World's youngest ever Grandmaster Ukraine's Sergey Karjakin advanced to the quarterfinals after an impressive victory over Russian Nikita Vitiugov in the second pre-quarterfinal game of the World Chess Cup in Russia.The 19-year-old Ukrainian prodigy, who became a Grandmaster at the age of 12, played a fine positional game with black pieces to outclass Vitiugov. The round of 16 has so far produced just three decisive games. Five out of eight matches got in to the tie-break games that will first feature a set of four rapid games and then, if necessary, five sets of two games of blitz tiebreak.