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 1972 Women's World Chess Championship 1972 The 1972 Women's World Chess Championship was won by Nona Gaprindashvili, who successfully defended her title against challenger Alla Kushnir. This was the third (and last) consecutive title match between the two strongest female players of their time. For the first time, the women's championship cycle consisted of all the same stages as the open cycle. An Interzonal tournament was held in Ohrid in May 1971, featuring the best players from each FIDE zone, for a total of 18 participants. The top three would qualify for the Candidates Tournament. The top three from the Interzonal