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Subject: Re: With right diagrams here (sorry) !!

Author: Sandro Necchi

Date: 06:07:31 04/25/04

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On April 25, 2004 at 09:03:38, Helmut Conrady wrote:

>On April 25, 2004 at 07:56:15, Sandro Necchi wrote:
>
>>On April 25, 2004 at 07:55:09, Jorge Pichard wrote:
>>
>>>On April 25, 2004 at 06:53:39, Eduard Nemeth wrote:
>>>
>>>>On April 25, 2004 at 06:47:21, Eduard Nemeth wrote:
>>>>
>>>>No Jorge, see here:
>>>>
>>>>
>>>>Ruffian 2.1.0 - Shredder, real position:
>>>>
>>>>
>>>>[D]6Q1/8/p7/7p/8/5q2/5k2/2K5 w - - 0 1
>>>>
>>>>Is this won with 6-Pieces?  I believe no
>>>>then the pawn on a6 is not possible in the endgame
>>>>
>>>>(Ruffian 2.1.0 has not 6 pieces, but Shredder have it).
>>>>
>>>>Position without pawn a5:
>>>>
>>>>[D]6Q1/8/8/7p/8/5q2/5k2/2K5 w - - 0 63
>>>>
>>>>
>>>>Draw:
>>>>
>>>>1. = (0.00): 63.Dd8
>>>>2. -+ (-#76): 63.Da2+
>>>>
>>>>But Ruffian (without 6-Pieces) plays Qa2+? and lost. :(
>>>>
>>>>Here won also not the engine, it won the better EGTB, or? :)
>>>
>>>But the engine has to reach that position before it can use the EGTB, therefore,
>>>the game was won after reaching that position with or without 6-Pieces EGTB.
>>>
>>>Jorge
>>
>>Correct!
>>
>>Sandro
>
>Eduard is right IMO. In a tablebase-based search the tablebases can help to
>reach a won position, which the engine may be couldn`t find alone.
>
>I would argue in an other way: every programmar is free to use as much
>tablebases as he wants ...
>
>
>Helmut

I agree with Eduard, but in this specific position the program is able to see
the win also without 6 EGTB.

I know it because I do not have them and I saw the program evaluation on one of
my computers.

Sandro



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