Feng-hsiung Hsu (Chinese: 許峰雄; pinyin: Xǔ Fēng Xióng; Cantonese: Heoi2 Fung1 Hung4) (nicknamed Crazy Bird) is a computer scientist and the author of the book Behind Deep Blue: Building the Computer that Defeated the World Chess Champion. His work led to the creation of the Deep Thought Chess Machine, which led to the first chess playing computer to defeat Grandmasters in tournament play and the first to achieve a certified Grandmaster level rating.
Hsu was the architect and the principal designer of the IBM Deep Blue chess machine. He was the recipient of the 1990 Mephisto Award for his doctoral dissertation and also the 1991 ACM Grace Murray Hopper Award for his contributions in architecture and algorithms for chess machines.
He was born in Keelung, Taiwan, and came to US after graduating from National Taiwan University with B.S. in E.E.. He started his graduate work at Carnegie Mellon University in the field of computer chess in the year 1985. In 1988 he was part of the "Deep Thought" team that won the Fredkin Intermediate Prize for Deep Thought's Grandmaster-level performance. In 1989 he joined IBM to design a chess-playing computer and received a Ph.D. with honors from Carnegie Mellon University.
In 1991, the Association for Computing Machinery awarded him a Grace Murray Hopper Award for his work on Deep Blue. In 1996, the supercomputer lost to world chess champion Garry Kasparov. After the loss, Hsu's team prepared for a re-match. During the re-match with Kasparov, the supercomputer had double the processing power it had during the previous match. On May 11, 1997, Kasparov lost the sixth and final game, and, with it, the match (2½-3½).
Prior to building the supercomputer Deep Blue that defeated Kasparov, Hsu worked on many other chess computers. He started with ChipTest, a simple chess-playing chip, based on a design from Unix-inventor's Ken Thompson's Belle, and very different from the other chess-playing computer being developed at Carnegie Mellon, HiTech, which was developed by Hans Berliner and included 64 different chess chips for the move generator instead of the one in Hsu's series. Hsu went on to build the successively better chess-playing computers Deep Thought, Deep Thought II, and Deep Blue Prototype.
Hsu now manages the platforms and devices center of Microsoft Research Asia, in Beijing. He has stated the view that brute-force computation has eclipsed humans in chess, and it could soon do the same in the ancient Asian game of Go.
- Behind Deep Blue: Building the Computer that Defeated the World Chess Champion. Princeton University Press, 2002. (ISBN 0-691-09065-3). Review by ChessBase.com
- Deep Blue versus Garry Kasparov
- Deep Blue - Kasparov, 1996, Game 1
- Deep Blue - Kasparov, 1997, Game 6
- Game Over: Kasparov and the Machine
- Computer History Museum. "Mastering the Game a History of Computer Chess." February 24, 2007. 
- Biographies Of The IBM Deep Blue Team, Press Material
- Behind deep blue: building the computer that defeated the world chess champion. Books.google.com.tw. Retrieved 2012-03-12.
- IBM. "IBM Research Scientist: Feng-Hsiung Hsu." 2007. February 26, 2007.
- Computer History Museum. "Defeating the World Chess Champion." February 24, 2007. 
- Shroder, Ed. "Historic Pictures." 2007. February 24, 2007
- ""Cracking Go: Brute-force computation has eclipsed humans in chess, and it could soon do the same in this ancient Asian game," by Feng-hsiung Hsu, ''IEEE Spectrum,'' October 2007". Spectrum.ieee.org. Retrieved 2012-03-12.
- Feng-hsiung Hsu at IBM
- Oral History of Feng-Hsiung Hsu. Interviewed by: Dag Spicer. Recorded: February 14, 2005 at Computer History Museum, Mountain View, California
- Feng-hsiung Hsu's papers at DBLP
- Chess, China, and Education: A Ubiquity Interview with F-H Hsu
- Open Letter from Feng-hsiung Hsu one of the main programmers of Deep Blue, and Open Letter from Owen Williams to Feng-hsiung Hsu on Deep Blue