Vassily Ivanchuk of Ukraine turned back the clock to defeat 13th seed Anish Giri of the Netherlands in the first game of the quarterfinals of the Chess World Cup at Tbilisi, Georgia, on Tuesday. Second seed Wesley So of the United States was held to a draw by Georgia's Baadur Jobava.

Results (quarterfinals, first game): Wang Hao (Chn) drew with Ding Liren (Chn); Maxime Vachier-Lagrave (Fra) drew with Alexander Grischuk (Rus); Vassily Ivanchuk (Ukr) beat Anish Giri (Ned); So Wesley (US) drew with Baadur Jobava (Geo); Maxim Rodshtein (Isr) lost to Vladimir Fedoseev (Rus); Peter Svidler (Rus) drew with Bu Xiangzhi (Chn); Daniil Dubov (Rus) drew with Levon Aronian (Arm).