<prompt> Nyorai kupfuurira kweiyi ndima - Ronald Câmara akanga ari mutezo weboka revatongi ve 1972 uye 1986  <response>: 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. 