World Chess Championship a Kasparov match, either with 2002 FIDE champion Ponomariov, or 2004 FIDE champion Kasimdzhanov. Partly due to his frustration at the situation, Kasparov retired from chess in 2005, still ranked No. 1 in the world. Soon after, FIDE dropped the short knockout format for a World Championship and announced the FIDE World Chess Championship 2005, a double round robin tournament to be held in San Luis, Argentina between eight of the leading players in the world. However Kramnik insisted that his title be decided in a match, and declined to participate. The tournament was convincingly won by the Bulgarian Veselin
World Chess Championship 2008, which Anand won. Then Topalov was seeded directly into the Candidates final of the World Chess Championship 2010. He won the Candidates (against Gata Kamsky). Anand again won the championship match. The next championship, the World Chess Championship 2012, had short knock-out matches for the Candidates Tournament. This format was not popular with everyone, and world #1 Magnus Carlsen withdrew in protest. Boris Gelfand won the Candidates. Anand won the championship match again, in tie breaking rapid games, for his fourth consecutive world championship win. Since 2013, the Candidates have been an 8 player double round robin tournament, with