Whakaotihia te rerenga e whai ake nei: Ko Portisch te tuarua o Karpov i tana whakamutunga
te whakataetae toa o te ao ki a Kasparov i te tau 1990. I Hungary, i kii a Bobby Fischer ki a Portisch ko nga keemu katoa i waenga i a Karpov raua ko Kasparov i whakatikatikahia, no reira i patai a Portisch, i taua keehi, "He aha taku i mahi ai i reira?"