World Chess Championship Topalov, and negotiations began for a Kramnik–Topalov match to unify the title. The FIDE World Chess Championship 2006 reunification match between Topalov and Kramnik was held in late 2006. After much controversy, it was won by Kramnik. Kramnik thus became the first unified and undisputed World Chess Champion since Kasparov split from FIDE to form the PCA in 1993. Kramnik played to defend his title at the World Chess Championship 2007 in Mexico. This was an 8-player double round robin tournament, the same format as was used for the FIDE World Chess Championship 2005. This tournament was won by Viswanathan
Women's World Chess Championship 1956 each played 8-game mini-matches against each other, with Rubtsova eventually clinching the title. Women's World Chess Championship 1956 The 1956 Women's World Chess Championship was won by Olga Rubtsova, who became the fourth women's champion. The Candidates Tournament was won by Rubtsova. Instead of her playing the defending champion Elisabeth Bykova, however, FIDE decided that the championship would be decided between the top three female players: Rubtsova, Bykova, and Lyudmila Rudenko, ex-champion and loser of the last title match. The Candidates Tournament was held in Moscow in October 1955. Rubtsova won narrowly, only half a point ahead of her closest