Nightmare NL

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Nightmare, a private chess program by Joost Buijs. The first version of Nightmare was developed already during fall of 1977 on a Heathkit H8 with 8080 CPU @ 2 MHz and 16 kiB RAM, and made it's first moves in early 1978. It played some friendly matches against Schak-123 by Hans and Henk van der Liet, and Gabmol, the first program of Wim Rens and forerunner of Gambiet 80 and 81.

Nightmare had its official tournament debut at the 3rd Dutch Computer Chess Championship 1983, and played further 12 Dutch Open Computer Chess Championships until 1996, the 3rd Computer Olympiad 1991 the ICT 2002, and Aegon Tournaments from 1994 until 1997. After some years with less tournament activity, the new Nightmare started its comeback in 2010, playing the DOCCC 2010, ICT 2011, CCT Tournaments and ACCA World Computer Rapid Chess Championships, where it became strong runner-up behind Arasan at the WCRCC 2013 with 9½/11. Further, Nightmare played multiple TCEC  seasons, so far TCEC Season 6, TCEC Season 7 and TCEC Season 8.

=Selected Games=

DOCCC 1983
DOCCC 1983, round 6, Usurpator II - Nightmare [Event "DOCCC 1983"] [Site "Leiden NED"] [Date "1983.10.??"] [Round "06"] [White "Usurpator II"] [Black "Nightmare"] [Result "0-1"]

1.c4 e5 2.Nc3 Bc5 3.d3 d6 4.e3 Be6 5.Nge2 Nc6 6.Bd2 Nb4 7.Qb1 Nf6 8.a3 Nc6 9.b4 Bb6 10.c5 dxc5 11.bxc5 Bxc5 12.Qxb7 Bd7 13.Nb5 Rb8 14.Qa6 Rb6 15.Qa4 a6 16.Nbc3 Nb4 17.axb4 Bxa4 18.bxc5 Rb8 19.Rxa4 Qxd3 20.Nc1 Qd7 21.Rxa6 O-O 22.Nd3 e4 23.Ne5 Qe8 24.f4 Rb2 25.Bc4 Qd8 26.Bc1 Rxg2 27.Nxf7 Rxf7 28.Bxf7+ Kxf7 29.Ra5 Rc2 30.Na2 Qd3 31.Nc3 Qxc3+ 32.Kf1 Qd3+ 33.Ke1 Qe2# 0-1

WCRCC 2013
WCRCC 2013, round 6, Nightmare - Arasan [Event "WCRCC 2013"] [Site "Internet Chess Club"] [Date "2013.07.20"] [Round "6"] [White "Nightmare"] [Black "Arasan"] [Result "1/2-1/2"]

1.e4 c6 2.d4 d5 3.e5 Bf5 4.Nf3 e6 5.Be2 Nd7 6.O-O Bg6 7.Nbd2 Ne7 8.Nh4 c5 9.c3 Qb6 10.Ndf3 Be4 11.dxc5 Qxc5 12.Nd4 Nc6 13.Be3 Qe7 14.f3 Qxh4 15.Bf2 Qg5 16.fxe4 dxe4 17.Qa4 Ncxe5 18.Nb5 Qd8 19.Qxe4 a6 20.Bg3 Qb6+ 21.Kh1 axb5 22.Bxe5 Qc6 23.Qe3 Nxe5 24.Qxe5 f6 25.Rxf6 gxf6 26.Qxf6 Rg8 27.Bh5+ Rg6 28.Bxg6+ hxg6 29.Rf1 Kd7 30.Qf7+ Kd6 31.Rd1+ Ke5 32.h4 Rc8 33.Rd4 Bh6 34.Qxg6 Rh8 35.Rb4 Kd6 36.Qf6 Qe8 37.a4 Be3 38.Re4 Ba7 39.Qe5+ Kd7 40.Qxb5+ Kc8 41.Qe5 Qd8 42.Rc4+ Kd7 43.g3 Qb8 44.Qg7+ Kd6 45.Rb4 Qf8 46.Qxf8+ Rxf8 47.Rxb7 e5 48.Rxa7 e4 49.b3 e3 50.Ra6+ Kd5 51.c4+ Ke5 52.Ra5+ Ke4 53.Ra6 Rf1+ 54.Kg2 e2 55.Re6+ Kd3 56.g4 e1=Q 57.Rxe1 Rxe1 58.h5 Ke3 59.b4 Kf4 60.b5 Re2+ 61.Kf1 Kf3 62.a5 Ra2 63.Ke1 Ke3 64.Kf1 Rf2+ 65.Kg1 Kf3 66.b6 Rg2+ 67.Kf1 Ra2 68.Ke1 Ke3 69.Kd1 Kd3 70.Kc1 Kc3 71.Kd1 Kd3 72.Kc1 Kc3 73.Kd1 Kd3 1/2-1/2

=Namesake=
 * Nightmare by Reinhold Gellner and Gaby von Rekowski

=Publications=
 * Raymond Smullyan (1982). An Epistemological Nightmare. MIT
 * Joost Buijs (1995). Aegons' Nightmare. Computer Chess Reports Vol. 5 No. 2 pp. 5

=Forum Posts=
 * 2011 Fifth Annual ACCA WCRCC: Nightmare games by Joost Buijs, CCC, July 25, 2011 » WCRCC 2011
 * Nightmare games from ACCA WCRCC 2012 by Joost Buijs, CCC, July 15, 2012 » WCRCC 2012
 * Nightmare games from WCRCC 2013 by Joost Buijs, CCC, July 21, 2013 » WCRCC 2013

=External Links=

Chess Engine

 * Nightmare NL' ICGA Tournaments

Misc

 * Nightmare from Wikipedia
 * Nightmare (disambiguation) from Wikipedia
 * Knightmare (disambiguation) from Wikipedia
 * Nightmare - Wikisource, the free online library

=References=

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