(Game and Report courtesy Chessbase.com)
It was one of the shortest, most decisive opening games in World Championship history. Veselin Topalov rattled off his moves quickly and comfortably, with Anand following suit, until he apparently ran into his challenger's home preparation (or muddled up his own). On move 23 he blundered in a very dangerous position, and Topalov drove his advantage forcefully home.
[D86] Gruenfeld, exchange, classical variation