<prompt> Qedela umusho olandelayo: URonald Câmara wayeyilungu leqembu lamajaji e-  <response>: Ama-Olympiad e-1972 no-1986 Chess, kanye nomphathi omkhulu we-World Junior Chess Championship ngo-1978. WayenguSekela likaMongameli weBrazil Chess Confederation 1970-1976 kanye noMongameli weFIDE South American Zone 1974-1978. 