Dee ihe na-esote paragraf a - E nyere Schmid utu aha International Arbiter n'afọ 1975. Ọ bụ onye ọka ikpe nke Fischer<unk>Spassky 1972, Karpov<unk>Korchnoi 1978, Kasparov<unk>Karpov 1986
Egwuregwu World Championship, na maka Fischer-Spassky 1992 'Revenge Match'.