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Subject: Re: Fritz 5.32 - Analysis - Hash Tables

Author: Paulo Soares

Date: 00:32:10 07/30/99

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On July 29, 1999 at 20:45:33, Alan Grotier wrote:

>
>300Mhz machine with 64mb ram.
>Fritz 5.32 hash tables set at 42mb.
>Correspondence analysis set for 2hrs per move but have observed that hash tables
>can fill 100% anywhere from 5 to 15 min's depending on the position.
>
>Is there any advantage to be gained by letting the program analyse a position
>for long periods (overnight)une fois the hash tables are completely full?
>
>Salutations:Alan

When HT is full, the analyses is made in a bigger time, of form
that the program goes to need a great time to arrive many times
doubtful results. If you want to make better analysis of a
position, in less time, I think to be better use the team
man+machine, mainly with chessbase engines. What I understand for
man+machine:

1. Put the position.

2. Choose Infinite analyses, and choose the number of moves
   that you want to see, pressing the bottons "+" or "-".
   This bottons are finded above the counter nodes.In the majority
   of the cases I choose N=4.

3. Leaves the program to analyze the position for approximately
   3 min and choose one move, established in your experience,or one
   that is between the N moves, and study the main variants, always
   forcing the program to play a move.

4. Choose another move from the inicial position and make another
   study, and thus for ahead, until giving for satisfied with the
   examination of the position.

The great advantage of this method is that when you force the program
to make a move, you gained 1 ply, what it is not little thing in
time. In an analysis of that type, you  arrives to gain between 5 and
15 ply(!),  depending on the patience that you have to make the
analyses.
The disadvantage is that you can lose a more advantageous variant
if leave the program to analyze the position for some hours.
My experience with this type of analysis is that the advantages
compensate the disadvantages, without doubt.
I think that GMs and his team, use this method to found theoretical
novelties.

Paulo Soares, from Brazil



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