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 1934 Women's World Chess Championship 1934 The Women's World Chess Championship 1934 was held in Rotterdam in the Netherlands. In 1934, reigning Women's World Chess Champion Vera Menchik was challenged by Sonja Graf, another female player who, like Menchik, regularly competed with men in open tournaments. The match was played in Rotterdam over four games. Menchik was a huge favourite beforehand, but Graf caused a small sensation by winning the first game. Menchik then won the other three, however, to successfully defend her title. This was the first time the women's title was put on the line in a match arranged