<prompt> Pedzisa mutsara unotevera: Evans akamiririra U.S. mumitambo misere yeChess Olympiad pamusoro pemakore makumi maviri nematanhatu, achikunda ndarama 1950, sirivha 1958, uye bronze  <response>: 1976 menduru dzekutamba kwake, uye kutora chikamu muchikwata goridhe 1976 uye sirivheri 1966 menduru. 