Nightmare GER

**[[Home]] * [[Engines]] * Nightmare GER**
|| [[image:330px-John_Henry_Fuseli_-_The_Nightmare.JPG link="https://en.wikipedia.org/wiki/File:John_Henry_Fuseli_-_The_Nightmare.JPG"]] ||~   || **Nightmare**, 
a chess program by [[Reinhold Gellner]] and [[Gaby von Rekowski]], playing various tournaments in the late 80s and 90s, most notably the [[WMCCC 1989]], [[ACM 1990]], [[WMCCC 1990]], [[2nd Computer Olympiad#Chess|2nd Computer Olympiad 1990]], [[WMCCC 1991]], [[WCCC 1992]], [[WMCCC 1993]], [[WCCC 1995]], [[WMCCC 1995]], [[WMCCC 1996]], [[WMCCC 1997]], [[Aegon Tournaments]] and the early [[IPCCC|IPCCCs]]. ||
|| [[Arts#Fuseli|Henry Fuseli]] 1781, The Nightmarfe <ref>[[https://en.wikipedia.org/wiki/The_Nightmare|The Nightmare from Wikipedia]]</ref> ||~   ||^   ||
[[toc]]
=Description= 
given in 1995 <ref>[[http://www.game-ai-forum.org/icga-tournaments/program.php?id=18|Nightmare's ICGA Tournaments]]</ref> :
|| {{Completely written in [[C]], work on Nightmare started in 1989 as a non-commercial project. It is a [[Brute-Force|brute force]] program searching up to 7-ply in the middle-game with a selective search depth of up to 40 ply. Modified [[Null Move Pruning|null-move searches]], modified [[Singular Extensions|singular extensions]], [[Extensions#FractionalExtensions|part-ply extensions]] and a new idea of hashing related meaningful subtrees are special features of Nightmare.}}

{{The program also uses well known techniques like [[Killer Heuristic|killer-moves]], [[History Heuristic|history heuristic]], [[Principal Variation Search|principal variation search]] and [[Transposition Table|hash tables]] of 64,000 entries per side. The tournament [[Opening Book|opening book]] consists of about 40,000 moves. Endgame databases are NOT used. Last year, Nightmare was transferred to 32-bit under extended [[MS-DOS|DOS]] and it can now search 12,000 moves per second. The program's rating is about 2000ELO (German) on a [[x86|486-50]].}} ||

=Namesake=
* [[Nightmare NL|Nightmare]] by [[Joost Buijs]]

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

=Publications=
* [[Raymond Smullyan]] (**1982**). //[[http://www.mit.edu/people/dpolicar/writing/prose/text/epistemologicalNightmare.html|An Epistemological Nightmare]]//. [[Massachusetts Institute of Technology|MIT]] <ref>[[https://en.wikipedia.org/wiki/Epistemology|Epistemology from Wikipedia]]</ref>

=External Links= 
==Chess Engine==
* [[http://www.game-ai-forum.org/icga-tournaments/program.php?id=18|Nightmare's ICGA Tournaments]]
==Misc==
* [[https://en.wikipedia.org/wiki/Nightmare|Nightmare from Wikipedia]]
* [[https://en.wikipedia.org/wiki/Nightmare_%28disambiguation%29|Nightmare (disambiguation) from Wikipedia]]
* [[https://en.wikipedia.org/wiki/Knightmare_%28disambiguation%29|Knightmare (disambiguation) from Wikipedia]]
* [[Videos#ZbigniewSeifert|Zbigniew Seifert]] - McCoy's Nightmare, Hamburg, March 1974, [[https://en.wikipedia.org/wiki/YouTube|YouTube]] Video 
> [[https://de.wikipedia.org/wiki/NDR_Bigband|NDR Studio Band]] with [[Videos#ZbigniewSeifert|Zbigniew Seifert]], [[Videos#HansKoller|Hans Koller]], [[https://de.wikipedia.org/wiki/Adelhard_Roidinger|Adelhard Roidinger]], [[https://de.wikipedia.org/wiki/Janusz_Stefanski|Janusz Stefanski]], conductor [[https://de.wikipedia.org/wiki/Franz_Thon|Franz Thon]]
> [[media type="youtube" key="quDkSd2ic3g" width="560"]]

=References= 
<references />
=What links here?= 
[[include page="Nightmare GER" component="backlinks" limit="40" ]]
**[[Engines|Up one level]]**