Development of the World Chess Championship 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 Anand. Because Anand's World Chess Champion title was won in a tournament rather than a match, a minority of commentators questioned the validity of his title. Kramnik also made ambiguous comments about the value of Anand's title, but did
Women's World Chess Championship 1981 The semifinal Ioseliani-Gaprindashvili ended 7-7; in the end, Ioseliani won the lucky draw and advanced to the final. Here she lost to Alexandria, who earned the right to challenge the reigning champion for the second time (after 1975). The championship match was played in Borjomi and Tbilisi in 1981. A tough match went the full 16 games and ended in an 8-8 tie, with champion Chiburdanidze thus retaining her title. Women's World Chess Championship 1981 The 1981 Women's World Chess Championship was won by Maia Chiburdanidze, who successfully defended her title against challenger Nana Alexandria after a closely fought match,