Changes

</ref> and subsequent versions in [[8086]] [[Assembly|assembly]] to either run on an [https://en.wikipedia.org/wiki/Osborne_1 Osborne] and later on an [[IBM PC]] <ref>[http://www.computerhistory.org/chess/full_record.php?iid=doc-431614f6c8af8 The Fourth World Computer Chess Championship] (labeled 22nd ACM), [http://archive.computerhistory.org/projects/chess/related_materials/text/3-1%20and%203-2%20and%203-3%20and%204-3.1983_WCCC/1983-%20WCCC.062303061.sm.pdf pdf] from [[The Computer History Museum]], [http://www.sci.brooklyn.cuny.edu/%7Ekopec/Publications/Publications/O_36_C.pdf pdf] from [[Danny Kopec]]</ref>, in 1983 commercialized as [[Parker Chess]]. Taylor was responsible to port it to [[6502]] assembly for the SciSys [[Chess Champion Mark V]] branch. Parker Chess and Mark V already applied the first version of [[Depth#FractionalPlies|fractional ply deepening ]] with [[Extensions|extensions]] and [[Reductions|reductions]], aka [[SEX Algorithm|SX Algorithm]], which was somehow an early implementation of what was later called [[Late Move Reductions]] <ref>[[David Levy]], [[David Broughton]], and [[Mark Taylor]] ('''1989'''). ''The [[SEX Algorithm]] in Computer Chess''. [[ICGA Journal#12_1|ICCA Journal, Vol. 12, No. 1]]</ref>. Philidor played the [[ACM 1981]] and [[ACM 1982]], the [[European MCC 1981]] and [[European MCC 1982]], and the [[WMCCC 1981]] in [https://en.wikipedia.org/wiki/Travem%C3%BCnde Travemünde] and the [[WCCC 1983]] in [https://en.wikipedia.org/wiki/New_York_City New York] <ref>[https://www.game-ai-forum.org/icga-tournaments/program.php?id=417 Philidor's ICGA Tournaments]</ref>.