Cyclone

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Cyclone, an UCI compliant, derivative open source chess engine based on Fruit and Toga II, written by Norman Schmidt in C++, licensed under the GPL 3.0 . Cyclone 3.4 uses principal variation search, iterative deepening, MVV-LVA, transposition tables, null-move pruning, quiescence search, futility pruning, history pruning, lazy evaluation, razoring, and various search reductions and extensions. Cyclone's parallel search utilizes threads and a shared hash table.

=Cyclone xTreme= Cyclone xTreme, based on Fruit 2.1 by Fabien Letouzey, Toga II by Thomas Gaksch, Grapefruit 1.0 by ThinkingALot, 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.

=Forum Posts=

2008

 * Cyclone 1.0 beta by Norman Schmidt, CCC, July 26, 2008
 * Cyclone 1.0 beta now available by Norman Schmidt, CCC, July 27, 2008
 * Cyclone 1.0 and Cyclops 1.0 available by Norman Schmidt, CCC, August 04, 2008
 * Cyclone 2.0 released by Norman Schmidt, CCC, November 03, 2008
 * Cyclone 2.1 released by Norman Schmidt, CCC, November 05, 2008
 * Cyclone 2.3 released by Norman Schmidt, CCC, December 23, 2008

2009

 * Cyclone 3.4 released by Norman Schmidt, CCC,	February 01, 2009
 * Annals of testing an elusive engine by Rainer Neuhäusler, CCC, October 05, 2009
 * Cyclone xTreme II by dinosaur123, Rybka Forum, November 11, 2009

2010 ...

 * Cyclone / Fire ... question to Norman! by Frank Quisinsky, CCC, April 29, 2010
 * New version of Cyclone? by alpha123, CCC, August 25, 2010
 * Fruit and derivatives list ! by De Noose Daniel, CCC, August 31, 2019

=External Links=

Chess Engine

 * Cyclone from chesslogik.com
 * Posix ports of some recent version of Toga II by Michel Van den Bergh (Wayback Machine)
 * Fruit (software) - Derivatives from Wikipedia
 * Cyclone xTreme in CCRL 40/15

Misc

 * Cyclone from Wikipedia
 * cyclic - Wiktionary
 * Clone (disambiguation) from Wikipedia

=References= Up one Level