Aristarch

a chess engine by Stefan Zipproth, compliant to the Chess Engine Communication Protocol as well as the Universal Chess Interface, running under Windows.
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 * [[image:Aristarchos.jpg link="http://de.wikipedia.org/w/index.php?title=Datei:Aristarchos_von_Samos_%28Denkmal%29.jpeg&filetimestamp=20120410095846"]] ||~ || **Aristarch**,

The development of Aristarch already started in 1995 and was first written in Basic, version 2 was mainly a C port, but version 3 was a complete rewrite in C++, using a strictly [|object oriented] design, utilizing bitboards to represent the board, and apparently rotated bitboards to generate sliding piece attacks. Version 4.0 includes several improvements, the most important being a completely new pawn evaluation routine, it otherwise has a rather speculative king safety evaluation. Beside commonly known search extensions and reductions, Version 4.21 introduced an original pruning method based on 8 simple conditions. Aristarch played the CCT4 and CCT5 online tournaments. || toc =Etymology= The name of the engine has its origin in the [|ancient Greek] [|astronomer] and [|mathematician] Aristarchus of Samos (310 BCE - ca. 230 BCE), who presented the first known model of [|Heliocentrism] that placed the [|Sun] at the center of the known [|universe] with the [|Earth] revolving around it. He calculated the [|sizes of the Sun and Moon], as well as their distances from the Earth in terms of Earth's radius.
 * Aristarchus of Samos ||~ ||^ ||

=See also=
 * Astronomy
 * List

=Forum Posts=
 * [|Exiciting Aristarch] by Sune Larsson, CCC, August 05, 2002
 * [|Re: To Stefan Zipproth (Aristarch)] by Stefan Zipproth, CCC, August 07, 2002
 * [|Amateur vs Prof: Aristarch 4.4 vs Nimzo 7.32 (2)] by Kurt Utzinger, CCC, August 10, 2002
 * [|Re: who is Aristarch ?] by John Merlino, CCC, August 12, 2002
 * [|Amateurs vs Professionals (Aristarch 4.4 vs Nimzo 7.32) 7,0-14,0] by Kurt Utzinger, CCC, August 16, 2002
 * [|List 512 UCI und Aristarch 4.37 ready for Download] by Andreas Aicher, CCC, January 26, 2004
 * [|Nice win from Aristarch 4.50] by Graham Banks, CCC, April 21, 2008
 * [|A New Version Of Aristarch] by David Schumaker, CCC, December 02, 2010

=External Links=

Chess Engine
> [|About Aristarch] > [|Inside Aristarch] > [|Aristarch of Samos from Chess engines...]
 * [|Chess engines... Aristarch, List]

Misc
> [|On the Sizes and Distances (Aristarchus) from Wikipedia]
 * [|Aristarch - Wiktionary]
 * [|Aristarchus (disambiguation) from Wikipedia]
 * [|Aristarchus of Samos from Wikipedia]
 * [|Aristarchus of Samos] from [|NNDB]
 * [|Aristarchus of Samothrace]
 * [|Aristarchus (crater) from Wikipedia]
 * [|3999 Aristarchus from Wikipedia]

=References= =What links here?= include page="Aristarch" component="backlinks" limit="40"
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