"Ten years ago today, IBM’s Deep Blue (NYSE: IBM) became the first computer to win a chess tournament against a reigning world champion chess master.
Deep Blue had 32 processors and could process about 200 million chess moves per second in its historic six-game match against Garry Kasparov."
References:
http://www.research.ibm.com/deepblue/
http://en.wikipedia.org/wiki/IBM_Deep_Blue
http://www.sys-con.com/read/374500.htm
http://www.wired.com/science/discoveries/news/2007/05/murraycampbell_qa