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a chess program by primary developer [[Chrilly Donninger]], subsequently supported by members of the [[First Vienna Computer Chess Club]] (Nimzo Werkstatt) concerning [[Engine Testing|testing]], [[Knowledge|chess knowledge]], [[Opening Book|opening book]] and hardware. The program was first dubbed ''Nimzo-Guernica'' in remembrance to [https://en.wikipedia.org/wiki/Aron_Nimzowitsch Aron Nimzowitsch] and as manifest of Chrilly's [https://en.wikipedia.org/wiki/Anti-war Anti-war] engagement <ref>[https://en.wikipedia.org/wiki/Bombing_of_Guernica Bombing of Guernica from Wikiepedia]</ref>. It had its tournament debut at the [[3rd Computer Olympiad#Chess|3rd Computer Olympiad 1991]] and further played the [[DOCCC 1991]] and [[IPCCC 1991]]. At the [[WMCCC 1993]], Nimzo-Guernica aka Nimzo-2 upset [[Gideon|Mephisto Gideon]] <ref>With the help of a sign bug in [[Passed Pawn|passed pawn]] evaluation, see [[Chrilly Donninger]] ('''1999'''). ''Computer machen keine Fehler''. [[Computerschach und Spiele|CSS]] 2/99, [http://www.mustrum.de/chrilly/keine_fehler.pdf pdf] (German)</ref> and later winner [[HiarcsHIARCS]] to lead the pack after five rounds, and finished strong fourth despite 1.5 points out of the last four rounds.