TYUMEN, December 8 (RIA Novosti) - Two Russian grandmasters have reached the quarterfinals of the World Chess Cup in the Siberian city of Khanty-Mansiisk.

Alexander Grishchuk's 1,5:0,5 victory over Gata Kamsky from the United States and Sergei Rublyovsky's 1,5:0:5 victory over compatriot Konstantin Sakayev saw them through to the last eight of the $1.6-million World Chess Federation (FIDE) tournament.

Ruslan Ponomaryov, from Ukraine, also reached the quarterfinals after a 2:0 win over Loek Wan Wely from the Netherlands on Wednesday.