Deep Blue versus Garry Kasparov was a pair of six-game chess matches between then-world chess champion Garry Kasparov and an IBM supercomputer called Deep Blue. Kasparov won the first match, held in Philadelphia in 1996, by 4–2. Deep Blue won a 1997 rematch held in New York City by 31⁄2–21⁄2. The second match was the first defeat of a reigning world chess champion by a computer under tournament conditions, and was the subject of a documentary film, Game Over: Kasparov and the Machine.
The 1997 match was widely covered by the media, and Deep Blue became a celebrity. After the match, it was reported that IBM had dismantled Deep Blue, but in fact it remained in operation for several years.
Deep Blue's win was seen as symbolically significant, a sign that artificial intelligence was catching up to human intelligence, and could defeat one of humanity's great intellectual champions. Later analysis tended to play down Kasparov's loss as a result of uncharacteristically bad play on Kasparov's part, and play down the intellectual value of chess as a game that can be defeated by brute force.
In December 2016, discussing the match in a podcast with Sam Harris, Kasparov advised of a change of heart in his views of this match. Kasparov stated: "While writing the book I did a lot of research – analysing the games with modern computers, also soul-searching – and I changed my conclusions. I am not writing any love letters to IBM, but my respect for the Deep Blue team went up, and my opinion of my own play, and Deep Blue's play, went down. Today you can buy a chess engine for your laptop that will beat Deep Blue quite easily."
After Deep Blue's victory, the ancient Chinese game of Go, a game of simple rules and far more possible moves than chess, became the canonical example of a game where humans outmatched machines. Go requires more intuition and is far less susceptible to brute force. It is widely played in China, South Korea, and Japan, and was considered one of the four arts of the Chinese scholar in antiquity.