Cyclone

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|| [[image:Low_pressure_system_over_Iceland.jpg link="http://en.wikipedia.org/wiki/File:Low_pressure_system_over_Iceland.jpg"]] ||~ || **Cyclone**,
an [[UCI]] compliant, [[Clones#Derivative|derivative]] [[Open Source Engines|open source chess engine]] under the [[Free Software Foundation#GPL|GNU General Public License 3.0]] written by [[Norman Schmidt]] in [[Cpp|C++]], based on [[Fruit]] and [[Toga]] <ref>[[http://en.wikipedia.org/wiki/Fruit_%28software%29#Derivatives|Fruit (software) - Derivatives from Wikipedia]]
</ref> <ref>IMPORTANT: Cyclone is a fork of Toga II 1.4b5 which has been relicensed under the GPL 3. Code from Cyclone cannot be reused in Fruit/Toga which is GPL 2+., [[http://hardy.uhasselt.be/Toga/posix_versions/|Posix ports of some recent version of Toga II]] by [[Michel Van den Bergh]]</ref>. Cyclone **3.4** uses [[Principal Variation Search|principal variation search]], [[Iterative Deepening|iterative deepening]], [[MVV-LVA]], [[Transposition Table|transposition tables]], [[Null Move Pruning|null-move pruning]], [[Quiescence Search|quiescence search]], [[Futility Pruning|futility pruning]], [[History Leaf Pruning|history pruning]], [[Lazy Evaluation|lazy evaluation]], [[Razoring|razoring]], and various search [[Reductions|reductions]] and [[Extensions|extensions]]. Cyclone's [[Parallel Search|parallel search]] utilizes [[Thread|threads]] using a [[Shared Hash Table|shared hash table]] <ref>[[http://www.autochess.com/forum/cyclone-t816.html|Cyclone]] by Aaron87747, [[Computer Chess Forums|autochess]], April 28, 2009</ref>.

Cyclone **xTreme**, based on [[Fruit|Fruit 2.1]] by [[Fabien Letouzey]], [[Toga|Toga II]] by [[Thomas Gaksch]], [[Grapefruit|Grapefruit 1.0]] by [[Vadim Demichev]], Toga CMLX 145e4 by [[Teemu Pudas]], and Cyclone 3.4 by Norman Schmidt, uses a configuration file to obtain more than 150 evaluation, material, search, and transposition table parameters <ref>[[http://users.telenet.be/chesslogik//cyclone.htm|Cyclone from chesslogik.com]]</ref>. ||
|| Polar cyclone  <ref>[[http://en.wikipedia.org/wiki/Polar_vortex|Polar cyclone]] near [[http://en.wikipedia.org/wiki/Iceland|Iceland]] on September 4, 2003, [[http://eastfire.gmu.edu/EOS900-04/Descloitres.html|Jacques Descloitres]], [[http://modis.gsfc.nasa.gov/|MODIS]] Rapid Response Team, [[http://en.wikipedia.org/wiki/NASA|NASA]]/[[http://en.wikipedia.org/wiki/Goddard_Space_Flight_Center|GSFC]], [[http://visibleearth.nasa.gov/view.php?id=68992|NASA Visible Earth: Low off Iceland]]</ref> ||~ ||^ ||
[[toc]]
=See also= 
* [[Fruit]] 
* [[Various Classifications#Meteorology|Meteorology]]
* [[Toga]]

=Forum Posts=
* [[http://www.talkchess.com/forum/viewtopic.php?t=22591|Cyclone 1.0 beta]] by [[Norman Schmidt]], [[CCC]], July 26, 2008
* [[http://www.talkchess.com/forum/viewtopic.php?t=22619|Cylone 1.0 beta now available]] by [[Norman Schmidt]], [[CCC]], July 27, 2008
* [[http://www.talkchess.com/forum/viewtopic.php?t=22794|Cyclone 1.0 and Cyclops 1.0 avaliable]] by [[Norman Schmidt]], [[CCC]], August 04, 2008
* [[http://www.talkchess.com/forum/viewtopic.php?t=24689|Cyclone 2.0 released]] by [[Norman Schmidt]], [[CCC]], November 03, 2008
* [[http://www.talkchess.com/forum/viewtopic.php?t=24748|Cyclone 2.1 released]] by [[Norman Schmidt]], [[CCC]], November 05, 2008
* [[http://www.talkchess.com/forum/viewtopic.php?t=25590|Cyclone 2.3 released]] by [[Norman Schmidt]], [[CCC]], December 23, 2008
* [[http://www.talkchess.com/forum/viewtopic.php?t=26344|Cyclone 3.4 released]] by [[Norman Schmidt]], [[CCC]],	February 01, 2009
* [[http://www.autochess.com/forum/cyclone-t816.html|Cyclone]] by Aaron87747, [[Computer Chess Forums|autochess]], April 28, 2009 
* [[http://www.talkchess.com/forum/viewtopic.php?p=294764|Annals of testing an elusive engine]] by [[Rainer Neuhäusler]], [[CCC]], October 05, 2009
* [[http://rybkaforum.net/cgi-bin/rybkaforum/topic_show.pl?tid=12591|Cyclone xTreme II]] by dinosaur123, [[Computer Chess Forums|Rybka Forum]], November 11, 2009
* [[http://www.talkchess.com/forum/viewtopic.php?t=34059|Cyclone / Fire ... question to Norman!]] by [[Frank Quisinsky]], [[CCC]], April 29, 2010

=External Links=
==Chess Engine==
* [[http://users.telenet.be/chesslogik//cyclone.htm|Cyclone from chesslogik.com]]
* [[http://en.wikipedia.org/wiki/Fruit_%28software%29#Derivatives|Fruit (software) - Derivatives from Wikipedia]]
* [[http://hardy.uhasselt.be/Toga/posix_versions/|Posix ports of some recent version of Toga II]] by [[Michel Van den Bergh]]
==Cyclone==
* [[http://en.wikipedia.org/wiki/Cyclone|Cyclone from Wikipedia]]
* [[http://en.wiktionary.org/wiki/cyclic|cyclic - Wiktionary]]
* [[http://en.wikipedia.org/wiki/Clone|Clone (disambiguation) from Wikipedia]]

=References= 
<references />
=What links here?= 
[[include page="Cyclone" component="backlinks" limit="40" ]]
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