<prompt> Qedela umusho olandelayo: Edgar Walther 24 Disemba 1930 23 Okthoba 2013, wayengumpetha we-FIDE waseSwitzerland FM, uMphathi We-Chess Wokuxhumana Komhlaba Wonke ICM, 1978, kanye nompetha wezindondo zomuntu ngamunye we-Olympiad Chess  <response>: Ngo-1954 futhi ngo-1985. 