<prompt> Qedela umusho olandelayo: U-Evans wamelela i-U.S. ku-Olympia ye-Chess eyisishiyagalombili esikhathini esiyiminyaka engamashumi amabili nesithupha, wathola igolide 1950, isiliva 1958, nethusi  <response>: Ngo-1976 wathola izindondo zomdlalo wakhe, futhi wabamba iqhaza emidlalweni yeqembu legolide 1976 nesiliva 1966. 