text: Kramnik refused to play the fifth game unless the original conditions agreed for the match were adhered to. As a result, the point was awarded to Topalov, reducing Kramnik's lead to 3–2. Kramnik stated that the appeals committee was biased and demanded that it be replaced. As a condition to continue the match, Kramnik insisted on playing the remaining games under the original conditions of the match contract, which allows use of the bathroom at the players' discretion.
  The controversy resulted in a heavy volume of correspondence to Chessbase and other publications. The balance of views from fans was in support of Kramnik. Prominent figures in the chess world, such as John Nunn, Yasser Seirawan, and Bessel Kok also sided with Kramnik.
  The Russian and Bulgarian Chess Federations supported their respective players.
  After twelve regular games the match was tied 6–6, although Kramnik continued to dispute the result of the unplayed fifth game until the end of the match. On 13 October 2006 the result of this disputed game became irrelevant as Kramnik won the rapid tie-break by a score of 2½–1½.
  Kramnik's victory helped him win the Chess Oscar for 2006, the second of his career.
  2007 World Championship tournament in Mexico
  When Kramnik won the 2006 unification match, he also won Topalov's berth in the 2007 World Championship as the incumbent FIDE champion. Although the rationale behind his (and Garry Kasparov's) "classical" title is that the title should change hands by challenge match rather than by tournament, Kramnik stated that he would recognize the winner of this tournament as being the world champion.