Mezue ahịrịokwu na-esonụ: Kasparov Gambit 8...d5 na-egwuri egwu ugboro abụọ na
World Chess Championship 1985, mana ọ fọrọ nke nta ka ọ pụọ na nna ukwu praxis mgbe egwuregwu Karpov<unk>Van der Wiel, Brussels (SWIFT) 1986.