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 2013 Women's World Chess Championship 2013 The Women's World Chess Championship 2013 was a chess match for the championship. The match was scheduled over ten games from 10 to 27 September 2013 in Taizhou, Jiangsu, China. The match was played between defending champion Anna Ushenina, winner of the Women's World Chess Championship 2012, and challenger Hou Yifan, the previous champion and winner of the FIDE Women's Grand Prix 2011–2012. After seven of ten games Hou Yifan won the match 5.5 to 1.5 to retake the title. Prior to the match, as of 23 May 2013, Anna Ushenina and Hou Yifan have