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

Author: James Robertson

Date: 14:45:12 09/26/98

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On September 26, 1998 at 17:41:04, John Coffey wrote:

>On September 26, 1998 at 17:28:56, Bruce Moreland wrote:
>
>>
>>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).
>>
>>bruce
>
>I think that a person could easily write a program that would do 1M nodes per
>second (i.e throw out hashing, null moves, move ordering etc.), but it would be
>pretty dumb, because it would examining all sorts of branches of the tree that
>it would not need to examine.
>
>John Coffey

Yes, that was when my program had nothing but alpha-beta. Also, most of the
program is written in Assembly which increased my NPS over the C++ version by
>300%.

James



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