schmidt]], [[CCC]], July 12, 2008</ref>, he announced ''Cyclone based on Fruit and Toga'' as [[:Category:Open Source|open source engine]] <ref>[http://www.talkchess.com/forum/viewtopic.php?t=22619 Cylone 1.0 beta now available] by [[Norman Schmidt]], [[CCC]], July 27, 2008</ref>.
Further derivative programs by Norman Schmidt were ''TogaToy'' <ref>[http://www.talkchess.com/forum/viewtopic.php?t=28787 TogaToy 1.0] by [[Norman Schmidt]], [[CCC]], July 04, 2009</ref>, ''Cyclops'' <ref>[http://www.talkchess.com/forum/viewtopic.php?t=22794 Cyclone 1.0 and Cyclops 1.0 avaliable] by Norman Schmidt, [[CCC]], August 04, 2008</ref>, ''Alderon'', [[Demon]], and ''Crimson'', based on [[Viper]] <ref>[http://www.talkchess.com/forum/viewtopic.php?topic_view=threads&p=278427 Crimson 1.1 is a clone of Viper (and so is 1.0)] by [[Christopher Conkie]], [[CCC]], July 05, 2009</ref>,
and more recently [[Fridolin#Jinx|Jinx]] based on [[Fridolin]] <ref>[https://github.com/FireFather/jinx GitHub - FireFather/jinx: chess engine based on Fridolin 2.0]</ref>,
