Author: Christophe Theron
Date: 08:57:16 01/26/01
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On January 26, 2001 at 11:21:46, Severi Salminen wrote:
>Hi!
>
>Once upon a time there was a funny creature called Nellie the NPS...
>
> If I remove SEE from my engine I get a 2x speed up in terms of NPS. This of
>course results in an increase in number of nodes to be searched. Overall it
>seems that with SEE the strenght is not much higher than without. The funny
>thing is also that removing all futility pruning code results another increase
>in NPS (about 2x-3x). It is likely that removing it also decreases the strenght.
> The point of this stupid message is that: DON'T MAKE ANY CONCLUSIONS OF
>STRENGHT BASED ON NPS.
>
>I have spoken...
>
>Severi "I'm tired" Salminen
What you say is extremely to the point. I have had similar results with Chess
Tiger. I can easily increase my NPS and beat everything else on NPS (on PC, I
mean), but my program would be significantly weaker.
The kind of NPS increase I'm talking about is not by removing chess knowledge. I
can keep exactly the same evaluation, and by changing several things in the
search (removing pruning algorithms), I can increase my NPS dramatically. But
the program will be weaker, even if it is 5x faster in NPS.
Christophe
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