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Subject: Re: question for programmers

Author: Uri Blass

Date: 06:50:24 07/24/02

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On July 24, 2002 at 09:36:33, Slater Wold wrote:

>On July 24, 2002 at 09:11:54, K. Burcham wrote:
>
>>
>>
>>I am curious how you look at operating systems and the chess software we use,
>>in relation to limitations due to hardware speed increases.
>>
>>do you think the operating systems as we know them can handle the speed
>>increases we will see over the next few years. I would think that there is some
>>sort of limitation that the current operating systems could handle when pushed
>>running a chess program at greater speeds.
>>
>>also the same for chess programs. can the chess code, the way it is written
>>today, function without errors at greater speed increases. what do you see is
>>the limitation of our chess programs when it comes to hardware speed increases?
>
>The only thing I will say on this topic is that I know when *some* engines are
>getting 10M+ nps SEE and null move are going to back fire.

I do not know it.

null move without detecting zugzwangs is going to back fire at some speed
but we are not close to that speed.

I do not believe that with 10M nodes per second null move is going to be counter
productive.

>
>Of course, some programs like Rebel don't use null move, so they will be
>unaffected.

I remember from previous post of Ed that the latest Rebel use null move pruning
and null move pruning is more productive at long time control(exactly against
your intuition and the intuition of the deep blue team).

I believe that today Junior is the only top program that does not use null move
pruning.

Null move without zugzwang detection may be counter productive when zugzwangs
are going to be one of the main reasons for programs to lose games.

It is not going to happen even at 200M nodes per second.

Uri



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