Kasparov rose speedily through the FIDE world rankings. On account of an oversight via the USSR Chess Federation, which thought that a grandmaster Event in Banja Luka, Yugoslavia, was for juniors, he participated in that party in 1979 although still unrated. He was a substitution with the Soviet defector https://financefeeds.com/ftx-co-founders-to-be-sentenced-after-testifying-against-sam-bankman-fried/