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'''[[Main Page|Home]] * [[Engines]] * Nightmare GER'''
[[FILE:John Henry Fuseli - The Nightmare.JPG|border|right|thumb|[[:Category:Henry Fuseli|Henry Fuseli]] - The Nightmare<ref>[[:Category:Henry Fuseli|Henry Fuseli]] - The Nightmare, 1781, [https://en.wikipedia.org/wiki/Detroit_Institute_of_Arts Detroit Institute of Arts], [https://en.wikipedia.org/wiki/The_Nightmare The Nightmare from Wikipedia]</ref> ]]
'''Nightmare''',<br/>
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]].
=Description=
given in 1995 <ref>[https://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]]
=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==
* [https://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]
* [[:Category:Zbigniew Seifert|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 [[:Category:Zbigniew Seifert|Zbigniew Seifert]], [[:Category:Hans Koller|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]
: {{#evu:https://www.youtube.com/watch?v=quDkSd2ic3g|alignment=left|valignment=top}}
=References=
<references />
'''[[Engines|Up one level]]'''
[[Category:Henry Fuseli]]
[[Category:Hans Koller]]
[[Category:Zbigniew Seifert]]
[[Category:Demonology]]
[[FILE:John Henry Fuseli - The Nightmare.JPG|border|right|thumb|[[:Category:Henry Fuseli|Henry Fuseli]] - The Nightmare<ref>[[:Category:Henry Fuseli|Henry Fuseli]] - The Nightmare, 1781, [https://en.wikipedia.org/wiki/Detroit_Institute_of_Arts Detroit Institute of Arts], [https://en.wikipedia.org/wiki/The_Nightmare The Nightmare from Wikipedia]</ref> ]]
'''Nightmare''',<br/>
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]].
=Description=
given in 1995 <ref>[https://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]]
=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==
* [https://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]
* [[:Category:Zbigniew Seifert|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 [[:Category:Zbigniew Seifert|Zbigniew Seifert]], [[:Category:Hans Koller|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]
: {{#evu:https://www.youtube.com/watch?v=quDkSd2ic3g|alignment=left|valignment=top}}
=References=
<references />
'''[[Engines|Up one level]]'''
[[Category:Henry Fuseli]]
[[Category:Hans Koller]]
[[Category:Zbigniew Seifert]]
[[Category:Demonology]]
