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The first dedicated chess computer of Cassia was the [[Cassia Chess Mate]] in 1979, a [[Clones:Category:Clone|clone]] of [[Ron Nelson|Ron Nelson's]] [[Chess Challenger|Chess Challenger 10]] <ref>[http://www.hiarcs.net/forums/viewtopic.php?t=6768&start=122 Re: Ron Nelson] by [[Ron Nelson|ChessChallenger]], [[Computer Chess Forums|Hiarcs Forum]], December 24, 2015</ref> <ref>[http://www.schaakcomputers.nl/hein_veldhuis/database/files/09-1979%20%5BA-3976%5D%20Cassia%20-%20Chess%20Mate.pdf Cassia - Chess Mate], pdf hosted by [[Hein Veldhuis]] (Dutch)</ref>, also shipped as ''Toytronic Chess Electronics'' <ref>[http://www.schach-computer.info/wiki/index.php/Toytronic_Chess_Electronics Toytronic Chess Electronics] from [http://www.schach-computer.info/wiki/index.php/Hauptseite_En Schachcomputer.info Wiki] (German)</ref> <ref>[http://www.schaakcomputers.nl/hein_veldhuis/database/files/10-1979%20%5BA-5970%5D%20Toytronic%20-%20Chess%20Electronics.pdf Toytronic - Chess Electronics], pdf hosted by [[Hein Veldhuis]] (Dutch)</ref>, and ''CXG Computachess I'' <ref>[http://www.hiarcs.net/forums/viewtopic.php?t=6768&start=205 Re: Ron Nelson Chess Challenger 10] by [[Ron Nelson|ChessChallenger]], [[Computer Chess Forums|Hiarcs Forum]], January 24, 2016</ref>.

* [http://www.hiarcs.net/forums/viewtopic.php?t=6768&start=205 Re: Ron Nelson Chess Challenger 10] by [[Ron Nelson|ChessChallenger]], [[Computer Chess Forums|Hiarcs Forum]], January 24, 2016 » [[Cassia Chess Mate]] [[Clones:Category:Clone|clone]] of [[Chess Challenger|Chess Challenger 10]]