<prompt> Qedela umusho olandelayo: U-Evans wamelela i-U.S. kuma-Olympics ayisishiyagalombili e-Chess esikhathini esiyiminyaka engamashumi amabili nesithupha, wathola indondo yegolide 1950, isiliva 1958, nethusi 1976 ngomdlalo wakhe, futhi wabamba iqhaza eqenjini legolide 1976 nesiliva  <response>: 1966 izindondo. 