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Subject: Re: Evaluation Jumps in Gambit Tiger II and other misteries...

Author: Vincent Diepeveen

Date: 07:30:22 04/04/01

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On April 04, 2001 at 10:17:02, Fernando Villegas wrote:

>Hi all:
>I have completed, until now, two games againts the beast, both 40 moves in 90
>minutes. And both I lost after tough fight. So what: I expected that and in fact
>I expect that againts almost every top program. What I go for is to get fun,
>FUN.
>
>Well, looking at the computer as he thought answers to my moves I realized some
>curious facts. First, the incredible great jumps in his evaluation from one
>second to another, from one ply to the next. I am talking of going from, say,
>+.90 to 0.00. My guess is that behind that  there is not just a monolitic
>evaluation package of code, but a system of specific modules doing the job
>according to circunstances. I have seen changes in every program when going to
>deeper plies, but this changes by Gambit are a lot more deep and happens very
>fast.

Well if it's not a tactical fail high/fail low, then it sure is a bug
if a program jumps from 0.90 to 0.00 without good reason.



>The second thing that attracted my atention was its use of time. In one of the
>games Gambit was thinking more than 15 minutes, probably a lot more -I did not
>take the time accurately; I was, as always, doing three things at the same time,
>including supping a glass of red wine and lessoning Frank Sinatra- and the
>position I produced with my move was somewhat intriguing BUT not that
>intriguing. It was as if an altoguether different code was putted in action to
>reasses the position from scratch.
>
>I do not believe Christophe is going to show his secrets here just like that,
>but I wonder if he could tell us a little bit of the new techniques he is
>clearly using. Of course maybe I am totally wrong....
>
>
>fernando



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