Garry Kasparov is a Russian chess grandmaster, former world chess champion, and one of the greatest chess players in history. Born on April 13, 1963, he became the youngest ever undisputed world champion in 1985 at the age of 22. Kasparov is known for his deep understanding of the game and his aggressive playing style. After retiring from professional chess in 2005, Kasparov became an author and political activist. He has written several books on chess and politics, including How Life Imitates Chess. Kasparov is also known for his matches against the computer program Deep Blue, which he famously faced in the 1990s.