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 1986 point, earning the right to challenge the reigning champion for the title. The championship match was played in Sofia in 1986. Once again, defending champion Chiburdanidze had no real problems. She beat challenger Akhmilovskaya with a comfortable margin of three points and retained her title. Women's World Chess Championship 1986 The 1986 Women's World Chess Championship was won by Maia Chiburdanidze, who successfully defended her title against challenger Elena Akhmilovskaya. As part of the qualification process, two Interzonal tournaments were held in June 1985, one in Havana and the other in Zeleznovodsk, featuring the best players from each FIDE zone.