Mezue ahịrịokwu na-esonụ: Geurt Gijssen bụ onye a maara nke ọma dị ka onye na-ekpe ikpe egwuregwu egwuregwu chess. Ọ bụ onye isi refirii nke ọtụtụ Chess Olympiads (1998, 2000, 2002,
2006), yana ọtụtụ egwuregwu na asọmpi maka aha World Chess Champion: