Mezue ahịrịokwu na-esonụ: Isi ihe egwuregwu egwuregwu nke 1981 bụ egwuregwu ikpeazụ nke ndị Candidates Tournament (n'etiti Viktor Korchnoi na Robert Hübner) na
egwuregwu nke abụọ Karpov  Korchnoi World Chess Championship.