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Subject: Re: Nice position to test the selective search

Author: blass uri

Date: 03:47:14 12/27/99

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On December 26, 1999 at 19:46:55, Vincent Diepeveen wrote:

>On December 26, 1999 at 17:10:51, Ernst Walet wrote:
>
>>On December 26, 1999 at 16:25:48, James Robertson wrote:
>>
>>>On December 26, 1999 at 15:51:06, Ernst Walet wrote:
>>>
>>>>Going through some EPD collections I´ve found an interresting position, once
>>>>posted by Ed Schroder.  I tested Shredder3, Hiarcs 7.32 and Nimzo 99 with it.
>>>>Nimzo was the only one who was able to see the danger in tournament time.
>>>>Hiarcs and Shredder did not see it within a hour.  Used machine PIII-450 with
>>>>64MB hash.  How are Shredder 4 and Junior 6 doing here?
>>>>
>>>>Ernst-J.
>>>
>>>Perhaps you should post the position....?
>>>
>>>James
>>
>>
>>Oh boy, clumsy me.  Here it is.
>>
>>6k1/p3b1np/6pr/6P1/1B2p2Q/K7/7P/8 w - -  am Qxh6
>>
>>Ernst-J.
>
>With cleaned hashtables diep needs 4:43 to see black getting a queen
>(so to get a fail low for Qxh6??). That's pretty long actucally, but
>i guess that no matter how high you evaluate a passer, you only see this
>position when you see it queen.

Crafty17.04 can see a draw evaluation for Qxh6 at depth 13 and avoid Qxh6 in few
minutes at depth 13.(hardware pentiumIII-450)

Uri



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