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an experimental chess program by Maarten van der Meulen and chess testbed of his research on search algorithms, like Alpha-Beta, and the best-first algorithms SSS*, Conspiracy number and Proof-number search, including parallel Conspiracy number search [1] for instance in 1988 on a 10-processor system [2], and evaluation [3]. In his ICCA Journal paper [4] , Maarten van der Meulen mentions experiments with cn-search as published in 1988 by David McAllester [5] in Arachne not encouraging [6] , and introduced a new variation dubbed applied cn-search [7]. Arachne played six consecutive Dutch Computer Chess Championships from 1985 until 1990.
Gustave Doré: Arachne [8]

Selected Games


DOCCC 1989, round 1, Dappet - Arachne [9]
[Event "DOCCC 1989"]
[Site "Leiden NED"]
[Date "1989.10.??"]
[Round "01"]
[White "Dappet"]
[Black "Arachne"]
[Result "1-0"]
1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Nxd5 6.d4 f6
7.dxe5 Ncb4 8.exf6 Nxf6 9.Bf7+ Ke7 10.Qe2+ Kd6 11.Qd2+ Nbd5
12.Bxd5 Qe8+ 13.Ne4+ Ke7 14.O-O Nxe4 15.Bxe4 Qa4 16.Re1 Be6
17.Bd5 Qd7 18.Rxe6+ Kd8 19.Bxb7 Qxd2 20.Nxd2 Rb8 21.Bc6 Be7
22.Nb3 Rf8 23.Be3 Bd6 24.Bxa7 Rb4 25.Rae1 Bxh2+ 26.Kxh2 Rbf4
27.Re8+ Rxe8 28.Rxe8# 1-0


DOCCC 1989, round 2, Arachne - Duck [10]
[Event "DOCCC 1989"]
[Site "Leiden NED"]
[Date "1989.10.??"]
[Round "2"]
[White "Arachne"]
[Black "Duck"]
[Result "1-0"]
1.d4 a6 2.e4 Nf6 3.e5 Nd5 4.c4 Nb4 5.Qd2 e6 6.Be2 d5 7.cxd5 Nxd5 8.Nf3 Nc6
9.O-O Be7 10.Nc3 Rf8 11.Qc2 Nxc3 12.bxc3 h5 13.Qh7 g5 14.Qxh5 Rg8
15.Be3 Bd7 16.h3 Na5 17.Qg4 Kf8 18.h4 Bc6 19.Nxg5 Rg7 20.Nxe6+ fxe6
21.Bh6 Bf6 22.exf6 Qxf6 23.Qxg7+ Qxg7 24.Bxg7+ Kxg7 25.Bg4 Rh8
26.h5 Be8 27.Rab1 Bxh5 28.Bxe6 Bg6 29.Rb2 Re8 30.Re1 Bf5 31.Re5 Rxe6
32.Rxf5 b6 33.g3 Re1+ 34.Kg2 Rc1 35.Rf3 Re1 36.Rb4 Re2 37.a3 Ra2 38.a4 Rd2
39.Re3 Kf6 40.Kf3 Kf7 41.g4 Rc2 42.d5 Rd2 43.Rf4+ Kg8 44.c4 c6 45.Re8+ Kg7
46.Re7+ Kg8 47.Rf6 cxd5 48.cxd5 Nc4 49.Rc6 Kf8 50.Re4 b5 51.Re2 Rxd5
52.Rxa6 bxa4 53.Rxa4 Rd4 54.Ra7 Rd5 55.Kf4 Rd6 56.g5 Nb6 57.f3 Nd7
58.Kf5 Rd4 59.Ra8+ Nb8 60.Rxb8+ Kf7 61.g6+ Kg7 62.Re7+ Kh6 63.Rh8# 1-0

See also



Arachne elsewhere

External Links

Chess Program



  1. ^ Maarten van der Meulen (1988). Parallel Conspiracy-Number Search. M.Sc. thesis, Faculty of Mathematics and Computer Science, Vrije Universteit, Amsterdam
  2. ^ Dap Hartmann (1988). Report on the 8th Dutch National Computer-Chess Championship. ICCA Journal, Vol. 11, No. 4 » DOCCC 1988
  3. ^ Maarten van der Meulen (1989). Weight Assessment in Evaluation Functions. Advances in Computer Chess 5
  4. ^ Maarten van der Meulen (1990). Conspiracy-Number Search. ICCA Journal, Vol. 13, No. 1
  5. ^ David McAllester (1988). Conspiracy Numbers for Min-Max Search. Artificial Intelligence, Vol. 35, No. 1, pp. 287-310. ISSN 0004-3702.
  6. ^ Dap Hartmann, Peter Kouwenhoven (1989). The 9th Dutch Computer-Chess Championship. ICCA Journal, Vol. 12, No. 4 » DOCCC 1989
  7. ^ Maarten van der Meulen, Victor Allis, Jaap van den Herik (1990). A Comment on `Conspiracy-Number Search'. ICCA Journal, Vol. 13, No. 2
  8. ^ Illustration by Gustave Doré, 1861, for Dante's Inferno, Cultural depictions of spiders from Wikipedia, Arachne from Wikipedia.de (German)
  9. ^ The chess games of Arachne (Computer) from chessgames.com
  10. ^ Downloads | Open Dutch Computer Chess Championships | Games

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