Deep Thought (chess computer) Kasparov in 1989 as well as in a correspondence match with Michael Valvo. It was named after Deep Thought, a fictional computer in Douglas Adams' series, "The Hitchhiker's Guide to the Galaxy". The naming of chess computers has continued in this vein with Deep Blue, Deep Fritz, Deep Junior, etc. Deep Thought won the North American Computer Chess Championship in 1988 and the World Computer Chess Championship in the year 1989, and its rating, according to the USCF was 2551. In 1994, Deep Thought 2 won the North American Computer Chess Championship for the fifth time, with its rating estimated
Human–computer chess matches points. Humans won 148 ½ points. Yona Kosashvili scored highest for the humans at 6 points out of 6 games. Kallisto scored highest for the computers at 4 ½ points. In 1988, Deep Thought shared first place with Tony Miles in the Software Toolworks Championship, ahead of a former world champion Mikhail Tal and several grandmasters, including Samuel Reshevsky, Walter Browne, and Mikhail Gurevich. It also defeated grandmaster Bent Larsen, making it the first computer to beat a grandmaster in a tournament. Its rating for performance in this tournament of 2745 (USCF scale). In 1989, Levy was defeated by the