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Subject: Re: How make Fritz execute brute force search?

Author: leonid

Date: 13:59:35 07/26/00

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On July 26, 2000 at 13:40:32, Tom Kerrigan wrote:

>On July 26, 2000 at 09:18:41, leonid wrote:
>>How ask Fritz execute brute force search? I have Fritz 6 but if it is possible
>>for some other version (even better DOS version), please say me.
>>Recently I went to see Fritz nodes per second performance. Very impressive! Only
>>maybe I am missing exact numbers. NPS tend to grow when search is done by brute
>>force. This is why I try to find where Fritz numbers stays in real. But Fritz,
>>in dispite of its performance, is not exactly open minded piece of software.
>>Even its NPS I was able to see only through my Hiarcs 7.32 program.
>>Thanks in advance,
>My search is selective only because of null-move. I believe this is also the
>case with Fritz.
>With null move on, my program searches 634k NPS. (BK, short searches)

On what hardware do you have 634k? I was very impressed with Fritz numbers only
because they were between 220 and 320k on AMD 400Mhz. Your numbers are almost
twice as fast.

On the same hardware average NPS for other best programs were, for similar
positions, between 140 and 180k. I see that you are more that lucky with

>With null move off, it searches 655k NPS.
>The difference is 3.3%.

Good to know that this difference is negligeable.

>Basically, I wouldn't worry how much faster Fritz is without null move, for
>three reasons:
>1) The difference is probably pretty insignificant
>2) You'd never want to run Fritz without null move in real-world situations
>3) You didn't write Fritz

With few exceptions (Hiarcs is the most flagrant one) I found that NPS is good
indicative of the strength of the chess program. Inside of Hiarcs package (tried
only few positions) Crafty had the best NPS immediately after Fritz. It is
probably the most strong engin after Fritz as well.


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