Duck

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Duck, a chess program written in C by Dennis Breuker, competing at three 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 1992 in London.

=Description= from Mark Uniacke's report on the 4th Computer Olympiad 1992 : Search techniques used are minimal-window, alpha-beta with extensions for check evasion, recaptures, singular moves and promotions. Move ordering is by history heuristic, refutation and transposition-table moves and captures. Positional values may range up to +/- 1 Pawn. Development time is 2 years on a very part time basis.

Prover
Prover was a Proof-Number Search implementation for chess, using chess-specific routines of Duck. Provers only goal was searching for mate.

=Publications=
 * Dennis Breuker, Victor Allis, Jaap van den Herik (1994). How to Mate: Applying Proof-Number Search. Advances in Computer Chess 7, reprint as Mate in 38: Applying Proof-Number Search from Ed Schroder's Programmer's Stuff site » Proof-Number Search

=Forum Posts=
 * 1 Hour CCR Test/Zarkov and Duck/Updated Summary by Peter Berger, CCC, May 14, 2001 » CCR One Hour Test

=External Links=

Chess Engine

 * Duck's ICGA Tournaments
 * Duck by Dennis Breuker (Dutch)

Duck Misc

 * Duck from Wikipedia
 * Duck decoy (structure) from Wikipedia » Decoying
 * Duck decoy (model) from Wikipedia
 * Duck test from Wikipedia
 * Duck typing from Wikipedia
 * Ducks Unlimited from Wikipedia
 * Digesting Duck by Jacques de Vaucanson
 * [[FILE:Duck of Vaucanson.jpg|none|border|text-bottom|320px]]


 * Duck (disambiguation) from Wikipedia
 * Citroën 2CV from Wikipedia
 * List of fictional ducks from Wikipedia
 * Pat Metheny & Anna Maria Jopek - Cyraneczka (Leszek Możdżer - Piano), YouTube Video

=References= Up one Level