<prompt> Pedzisa mutsara unotevera: Ronald Câmara aiva nhengo yevatongi ve  <response>: 1972 na1986 Chess Olympiads, uye mutongi mukuru weWorld Junior Chess Championship muna 1978. Akanga ari Mutevedzeri weMutungamiri weBrazilian Chess Confederation 1970-1976 uye Mutungamiri weFIDE South American Zone 1974-1978. 