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 1991 Women's World Chess Championship 1991 The 1991 Women's World Chess Championship was won by Xie Jun, who defeated the incumbent champion Maia Chiburdanidze in the title match. As part of the qualification process, two Interzonal tournaments were held in the summer of 1990, one in Azov in June and the other in the Genting Highlands in Malaysia in June and July, featuring the best players from each FIDE zone. A total of 36 players took part, with the top three from each Interzonal qualifying for the Candidates Tournament. Kachiani and Galliamova shared first place in Azov, half a point ahead