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Subject: Re: forward pruning for underpromotions

Author: Steffen Jakob

Date: 01:56:26 09/21/99

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Hi Christophe!

On September 21, 1999 at 00:48:56, Christophe Theron wrote:

>On September 20, 1999 at 02:09:30, Steffen Jakob wrote:
>
>>Hi all!
>>
>>I still try to improve the playing skill of Hossa in pawn endgames (which is not
>>very difficult because he plays them very badly). About underpromotions: I know
>>that Amir Ban doesn't generate underpromotions in the search tree. I don't like
>>that very much.
>
>Yes. I think Amir is right, but you know there are always people out there that
>have nothing better to do than complain about it. They start making noise about
>it on CCC, and after several days everybody else is talking about it: "what,
>this program does not find underpromotion problems?! What a shame!"...

It's ok for me if he does it and lives with some minor problems because of this
because he has good reasons.

>You'd better save yourself this kind of (stupid) trouble by generating
>underpromotions!

>>What I am doing now is to reduce the search depth for
>>underpromotions (one ply). It helps a lot in some positions, e.g. in the pawn
>>endgame position where crafty saw that mate in 4 although it is a mate in 6.

>Yeah! That's one of the cool ideas I read here from time to time, and that makes
>me believe this place is worth it (not to mention the pleasure to talk with
>several friends).

I am glad that you like this idea :-)

Best wishes,
Steffen.



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