Zzzzzz
Zzzzzz 5 GUI written in Delphi [1] Zzzzzz, (ZZZZZZ)
an open source chess program under the GNU GPL by Gijsbert Wiesenekker written in C, and Version 5 (1998) in Pascal with a Delphi GUI for Windows platforms [2]. A Chess Engine Communication Protocol compliant Zzzzzz 3.5.1 for Windows/ Linux 32 is available from Jim Ablett’s site. Zzzzzz had its debut at the DOCCC 1991, and further played many Dutch Open Computer Chess Championships and International CSVN Tournaments, as well as the IPCCC 1994 and Aegon 1997. Already at the DOCCC 1993, Zzzzzz 3.0 was able to play on five machines in parallel [3]. The parallel alpha-beta routine was built around a public domain massively parallel computing environment, PVM. Meanwhile version 3.4 has moved to version 6, which still is command-line driven, but has evolved using bitboards, static exchange evaluation, null move, and extensions. It can search in parallel on two or three nodes with a shared hash table.
Quiescence Search
In Zzzzzz 3 the quiescence search looked like this, as explained by Gijsbert Wiesenekker in 1994 [4] :
Testing
Gijsbert Wiesenekker on evaluation patterns and his testing approach [5]:
Games
Clash of the Consonants
IPCCC 1994, round 7, Zzzzzz - Xxxx
DOCCC 2007
DOCCC 2007, round 7, Zzzzzz - Deep Junior [6]
Forum Posts
1993
- Processors needed for ZZZZZZ 3.0 by Gijsbert Wiesenekker, rec.games.chess, November 12, 1993
- ZZZZZZ 3.0 plays in Dutch Comp. Chess Champ. 1993 by Gijsbert Wiesenekker, rec.games.chess, November 15, 1993
- Beta sites needed for ZZZZZZ 4.0 by Gijsbert Wiesenekker, rec.games.chess, November 16, 1993
- ZZZZZZ 3.1 beta available by Gijsbert Wiesenekker, rec.games.chess, November 23, 1993
1994
- zzzzzz 3.2 available by Gijsbert Wiesenekker, rec.games.chess, January 04, 1994
- Re: Efficient quiescence by Gijsbert Wiesenekker, rec.games.chess, January 22, 1994
- ZZZZZZ-3.3a1 available by Gijsbert Wiesenekker, rec.games.chess, February 23, 1994
- Re: Alpha-beta inconsistencies by Gijsbert Wiesenekker, rec.games.chess, February 25, 1994
- zzzzzz-3.31 available by Gijsbert Wiesenekker, rec.games.chess, April 06, 1994
- WANTED: beta testers for Massively Parallel ZZZZZZ by Gijsbert Wiesenekker, rec.games.chess, July 08, 1994
- ZZZZZZ 3.4 available by Gijsbert Wiesenekker, rec.games.chess, July 28, 1994
- Re: Chess Program Too Slow – Part II by Gijsbert Wiesenekker, rec.games.chess, December 01, 1994
1995 …
- Need free MAC chess PICTS by Gijsbert Wiesenekker, rgcc, June 18, 1995
- ZZZZZZ-0.03 for the MAC by Gijsbert Wiesenekker, rgcc, December 19, 1995
- Re: Anyone know of a freeware chess game for Windows 95? by Gijsbert Wiesenekker, rgcc, November 09, 1998
2000 …
- ZZZZZZ by G. Wiesenekker by Dann Corbit, CCC, December 23, 2000
- Re: Delphi/Kylix Compiler by Tony Werten, CCC, March 16, 2001
psychological warfare by Georg von Zimmermann, CCC, March 17, 2001
- Zzzzzz takes Junior to school by Theo van der Storm, CCC, October 28, 2007
- ZZZZZZ 3.4 with winboard support available by Jim Ablett, CCC, April 13, 2008
- ZZZZZZ 3.4 with winboard support available by Jim Ablett, Winboard Forum, April 14, 2008
2010 …
- Re: Evaluation Function Fuss by Gijsbert Wiesenekker, World Draughts Forum, February 20, 2011
External Links
Chess Engine
- Index of /chess/engines/Jim Ablett/ZZZZZZ compiled by Jim Ablett, hosted by Kirill Kryukov
- Comp Zzzzzz chess games - 365Chess.com
- The chess games of Zzzzzz (Computer) from chessgames.com
Misc
- Urban Dictionary: zzzzzz
- Gee Whiz-z-z-z-z-z-z from Wikipedia
- etymology - How did the letter Z become to be associated with sleeping/snoring? - English Language and Usage - Stack Exchange
References
- ↑ Image from former ZZZZZZ - Homepage of Gijsbert Wiesenekker
- ↑ Re: Anyone know of a freeware chess game for Windows 95? by Gijsbert Wiesenekker, rgcc, November 09, 1998
- ↑ ZZZZZZ 3.0 plays in Dutch Comp. Chess Champ. 1993 by Gijsbert Wiesenekker, rec.games.chess, November 15, 1993
- ↑ Re: Efficient quiescence by Gijsbert Wiesenekker, rec.games.chess, January 22, 1994
- ↑ Re: Evaluation Function Fuss by Gijsbert Wiesenekker, World Draughts Forum, February 20, 2011
- ↑ Zzzzzz takes Junior to school by Theo van der Storm, CCC, October 28, 2007