Vladimir Kramnik, born 25 June 1975, is a Russian chess grandmaster. He was Classical World Chess Champion from 2000 to 2006, and undisputed World Chess Champion from 2006 to 2007.
In October 2000, he defeated Garry Kasparov in a match played in London, and became the Classical World Chess Champion. Part of his victory was insured by Kasparov's failure to refute Kramnik's adoption of the Berlin Defense in 4 games.
So, maybe my failure to defeat the Berlin Defense in this game should not be judged too harshly!