Parker Chess

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Parker Chess for Atari and PC [1]

Parker Chess, (Chess)
a commercially available chess program developed by Philidor Software aka Intelligent Software, manufactured by Parker Brothers in 1983 [2]. The program evolved from Philidor Software's development chess program dubbed Philidor and already applied an early version of the SEX Algorithm, the SX Algorithm, using fractional ply increments, extensions and reductions [3].


The IBM PC version of Parker Chess was written in 8086 assembly and was the work of David Broughton [4] [5].

Atari 8-bit

In 1983, Parker Brothers further purchased Chess as cartridge system for Atari 8-bit home computers [6], written in 6502 assembly, likely with Intelligent's 6502 expert Mark Taylor involved.

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Parker Chess

Parker Brothers


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