Kramnik, in a better position in the early middlegame, sacrificed a piece to launch an attack—a strategy known to be highly risky against computers, which are at their strongest when defending such attacks.
True to form, Fritz found a watertight defense and Kramnik was left in a bad position.
However, post-game analysis has shown that Fritz was unlikely to have been able to force a win—Kramnik gave up a drawn position.
[2] Fritz had been chosen to play Kramnik by winning a qualifying event in Cadaques, Spain in 2001.
Another difference was that in games lasting more than 56 moves, Kramnik was allowed to adjourn until the following day, during which time he could use his copy of Fritz to aid him in his overnight analysis of the position.