Computer Chess Club Archives




Subject: Re: Nodes per second........

Author: Bruce Moreland

Date: 14:28:56 09/26/98

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On September 26, 1998 at 17:21:58, James Robertson wrote:

>What is a reasonable number of NPS for a program to search if it has an average
>sized evaluation procedure? I.E. what does Crafty get? Chessmaster? Comet? My
>program started out searching a very nice number of nodes per second, but as I
>added stuff that number decreased dramatically from about 600,000 to 160,000. By
>the time I finish the evaluation function (which is currently like 20 lines),
>I'm afraid it will be down to like 5,000 NPS on my P233! At what point should I
>get worried?

When it starts to play badly.

How did you achieve 600K nps on a normal machine?  Are you counting nodes the
way most of the rest of us are?  The way most of us do it is that a node is a
call to "search" or "quies", regardless of what happens after the call is made
(a node that cuts off via the hash table is still counted).


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