<prompt> Qedela umusho olandelayo: U-Evans wamelela i-U.S. kuma-Olympics ayisishiyagalombili e-Chess esikhathini esiyiminyaka engamashumi amabili nesithupha, wathola igolide 1950, isiliva  <response>: 1958, nezindondo zethusi 1976 ngomdlalo wakhe, kanye nokubamba iqhaza emidlalweni yegolide yeqembu 1976 nezindondo zesiliva 1966. 