Tom Likens

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Home * People * Tom Likens

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. Tom Likens has been interested in bitboards ever since he read the Atkin and Slate paper on Chess 4.5 [2] (circa 1978). In 2005, Tom was a bit tired of bitboards and learned towards some type of 0x88 and Vector Attacks [3] inspired by CCC posts of Christophe Théron [4] [5], but finally stuck to bitboards.

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. David Slate, Larry Atkin (1977). Chess 4.5 - The Northwestern University Chess Program. Chess Skill in Man and Machine, reprinted (1988) in Computer Chess Compendium
  3. Open Sourcing your Engine by Tom Likens, Winboard Forum, October 05, 2005
  4. Re: Question:1.hashtable 2.board 3.C by Christophe Théron, CCC, June 13, 2000
  5. 0x88 is not so smart by Christophe Théron, CCC, June 13, 2000
  6. Robert Hyatt (1999). Rotated Bitmaps, a New Twist on an Old Idea. ICCA Journal, Vol. 22, No. 4

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