<prompt> Kalima dǝga tǝmzǝyin: Ronald Câmara dǝ shima membaa majalis kuruma lardǝwa Europebe wo.  <response>: 1972 kuru 1986 Chess Olympiads, kuru shiye kura arbitre World Junior Chess Championshipbe suro saa 1978 lan. Shiye Vice President Brazilian Chess Confederationbe 1970-1976 kuru President FIDE South American Zonebe 1974-1978 ro wallono. 