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Subject: Re: Requiem's results (and qsearch explosion stopped!)

Author: Uri Blass

Date: 09:31:51 12/30/01

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On December 30, 2001 at 11:58:02, Severi Salminen wrote:

>Well, I have to say that now I have nothing to worry about. If I exclude horizon
>nodes from qnodes and include them to normal nodes, it looks like my engine is
>working very properly. Now the ratio qnodes/all_nodes is 21.8% which should be
>enough. Again, it is only a matter of definition. Was it Sune who also reported
>80% of nodes belong to qsearch, this might be the reason.

probably it was not the case with sune because he also reported
that his program with limited qsearch could see 1 ply deeper.

It was not the case with his program.

I still believe that limiting the qsearch may be productive but
I agree that deciding to stop it after x plies is not the best idea.

I do not want the qsearch to explode in rare cases and I believe that there must
be a way to do it with no demage in the regular case and allowing less captures
in later plies may be better.

I can add that my result for depth 9 is
18,340,855 qnodes out of 157,635,152 nodes

main line 1.exd5 Qxd5 2.Ne2 exd4 3.Nbc3 Qe6 4.Qxd4 Nc6 5.Qe3

I decided to stop it and not to search for depth 10

Uri



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