Article View: gnu.chess
Article #90Re: GNU Chess wins London computer chess tourney
From: Richard V. Nash
Date: Wed, 19 Aug 1992 20:31
Date: Wed, 19 Aug 1992 20:31
54 lines
2898 bytes
2898 bytes
In article <1992Aug19.142102.982@nbivax.nbi.dk> engelhardt@nbivax.nbi.dk
writes:
> In article <9208170054.AA02933@wheat-chex>, cracraft@ai.mit.edu (Stuart
> Cracraft) writes:
>
> > NOW GNU 3.1
> > White (time) Black (time)
> > 51) b2a3 6:51 c2c1B 2:28
>
> Why would anybody *ever* promote a pawn to a bishop?????? A queen should be
> able to do the job...
>
> --- Allan
> --
> Internet: Allan.Engelhardt@nbi.dk | Allan Engelhardt
> HEPnet: NBIVAX::ENGELHARDT | Niels Bohr Institute
> Bitnet/EARN: ENGELH at CERNVM | Blegdamsvej 17
> Phone direct: (+45)31424284<dial-tone>355 | DK-2100 Copenhagen
> Fax: (+45)31421016 | DENMARK
+----+----+----+----+----+----+----+----+
8 | | | | | | | | |
+----+----+----+----+----+----+----+----+
7 | | | | | | | | |
+----+----+----+----+----+----+----+----+
6 | *P | | | | | | *K | *P |
+----+----+----+----+----+----+----+----+
5 | | | | | | | | |
+----+----+----+----+----+----+----+----+
4 | P | | *B | | | | | *P |
+----+----+----+----+----+----+----+----+
3 | B | | | | | K | | |
+----+----+----+----+----+----+----+----+
2 | | | *P | *B | | | | |
+----+----+----+----+----+----+----+----+
1 | | | | | | | | |
+----+----+----+----+----+----+----+----+
a b c d e f g h
This is the position just before c2c1B. My guess as to why GNUchess did this is
because its evaluation function "reasoned" that it was better to go with 3
bishops against 1 than 2 against 1. If the pawn would have promoted to a queen,
no doubt it would have been taken by the bishop on a3. As the game went, the
white bishop moved away.
Sound plausable? Sound like something a silly machine would do?
--
+---------------------------------------------------------------+
| Richard V. Nash | Visual Understanding Systems, Inc. |
| nash@visus.com | Tel. (412)-488-3600 Fax. (412)-488-3611 |
+---------------------------------------------------------------+
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<1992Aug19.203154.9226@visus.com>Path:
arc1-ca.pugleaf.net!sparky!uunet!stanford.edu!ames!elroy.jpl.nasa.gov!swrinde!mips!darwin.sura.net!udel!rochester!cantaloupe.srv.cs.cmu.edu!crabapple.srv.cs.cmu.edu!ibis!menu!tuna!usenetReferences:
<1992Aug19.142102.982@nbivax.nbi.dk>Show Full Headers
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Path: arc1-ca.pugleaf.net!sparky!uunet!stanford.edu!ames!elroy.jpl.nasa.gov!swrinde!mips!darwin.sura.net!udel!rochester!cantaloupe.srv.cs.cmu.edu!crabapple.srv.cs.cmu.edu!ibis!menu!tuna!usenet From: nash@visus.com (Richard V. Nash) Newsgroups: gnu.chess Subject: Re: GNU Chess wins London computer chess tourney Message-ID: <1992Aug19.203154.9226@visus.com> Date: 19 Aug 92 20:31:54 GMT References: <1992Aug19.142102.982@nbivax.nbi.dk> Sender: usenet@visus.com (Usenet news reciever) Reply-To: nash@visus.com Organization: Visual Understanding Systems, Pgh PA Lines: 54 Nntp-Posting-Host: pizza.visus.com