Kammala jumla mai zuwa: A wannan lokacin, Stean sau da yawa dole ne ya ajiye burinsa na wasa, kamar yadda ya shiga cikin tawagar Viktor Korchnoi na biyu don kamfen din zakarun duniya a 1977-78 da
Shekaru 1980 zuwa 1981. A fannoni da yawa, haɗin gwiwar da aka haɓaka sun yi nasara sosai; Korchnoi ya kawar da wasu Candidatesan takara masu ƙarfi kamar Boris Spassky, Robert Hübner da Lev Polugaevsky a kan hanyar zuwa wasan karshe biyu tare da Karpov. Matsayin Stean ya fi yawanci ya kasance tare da shirye-shiryen budewa kuma shi da Korchnoi sun zama abokai masu kyau.