Pedzisa mutsara unotevera: Karpov akaedza 9...Nd7 kakawanda mu
1990 World Championship match, asi Kasparov akawana mukana wakakura pamusoro payo mumutambo wechi18. Yakasimba asi isina simba. Zvinovhiringidza 9...Nd7 inonziwo Chigorin Variation saka pane misiyano miviri yeRuy Lopez ine zita iroro, asi 9...Na5 ndiyo kufamba kunowanzobatanidzwa neChigorin. Uku kudzivirira kunozivikanwawo seKeres Variation, mushure mePaul Keres.