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Subject: Re: Position evaluations

Author: Richard A. Fowell (fowell@netcom.com)

Date: 12:00:28 12/29/98

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On December 29, 1998 at 14:15:40, Dan Kiski wrote:

>Do any other programs other than Fritz evaluate more than one position as you
>move?.

I'm not quite sure what you mean, but if you mean that the program
presents several suggested continuations, (what KK kalls K-var <grin>)
HIARCS does that. For example, if the position is:

rq2r1k1/5pp1/p7/4bNP1/1p2P2P/5Q2/PP4K1/5R1R w - -

and HIARCS is set to "monitor mode", "variations = 3", then
the analysis is shown for three lines:

 6»23    9 f5xg7  e8-f8  g7-f5  e5xb2  f5-h6+ g8-h8  h6xf7+ h8-g7  =  390
 6»23   10 f5-e3  b8-b7  e3-c4  a8-d8  f3-f5  e5-d4  =   92
 6»23   11 b2-b3  b8-c7  h4-h5  c7-d8  f3-e3  a8-c8  =   45

Note that the three lines shown aren't necessarily the same lines one would
see if one searched to the same depth as above, but used the "next best"
option repeatedly to find the best, second-best, third-best move.
In this example, the latter yields:

07   1.Nxg7 Rf8 Nf5 Bxb2 Nh6+ Kh8 Nxf7+ Kg7 =  390
07   1.h5 Qd8 g6 Qd2+ Rf2 Qg5+ Ng3 f6 Qb3+ Kh8 =  104
07   1.Ne3 Qb7 =   71

So, some doubt has been cast on the utility of this function.

There was a lot of discussion of this on r.g.c.c. a few years ago,
but I can't seem to get dejanews to search any earlier than
about Jan 1, 1996. Any suggestions?

Richard A. Fowell (fowell@netcom.com)





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