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Subject: Re: With 4 Man Tablebases, It accesses from 7 to 9 pieces, how accurate?

Author: Shep

Date: 00:37:08 08/06/99

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On August 06, 1999 at 00:33:02, Terry Ripple wrote:

> I sometimes see accesses from a total of 7 to 9 pieces still on the board and
>was wondering how accurate it`s analysis of the evaluation is and is the
>analysis more accurate when it shows alot more accesses like several thousand
>compared to 10 to 100 accesses or don`t this matter, as long as it`s showing
>that it reached the endgame tablebases? Please note that i only installed the
>four man tablebases in my Hiarcs7.32!

Hard to tell. In fact, there are some positions which actually take _longer_ to
solve if you have the endgame tablebases installed.
FIN 09 from LCT II is such an example.
Hiarcs 7.0 took about 18 minutes on the P6-233 to find it.
Thus one would assume that Hiarcs 7.32 would find it under 20 minutes on the
same machine, right? But it didn't.
I can only draw the conclusion that in this case tablebases were in fact
stopping the program from finding the best move.

But I think in general the benefit is bigger than the disadvantages.

---
Shep



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