Tom+Likens

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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. 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 has been interested in bitboards ever since he read the Atkin and Slate paper on Chess 4.5 (circa 1978). He has always had a hardware bent and the elegance of the idea was immediately apparent to him. In 2005, Tom was a bit tired of bitboards and learned towards some type of 0x88 and Vector Attacks inspired by CCC posts of Christophe Théron, but finally stuck to bitboards.
 * Tom Likens**,

=Forum Posts=

2000 ...

 * [|Nice Rotated-bitmaps Article by Hyatt in ICCA] by Tom Likens, CCC, February 07, 2000 » Rotated Bitboards
 * [|Interesting EGTB bug] by Tom Likens, CCC, April 16, 2002 » Endgame Tablebases
 * [|How to handle EGTB stalemates] by Tom Likens, CCC, March 02, 2003 » Stalemate
 * [|Hamming distance and lower hash table indexing] by Tom Likens, CCC, September 02, 2003
 * [|Evaluation-based Reductions and/or Extensions] by Tom Likens, CCC, December 28, 2003 » Extensions, Reductions
 * [|Implementing Planning in an Engine] by Tom Likens, CCC, February 04, 2004 » Planning
 * [|Time to implement Learning] by Tom Likens, CCC, February 26, 2004 » Learning
 * [|Evaluating Pinned Pieces] by Tom Likens, CCC, May 19, 2004 » Pin

2005 ...

 * [|Open Sourcing your Engine] by Tom Likens, Winboard Forum, October 05, 2005
 * [|Move ordering at different (Knuth) node types] by Tom Likens, Winboard Forum, February 21, 2006 » Move Ordering, Node Types
 * [|Compact Bitboard Attacks] by Tom Likens, Winboard Forum, March 14, 2006 » Kindergarten Bitboards
 * [|New version of Djinn 0.920 (Windows 32 & Linux 32/64)] by Tom Likens, Winboard Forum, March 21, 2006

2010 ...

 * [|Djinn 0.969 Released (64-bit + 32-bit)] by Tom Likens, CCC, October 20, 2012
 * [|How Do You Automatically Tune Your Evaluation Tables] by Tom Likens, CCC, January 07, 2014 » Automated Tuning

2015 ...

 * [|Re: AMD's Ryzen launches March 2, outperforming Intel's Core] by Tom Likens, CCC, February 28, 2017 » AMD

=External Links=
 * [|Djinn]
 * [|Computer chess techniques]
 * [|Booklist]

=References= =What links here?= include page="Tom Likens" component="backlinks" limit="60"
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