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 Yifan was knocked-out in the second round in Women's World Chess Championship 2012, which was played in Khanty Mansiysk. Anna Ushenina, seeded 30th in the tournament, won the final against Antoaneta Stefanova 3–2. The Women's World Chess Championship 2013 was a match over 10 games between defending champion Anna Ushenina and Hou Yifan who had won 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. After Hou declined to defend her title at the Women's World Chess Championship 2015, the title was won by Mariya Muzychuk,