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the [[Northwestern University]] chess program by [[David Slate]], one of the original authors of [[Chess (Program)|Chess x.x]], and [[William Blanchard]] of Vogelback computing center at Northwestern University. Nuchess played the [[WCCC 1980]] in [https://en.wikipedia.org/wiki/Linz Linz] on a [[CDC Cyber|CDC Cyber 176]] and the [[WCCC 1983]] in [https://en.wikipedia.org/wiki/New_York_City New York] on a [[Cray-1]] 4Mb, becoming sixth and fourth respectively. Nuchess further participiated at the [[ACM 1981]] (runner up), the [[ACM 1982]], where [[Belle]] won on tie-break points before [[Cray Blitz]], Nuchess and [[CHAOS]], all 3/4, and the [[ACM 1984]]. Nuchess was a 64 bit program, written in [[Fortran]], program size in 1983 was about 250K and it searched about 2.8K [[Nodes per Second|Nodes per second]] <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> . Nuchess, apparently the successor of Chess 4.9, was mentioned as Chess 5.0 at the [https://en.wikipedia.org/wiki/Ars_Electronica Ars Electronica] site of the [[WCCC 1980]] <ref>[http://90.146.8.18/de/archives/festival_archive/festival_catalogs/festival_artikel.asp?iProjectID=9497 Ars Electronica - Die Teilnehmer an der 3. Computerschach-Weltmeisterschaft] (German)</ref> , where Chess 4.9 did also compete with [[Larry Atkin]] and [[David Cahlander]] as authors.