Boris Gelfand is an Israeli Grandmaster born 1968. He won the Supertournaments of Biel and Wijk an Zee twice (1992,1994).
He recently won the 2011 Canidate Tournament and will play Viswanathan Anand in the 2012 World Championship.
Kiril Georgiev is a Bulgarian Grandmaster born in 1965. He won 3 Bulgarian Chess Championship and is considered the strongest Bulgarian player at the moment. He holds the record for most simultan games played with 360 games in 2009. He scored 280 wins, 6 loses and 74 draws.
Gelfand plays a great knight sacrifice that leads to a crushing attack.