<prompt> Bhala okuqhubekayo kwalesi sigaba - U-Evans wamelela i-U.S. Emidlalweni engu-8 yama-Olympiad Chess esikhathini esiyiminyaka engamashumi amabili nesithupha, wathola igolide ngo-1950, isiliva ngo-1958 nethusi ngo-1976  <response>: izindondo zomdlalo wakhe, kanye nokubamba iqhaza emidlalweni yeqembu legolide 1976 nesiliva 1966. 