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

Author: Alessandro Damiani

Date: 03:51:47 10/10/02

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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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