Veselin Aleksandrov Topalov 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. His peak rating was 2816 in July 2015, placing him equal-eighth on the highest FIDE-rated players.
Topalov has competed at nine Chess Olympiads (1994-2000, 2008-2016), winning board one gold in 2014 and scoring best overall performance in 1994. He also won in Linares, Corus, Dortmund, Stavanger and Pearl Spring tournaments.