Zach Wegner

Home * People * Zach Wegner



Zach Wegner, an American software engineer and computer chess programmer based in Austin, TX. He has been involved in CC since starting his first program in 2002, at the age of 14. He is the author of ZCT, an open source engine written in C, and author of Rondo, the continuation of Anthony Cozzie's Zappa. Zach has been an organizer here at CPW when he was active in computerchess until 2011!

=Rybka Case= Zach Wegner was skeptic by Vasik Rajlich's statements on the origins of Rybka 1.0 beta and its influence from Fruit, to investigate and compare disassembled Rybka with Fruit. He published some results on evaluation in 2010.

=Rondo= In 2010, Zach collaborated with Anthony Cozzie, who, still in computer chess retirement, has given control for further development of his massive parallel program Zappa to Zach. The new project Rondo was registered for the WCCC 2010. Rondo became strong runner up in both the open hardware WCCC 2010 behind Rybka, and the uniform hardware WCSC 2010 close behind Shredder. Rondo was declared joint champion along with Thinker after the disqualification of Rybka by the ICGA in June 2011.

=Forum Posts=

2002 ...

 * BitBoard q by Zach Wegner, CCC, August 18, 2002 » Bitboards

2004 ...

 * Re: Attack table by Zach Wegner, Winboard Forum, October 22, 2004 » Attack and Defend Maps, Node Types
 * Re: Smallest chess program in chess is in basic by Zach Wegner, CCC, March 19, 2005

2006 ...

 * Zach's tricky 32-bit approach by Zach Wegner, Winboard Forum, August 22, 2006 » Kindergarten Bitboards
 * Yet another new bitboard move generation method by Zach Wegner, Winboard Forum, September 22, 2006 » Titboards

2008 ...

 * If making an SMP engine, do NOT use processes by Zach Wegner, CCC, February 07, 2008 » Parallel Search
 * Semi-Path Dependent Hashing: a semi-useless idea by Zach Wegner, CCC, May 24, 2008 » Repetitions
 * Old CCC archives? by Zach Wegner, CCC, July 24, 2008
 * Rybka 1.0 vs. Strelka by Zach Wegner, CCC, August 19, 2008 » Rybka, Strelka
 * Questions for Vas by Zach Wegner, CCC, August 25, 2008 » Vasik Rajlich
 * Re: Zobrist key random numbers by Zach Wegner, CCC, January 22, 2009 » Zobrist Hashing
 * ZCT 0.3.2500 released by Zach Wegner, CCC, June 02, 2009
 * Bit twiddlement question: greater of two popcounts by Zach Wegner, CCC, August 06, 2009 » Bit-Twiddling
 * Bit twiddling question, part 2: arbitrary bitscan order by Zach Wegner, CCC, August 11, 2009

2010 ...

 * Re: DTS Structure by Zach Wegner, CCC, May 29, 2010 » Iterative Search
 * Zach, is this true? by Gabor Szots, CCC, June 06, 2010
 * Re: An extremely interesting topic... by Zach Wegner, CCC, June 07, 2010
 * WCCC games by Zach Wegner, CCC, September 25, 2010 » WCCC 2010
 * Haswell New Instructions by Zach Wegner, CCC, September 09, 2011 » BMI2 PEXT/PDEP Bitboards

=External Links=
 * Zach Wegner's ICGA Tournaments
 * zwegner (Zach Wegner) · GitHub

=References= Up one Level