World Chess Championship the organisation of the so-called "Prague Agreement" to reunite the world championship. Kramnik had organised a candidates tournament (won later in 2002 by Peter Leko) to choose his challenger. It was decided that Kasparov play the FIDE champion (Ponomariov) for the FIDE title, and the winner of this match play the winner of the Kramnik–Leko match for a unified title. However, the matches proved difficult to finance and organise. The Kramnik–Leko match, now renamed the "Classical World Chess Championship", did not take place until late 2004 (it was drawn, so Kramnik retained his title). Meanwhile, FIDE never managed to organise
World Chess Championship Anand, thus making him the World Chess Champion. 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 not claim the title himself. Subsequent world championship matches returned to the format of a match between the champion and a challenger. The following two championships had special clauses arising from the 2006 unification. Kramnik was given the right to challenge for the title he lost in a tournament in the World Chess Championship