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Subject: Re: developing Junior (and other pro programs)

Author: Uri Blass

Date: 09:08:21 09/01/02

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On September 01, 2002 at 11:55:32, Vincent Diepeveen wrote:

>On September 01, 2002 at 10:20:08, Uri Blass wrote:
>
>if you search for aske plaat you will find his stuff on
>mtd online probably. i'm amazed that you don't understand
>that Frans is using nullmove.

I know that he is using null move but I do not use null move when I search the
line that is in the previous pv because I consider it a waste of time.

Null move is for prunning illogical lines.

The pv cannot be illogical line so the only case when I can save nodes by null
move pruning when I am in a pv line is when the position is zugzwang.
In other words I can save nodes only if null move pruning is wrong.

I understood that MTD says that the pv may be wrong but the first ply of the pv
is always right so it does not make sense to prune after Nc6.

Uri



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