 Nyora kupfuurira kweiyi ndima - MuWorld Chess Championship cycles, Portisch akatamba muInterzonal yega yega kubva muna 1962 kusvika muna 1993, gumi nemaviri akazara. Akakwanirisa nokuda kwechikamu chinotevera, Mutambo weVadzidzi, kasere: muna 1966, 1969, 1975, 1978, 1981, 1984, 1987 uye 1990; nemigumisiro yake yakanakisisa paakasvika kuCandidates semi-finals muna 1977 na1980. 