Chess+Champion+Mark+V

a dedicated chess computer manufactured by Scisys-W Ltd. [|Hong Kong] from 1981. Primary author of a Z80 based development version was David Broughton, while the translation to the 6502 production version was done by Mark Taylor. Both programmers were recruited into Levy's and O’Connell's company Philidor Software which was closely related to Winkler's Scisys-W Ltd. who manufactured and traded most of their computers until in summer 1981 Levy and O’Connell decided to loosen their relationship with SciSys and founded their new software company Intelligent Software.
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 * [[image:CCMarkV.jpg link="https://www.flickr.com/photos/10261668@N05/858179951/in/album-72157600922172552/"]] ||~  || **Chess Champion Mark V**,

In September 1981, the Chess Champion Mark V won the commercial group of the 2nd World Microcomputer Chess Championship in [|Travemünde], [|West Germany]. The Mark V had an [|LCD]-board, a striking, futuristic design and many new features. For instance, it could play simultaneously on up to 12 internal boards. The initial success could not be sustained with a strong upgrade. The Chess Champion Mark VI module that followed a year or two later was only marginally stronger than the Mark V. A piece recognition sensory board was planned and patented but after much delay SciSys released a flawed auto sensory board instead. The Mark VI and sensory board were a commercial flop. || toc =SX Algorithm= The Chess Champion Mark V was mentioned to use the first version of the SEX Algorithm then called SX Algorithm, which used fractional plies for extensions and reductions :
 * Chess Champion Mark V ||~  ||^   ||

While they started the first iteration of an ID framework with a SX-value of 10, which was incremented by 7 or 8 in further iterations, the depth decrement SXDEC was determined by static move properties, varying from 3 for the first check, to 7 for further tactical moves such as captures and attacking moves, up to 21, 24 or even 34 for non-tactical and apparently loosing moves. Those latter high decrements and reductions gave the Mark V the characteristic of a Shannon Type B program, which caused some tactical oversights with quiet moves involved, but made the program a strong mate solver for that time.

=See also=
 * Chess Champion Mark IV
 * Chess Champion Mark VI
 * Milton Bradley Phantom
 * SEX Algorithm

=Publications=
 * Editor (**1982**). //[|March 1982-News - Experts confounded as machine out-thinks Grandmaster Nunn]//. Your Computer, [|March 1982]
 * John F. White (**1982**). //[|Review-Chess Computers]//. Your Computer, [|March 1982]
 * Max Bramer (**1982**). //Chess - Chess Champion Mark V’s ability at solving chess problems//. [|Computer & Video Games], [|April 1982], [|pdf] hosted by Mike Watters
 * David Levy, David Broughton, Mark Taylor (**1989**). //The SEX Algorithm in Computer Chess//. ICCA Journal, Vol. 12, No. 1

=External Links=
 * [|Chess Champion Mark V (ICGA Tournaments)]
 * [|Chess Champion Mark V] from [|Chess Computer UK] by Mike Watters
 * [|Chess Computers - The UK Story] from [|Chess Computer UK] by Mike Watters
 * [|Scisys and Novag : The Early Years] from [|Chess Computer UK] by Mike Watters
 * [|SciSys Chess Champion Mark V] from [|Schachcomputer.info Wiki] (German, parts in English)

=References= =What links here?= include component="backlinks" page="Chess Champion Mark V" limit="80"
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