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Subject: Re: null-move vs non-null-move

Author: Alessandro Damiani

Date: 08:32:22 10/11/02

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You did not read! I never talked about selectivity 0!!


On October 11, 2002 at 08:04:21, Vincent Diepeveen wrote:

>On October 10, 2002 at 06:51:47, Alessandro Damiani wrote:
>
>
>Wrong, selectivity 0 at fritz gives it a complete fullwidth
>search.
>
>Quote: Frans Morsch
>
>>On October 10, 2002 at 02:01:51, Uri Blass wrote:
>>
>>>On October 09, 2002 at 23:06:48, Robert Hyatt wrote:
>>>
>>>>
>>>>
>>>>I had to stop the experiment sooner than I wanted, but I did find some
>>>>interesting things out.
>>>>
>>>>1.  at _very_ fast time controls (40 moves in 1 minute) null-move completely
>>>>destroys non-null-move
>>>>by a ridiculous margin.  (this ended something like 60 wins, 5 losses, 8 draws)
>>>>
>>>>2.  At longer time controls (40 moves in 10 minutes) non-null-move catches up
>>>>somewhat.  It still loses
>>>>far more than it wins, but not _nearly_ so bad as test 1.  (this was closer, but
>>>>with fewer games played)
>>>
>>>It seems based on your data that null move is more important for blitz and not
>>>for long time control.
>>>
>>>Interesting to know also the difference in plies
>>>
>>>If I compare depth after 3 minutes of search then I see for deep Fritz 3-5 plies
>>>difference at 3 minutes per move between selectivity 0 and the default value 2.
>>>
>>
>>By using a program with unknown source code you cannot be sure that
>>selectivity=2 is only related to null-move.
>>
>>Alessandro



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