Veselin Topalov

About Veselin Topalov

Veselin Aleksandrov Topalov (Bulgarian: Весели́н Алексáндров Топа́лов, pronounced [vɛsɛˈlin toˈpalof]; born 15 March 1975) is a Bulgarian chess grandmaster and former FIDE World Chess Champion. Topalov became FIDE World Chess Champion by winning the FIDE World Chess Championship 2005. He lost his title in the World Chess Championship 2006 against Vladimir Kramnik. He challenged Viswanathan Anand at the World Chess Championship 2010, losing 6½–5½. He won the 2005 Chess Oscar. He was ranked world number one from April 2006 to January 2007. He regained the top ranking in October 2008 until January 2010.

Bio summary from Wikipedia.