Author: Uri Blass
Date: 07:04:45 07/24/02
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On July 24, 2002 at 09:59:04, Steffen Jakob wrote: >On July 24, 2002 at 09:50:24, Uri Blass wrote: > >>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. > >From the "CSS Sprechstunde" with Christophe Theron: > >"Eduard Nemeth: Is The Tiger nullmove free (genius is)? Stimmt es, dass der >ChessTiger nullmove -frei ist, wie zB. der Genius? > >CT: Null move is not the major selective search algorithm of Tiger." I did not say that null move is the only selective search algorithm of the top programs. I only said that all of them except Junior use null move pruning. Genius does not use null move pruning but Genius today is not considered as a top program. I am also not sure about hiarcs but I believe that it is using null move pruning. Uri
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