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In 1965, [[John McCarthy]], by then at [[Stanford University]], visited the [https://en.wikipedia.org/wiki/Soviet_Union Soviet Union]. A group using the [[M-220]] <ref>[http://www.computer-museum.ru/english/m2.htm The Fast Universal Digital Computer M-2] from the [[Russian Virtual Computer Museum]]</ref> computer at [[Alexander Kronrod|Alexander Kronrod’s]] laboratory at the Moscow [[Institute of Theoretical and Experimental Physics]] ('''ITEP''') challenged him to a match. Kronrod considered the [[Kotok-McCarthy-Program]] to be the best program in the United States at the time <ref>[[Mathematician#Landis|Evgenii Landis]], [[Mathematician#Yaglom|Isaak Yaglom]] ('''1987'''). ''Remembering A.S. Kronrod''. ('''2002'''). Translation by [http://www.translatorscafe.com/cafe/member16949.htm Viola Brudno], Edited by [[Mathematician#WaGautschi|Walter Gautschi]], [https://www.cs.purdue.edu/homes/wxg/Kronrod.ps ps]</ref>.