Duck

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|| [[image:duck.jpg link="http://www.dennisbreuker.nl/duck/index.html"]] ||~   || **Duck**,
a chess program written in [[C]] by [[Dennis Breuker]], competing at three [[Dutch Open Computer Chess Championship|Dutch Open Computer Chess Championships]], the [[DOCCC 1989]], the [[DOCCC 1992]], and with the same version the [[DOCCC 2000]], further playing the [[4th Computer Olympiad#Chess|4th Computer Olympiad 1992]] in [[https://en.wikipedia.org/wiki/London|London]].  ||
|| Duck <ref>[[http://www.dennisbreuker.nl/duck/index.html|Duck]] by [[Dennis Breuker]] (Dutch)</ref> ||~ ||^ ||
[[toc]]
=Description=
from [[Mark Uniacke|Mark Uniacke's]] report on the [[4th Computer Olympiad|4th Computer Olympiad 1992]] <ref>[[Mark Uniacke]] (**1992**). //The Chess Tournament of the AST 4th Computer Olympiad//. [[ICGA Journal#15_3|ICCA Journal, Vol. 15, No. 3]]</ref>:
|| {{[[Search|Search techniques]] used are [[Null Window|minimal-window]], [[Alpha-Beta|alpha-beta]] with [[Extensions|extensions]] for [[Check Extensions|check evasion]], [[Recapture Extensions|recaptures]], [[Singular Extensions|singular moves]] and [[Promotions|promotions]]. [[Move Ordering|Move ordering]] is by [[History Heuristic|history heuristic]], [[Refutation Move|refutation]] and [[Hash Move|transposition-table moves]] and [[Captures|captures]]. Positional values may range up to +/- 1 Pawn. Development time is 2 years on a very part time basis.}} ||
[[#Prover]]
==Prover==
**Prover** was a [[Proof-Number Search]] implementation for chess, using chess-specific routines of Duck. Provers only goal was [[Mate Search|searching for mate]] <ref>[[Dennis Breuker]], [[Victor Allis]], [[Jaap van den Herik]] (**1994**). //How to Mate: Applying Proof-Number Search//. [[Advances in Computer Chess 7]], reprint as [[http://www.top-5000.nl/ps/Mate%20in%2038-%20applying%20proof%20number%20search%20to%20chess.pdf|Mate in 38: Applying Proof-Number Search]] from [[Ed Schroder|Ed Schroder's]] [[http://www.top-5000.nl/prostuff.htm|Programmer's Stuff site]] » [[Proof-Number Search]]</ref>. 

=See also=
* [[Various Classifications#Bird|Bird]]

=Publications=
* [[Dennis Breuker]], [[Victor Allis]], [[Jaap van den Herik]] (**1994**). //How to Mate: Applying Proof-Number Search//. [[Advances in Computer Chess 7]], reprint as [[http://www.top-5000.nl/ps/Mate%20in%2038-%20applying%20proof%20number%20search%20to%20chess.pdf|Mate in 38: Applying Proof-Number Search]] from [[Ed Schroder|Ed Schroder's]] [[http://www.top-5000.nl/prostuff.htm|Programmer's Stuff site]] » [[Proof-Number Search]]

=Forum Posts=
* [[http://www.stmintz.com/ccc/index.php?id=169742|1 Hour CCR Test/Zarkov and Duck/Updated Summary]] by [[Peter Berger]], [[CCC]], May 14, 2001 » [[CCR One Hour Test]]

=External Links=
==Chess Engine==
* [[http://www.grappa.univ-lille3.fr/icga/program.php?id=308|Duck's ICGA Tournaments]]
* [[http://www.dennisbreuker.nl/duck/index.html|Duck]] by [[Dennis Breuker]] (Dutch)
==Duck Misc==
* [[https://en.wikipedia.org/wiki/Duck|Duck from Wikipedia]]
* [[https://en.wikipedia.org/wiki/Duck_decoy_%28structure%29|Duck decoy (structure) from Wikipedia]] » [[Decoying]]
* [[https://en.wikipedia.org/wiki/Duck_decoy_%28model%29|Duck decoy (model) from Wikipedia]] 
* [[https://en.wikipedia.org/wiki/Duck_test|Duck test from Wikipedia]]
* [[https://en.wikipedia.org/wiki/Duck_typing|Duck typing from Wikipedia]]
* [[https://en.wikipedia.org/wiki/Ducks_Unlimited|Ducks Unlimited from Wikipedia]]
* [[https://en.wikipedia.org/wiki/Digesting_Duck|Digesting Duck]] by [[https://en.wikipedia.org/wiki/Jacques_de_Vaucanson|Jacques de Vaucanson]]
> [[image:Duck_of_Vaucanson.jpg link="https://en.wikipedia.org/wiki/Digesting_Duck"]]
* [[https://en.wikipedia.org/wiki/Duck_%28disambiguation%29|Duck (disambiguation) from Wikipedia]]
* [[https://en.wikipedia.org/wiki/Citro%C3%ABn_2CV|Citroën 2CV from Wikipedia]]
* [[https://en.wikipedia.org/wiki/List_of_fictional_ducks|List of fictional ducks from Wikipedia]]
* [[Videos#PatMetheny|Pat Metheny]] & [[https://en.wikipedia.org/wiki/Anna_Maria_Jopek|Anna Maria Jopek]] - [[http://pl.wikipedia.org/wiki/Cyraneczka|Cyraneczka]] ([[https://en.wikipedia.org/wiki/Leszek_Mo%C5%BCd%C5%BCer|Leszek Możdżer]] - Piano), [[https://en.wikipedia.org/wiki/YouTube|YouTube]] Video
> [[media type="custom" key="25928188"]]

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