<prompt> Qedela umusho olandelayo:  <response>: I-Olympiad Chess yaseThessaloniki 1984 neDubai 1986, ukusebenza kwakhe kwaqinisekiswa, wathola amaphuzu acishe abe ngu-67 kuzo zombili izikhathi futhi waba negalelo emidlalweni emibili yegolide yeqembu. 