<prompt> Bhala okuqhubekayo kwalesi sigaba - URonald Câmara wayeyilungu leqembu lamajaji loMhlangano Wamazwe Omhlaba Wamazwe Omhlaba ka-1972 no-1986  <response>: Ama-Olympiad e-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. 