<prompt> Bhala okuqhubekayo kwalesi sigaba - U-Evans wamelela i-U.S. kuma-Olympiads e-Chess ayisishiyagalombili esikhathini esiyiminyaka engamashumi amabili nesithupha, ewina izindondo zegolide 1950, isiliva 1958, nezethusi 1976 ngomdlalo wakhe, futhi wabamba iqhaza eqenjini legolide 1976 nesiliva 1966  <response>: izindondo. 