Kammala wannan jumla: An ba shi lambar Arbiter ta Duniya, ya kasance Babban Alkali a cikin
23rd Chess Olympiad, kuma a cikin 8th Chess Olympiad na Mata, duka a Buenos Aires 1978. Ya kuma kasance babban alkalin wasa a gasar cin kofin duniya ta Chess tsakanin Anatoly Karpov da Viktor Korchnoi a Merano 1981.