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Subject: Re: Null move

Author: James Robertson

Date: 17:42:40 02/05/99

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On February 05, 1999 at 02:26:49, Bruce Moreland wrote:

>
>On February 05, 1999 at 00:27:05, James Robertson wrote:
>
>>You must be waving magic dust on your program. Here are some results from my
>>program on the 11 positions in the nolot test. The null move doesn't seem to
>>have tremendous advantage, although in several cases it was substantially
>>better.  Thrice the null move took more time than without.
>>
>>I ran each position for one minute on my P233, and recorded the times for the
>>last completed ply. No hash tables, but pawn hash was 1MB.
>
>I looked at your times and you have to be doing something totally wrong.
>
>You get into a node, you check the hash and cut off if necessary, and if you
>aren't in check you do a search that's two plies shallower than you'd ordinarily
>go here (go into quiescence if appropriate), and if you come back >= beta, you
>cut off.  This should be a very common case.  If you don't cut off, you just
>generate moves and search them.
>
>Works like a charm right away.
>
>bruce

I honestly do not know what I am doing wrong.... do you mind if I send you my
search function and if you could look for some bug in it? Thanks for any help,

James



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