Nexus

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[[FILE:kleinbottle_full.jpg|border|right|thumb|link=https://people.eecs.berkeley.edu/~ug/slide/gallery/kleinbottle/
 * Nexus of a chessboard Klein bottle ]]

Nexus, a private chess engine by Ralf Dörr and Norbert Esser with an own GUI , written in Pascal and compiled with Delphi. Nexus has lot of knowledge implemented, notably in the endgame concerning the rule of the square, passed pawn races and corresponding squares, and performs bitboard techniques similar to The Switch Approach. Nexus played the WCCC 2003 in Graz, the ICT 2004 and the DOCCC 2004, where it became runner up behind Diep, the IPCCC 2005, and the Chess960CWC 2005.

=Photos= DOCCC 2004, Ralf Dörr and Norbert Esser with the runner up trophy

=Selected Games=

IsiChess
DOCCC 2004, round 3, Nexus - IsiChess [Event "DOCCC 2004"] [Site "Leiden NED"] [Date "2004.10.16"] [Round "03"] [White "Nexus"] [Black "IsiChess"] [Result "1-0"]

1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Nf6 5.Nxc6 bxc6 6.e5 Qe7 7.Qe2 Nd5 8.c4 Ba6 9.b3 O-O-O 10.g3 Re8 11.Bb2 f6 12.Bg2 fxe5 13.O-O Nf6 14.Nd2 e4 15.Qe3 Kb8 16.Rab1 d5 17.b4 Ng4 18.Qa3 Bb7 19.Bd4 a6 20.Qc3 Qd7 21.f3 exf3 22.Nxf3 Bd6 23.c5 Bf8 24.a4 Re7 25.Bh3 h5 26.Ne5 Qe8 27.Nxc6+ Qxc6 28.b5 axb5 29.axb5 Qe8 30.Bxg4 hxg4 31.c6 Re4 32.Ra1 Bb4 33.Qxb4 Qe5 34.Ba7+ Kc8 35.cxb7+ Kxb7 36.Qa5 Kc8 1-0

The King
DOCCC 2004, round 7, Nexus - The King [Event "DOCCC 2004"] [Site "Leiden NED"] [Date "2004.10.23"] [Round "7"] [White "Nexus"] [Black "The King"] [Result "1-0"]

1.e4 c6 2.d4 d5 3.e5 Bf5 4.Bd3 Bxd3 5.Qxd3 e6 6.Be3 Bb4+ 7.c3 Ba5 8.Nf3 Ne7 9.Nbd2 Nd7 10.O-O h6 11.Nb3 O-O 12.Nh4 Bb6 13.f4 Rc8 14.f5 c5 15.f6 c4 16.Qe2 Ng6 17.Qh5 Ndxe5 18.Bxh6 gxf6 19.Kh1 cxb3 20.dxe5 Nxe5 21.axb3 f5 22.Rae1 Qf6 23.Nxf5 Ng6 24.Bg7 Qxf5 25.Rxf5 Kxg7 26.Rf3 Rh8 27.Qg5 Bd8 28.Qd2 Bb6 29.Ref1 f5 30.g4 Bc7 31.h3 f4 32.Qd4+ Be5 33.Qxa7 Rc7 34.Re1 Kf7 35.Rxe5 Nxe5 36.Rxf4+ Ke7 37.Qb6 Rhc8 38.Qb4+ Kd7 39.Rf6 Re8 40.g5 Nc6 41.Qg4 Rcc8 42.g6 Re7 43.h4 1-0

=Forum Posts=
 * Leiden 2004: Nexus - Ruffian 2.1.0, 1-0 by Eduard Nemeth, CCC, April 25, 2004
 * Re: ICT4 Leiden (9): Where's the game notation Nexus-Diep (1/2) by Vincent Diepeveen, CCC, April 26, 2004
 * Nexus - The King 1-0 (!) by Theo van der Storm, CCC, October 23, 2004

=External Links=

Chess Program

 * Nexus' ICGA Tournaments

Misc

 * Nexus (disambiguation) from Wikipedia
 * Gap junction (Nexus) from Wikipedia
 * Nexus (standard) from Wikipedia
 * Ultraman Nexus from Wikipedia
 * Nexus - En el Comienzo del Topos Uranos (Trailer 2017), YouTube Video

=References= Up one Level