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Mark Taylor

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=160 Nibble Challenge=
Mark Taylor worked with Levy to produce a program for a [ Hitachi] 4-bit [ CMOS] [ microcontroller]. The [[HMCS4xC|HD44801]] had 2K of 10-bit word [[Memory#ROM|ROM]], '''160''' [[Nibble|nibbles]] (80 bytes) of [[Memory#RAM|RAM]], running at 400 KHz. Levy developed a chess playing algorithm for this chip which played fully legal chess including [[Promotions|pawn promotion]], [[En passant|en passant capturing]], [[Castling|castling]], and even managed mate with KR v K in some versions all in 160 nibbles of RAM. A piece of work that Taylor is still rightly proud of today <ref>[ Chess Computers - The UK Story] from [ Chess Computer UK] by [[Mike Watters]]</ref>. The chip went into a series of small portable [[Saitek|SciSys]] machines - [[Mini Chess]], [[Mini Chess#Junior|Junior Chess]] and [[Mini Chess#Graduate|Graduate Chess]], all released in early 1981. The 4-bit program also initiated [[Eric White|Eric White's]] involvement in computer chess business and long time collaboration with Levy, when [ Hong Kong] based manufacturer ''White and Allcock'', forerunner of [[Newcrest Technology]] introduced the CXG brand with [[CXG Sensor Computachess]] in 1981 <ref>[ CXG Pocket Chess] from [ Wiki]</ref> <ref>[ CXG Sensor Computachess] from [ Wiki]</ref>.
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[[Category:Chess Programmer|Taylor]]

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