Kasparov rose quickly with the FIDE entire world rankings. Resulting from an oversight by the USSR Chess Federation, which believed that a grandmaster tournament in Banja Luka, Yugoslavia, was for juniors, he participated in that function in 1979 although still unrated. He was a replacement for your Soviet defector https://financefeeds.com/understanding-the-usd-mxn-exchange-rate-major-determinants-and-consequence/