Nyora kupfuurira kweiyi ndima - MuWorld Chess Championship cycles, Portisch akatamba muInterzonal yega yega kubva muna 1962 kusvika muna 1993, gumi nemaviri akazara. Akakwanisa kupinda muchikamu chinotevera, Mutambo weVanoda Kukwikwidza, kasere: muna 1966, 1969, 1975, 1978, 1981, 1984
, 1987 na1990; nemigumisiro yake yakanakisisa paakasvika kumakwikwi ekupedzisira mu1977 na1980.