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Subject: Re: null move efficiency

Author: Uri Blass

Date: 05:12:42 04/21/04

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On April 21, 2004 at 06:55:57, Sune Fischer wrote:

>
>>If threat extension does not help you to solve WAC141 at least 1 ply earlier
>>then it means that you probably have a bug in your implementation.
>
>It's a mate in 6 so it requires 12 plies (qsearch will detect the mate).
>The right move is found a ply 6 and the mate at ply 8, so every move almost gets
>extended to the max one ply.
>
>I have a different way of doing threat detections, it might interfere with this
>extension somehow.
>
>>I do not have threat extensions today but I believe that they can help when they
>>are done correctly.
>
>Hehe, how can I argue with that :)

I can add that the reason that I did not work much about it is the fact that I
do not like my ugly search code and I decided that I need to rewrite my
alphabeta but I still did not do it.

I can also add that you have 3 moves that threat mate in 1 in the line
Qxf4 Bxf4 Rxh5! gxh5 Rxh5! Bh6 Rxh6!

Uri



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