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 the winner playing a match against the champion for the title. These have followed a 2-year cycle: qualification for the Candidates in the odd year, the Candidates tournament early in the even year, and World Championship match late in the even year. Magnus Carlsen defeated Anand in the World Chess Championship 2013. Carlsen has successfully defended his title thrice, against Anand in the World Chess Championship 2014, against Sergey Karjakin in the World Chess Championship 2016, and against Fabiano Caruana in the World Chess Championship 2018. His last two defences were decided by tie-break in rapid games. Before 1948 world