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Article #3234

Re: 7 move mate against GNUchess version 4.0 patchlevel 77

#3234
From: Douglas Swiggum
Date: Fri, 20 Feb 1998 00:00
31 lines
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Tim Mann wrote:
> The actual [bad] line in the book [representing the Legal Mate trap]
> is "e4 e5 Nf3 d6 Bc4 Bg4 Nc3 h6 Ne5 Bd1 Bf7 Ke7 Nd5"
> 
> Most likely in an earlier version of the book, there was a ? after the
> key losing move for Black, but it got lost somewhere along the line.
> ...as I recall, someone (I forget just who) deleted all the ?
> marks but left the bad lines in there, out of some kind of
> inexplicable confusion over why the ? marks had to be there.

Tim,

Thanks for the explanation.  I figured it had to be some kind of
book problem, since the mate happens only two moves beyond the
greedy but errant queen capture.  I guess the line in the book
should be:  e4 e5 Nf3 d6 Bc4 Bg4 Nc3 h6 Ne5 Bd1? Bf7 Ke7 Nd5
or e4 e5 Nf3 d6 Bc4 Bg4 Nc3 h6 Ne5 de5 Qg4 Nf6 which would either
let GNUchess know there is a blunder at 5... Bxd1? or give it
something reasonable to do instead like 5... dxe5.  (Is that right?)

How does one "look" at GNU's book, anyway?  Source code?

Keep the TRS-80 warm!
-- 
Douglas Swiggum, Senior Systems Programmer                 /`-_
                 University of Wisconsin--Madison         {     }/
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Room 321, Waisman Center  mailto:Swiggum@Waisman.Wisc.Edu   |___|
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Madison, WI  53705        voice: 608/263-3467  fax: 608/263-2918
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From: Douglas Swiggum <Swiggum@Waisman.Wisc.Edu>
Subject: Re: 7 move mate against GNUchess version 4.0 patchlevel 77
Date: 1998/02/20
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