Mezue ahịrịokwu na-esonụ: Ọtụtụ obere eserese mere na
World Chess Championship 1984 n'etiti Anatoly Karpov na Garry Kasparov. Nke a mere n'egwuregwu nke iri abụọ na itoolu mgbe e mechara nzọụkwụ iri na atọ. Kasparov na-akọwa Draw kwenyere na atụmatụ Black: site na nsonaazụ zuru oke, ihe ndị na-alụ ọgụ na-agwụ agwụ. Ndị ọcha jirila nkeji iri itoolu na itoolu, ndị ojii ejirila nkeji iri ise na otu.