Pedzisa mutsara unotevera: Mumakwikwi eWorld Chess Championship, Portisch akatamba mumakwikwi ose eInterzonal 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 uye 1990; nemigumisiro yake yakanakisisa paakasvika kumakwikwi ekupedzisira mu1977 na1980.