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Tom Likens,
an American electrical engineer and as AMD employee part of the design team implementing the Zen microarchitecture with the Ryzen series of x86-64 CPUs, first released in March 2017 [1]. As computer chess programmer, Tom Likens is author of the Chess Engine Communication Protocol compatible chess engine Djinn, which was his third attempt to write a chess program [2]. Tom has been interested in bitboards ever since he read the Atkin and Slate paper on Chess 4.5 [3] (circa 1978). He has always had a hardware bent and the elegance of the idea was immediately apparent to him [4]. In 2005, Tom was a bit tired of bitboards and learned towards some type of 0x88 and Vector Attacks [5] inspired by CCC posts of Christophe Théron [6] [7], but finally stuck to bitboards [8].

Forum Posts

2000 ...

2005 ...

2010 ...

2015 ...

External Links


  1. ^ Re: AMD's Ryzen launches March 2, outperforming Intel's Core by Tom Likens, CCC, February 28, 2017
  2. ^ Djinn by Tom Likens
  3. ^ David Slate and Larry Atkin (1977). CHESS 4.5 - The Northwestern University Chess Program. Chess Skill in Man and Machine (ed. P.W. Frey), pp. 82-118. Springer-Verlag, New York, N.Y. 2nd ed. 1983. ISBN 0-387-90815-3. Reprinted (1988) in Computer Chess Compendium
  4. ^ Technical Overview
  5. ^ Open Sourcing your Engine by Tom Likens, Winboard Forum, October 05, 2005
  6. ^ Re: Question:1.hashtable 2.board 3.C by Christophe Théron, CCC, June 13, 2000
  7. ^ 0x88 is not so smart by Christophe Théron, CCC, June 13, 2000
  8. ^ Computer chess techniques
  9. ^ Robert Hyatt (1999). Rotated Bitmaps, a New Twist on an Old Idea. ICCA Journal, Vol. 22, No. 4

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