Author: Uri Blass
Date: 01:53:16 02/06/06
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On February 06, 2006 at 02:42:22, Andre Reffhaug wrote:
>Hello,
>
>I've been looking at Fruit, Rybka and the other engines, and a little while ago
>I started noticing the N/s-numbers. Fruit says it is calculating somewhere
>around 500.000 N/s, so do Fritz and Hiarcs etc. But, to my surprise, Rybka
>always says it is calculating somewhere around 50.000 N/s, which without any
>knowledge of these kinds of things seems extremely low when you look at the
>other engines. Anyone have an explanation?
>
>Regards,
>André
Yes
some possible explanations:
1)Rybka has in it's code something like
printf("%d , nodes/10); and not
printf("%d , nodes);
2)Rybka does not have nodes++; after every move that it makes but only after
part of the moves that it makes.
Note that I can easily reduce the number of nodes that is reported by movei by
one of these changes.
It is also possible that rybka has an expensive evaluation but my guess is that
it is not the right explanation.
Uri
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