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Subject: Re: TableBase-Bug in Crafty 16.15 - Question to Bob Hyatt

Author: Steve McRiley

Date: 10:42:42 09/30/99

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On September 30, 1999 at 12:50:54, Robert Hyatt wrote:

>On September 30, 1999 at 12:13:38, Helmut Conrady wrote:
>
>>On September 30, 1999 at 10:16:24, Steve McRiley wrote:
>>
>>>On September 30, 1999 at 09:53:09, Helmut Conrady wrote:
>>>
>>>I think I´ve found a little Tablebase-Bug in Crafty 16.15. Look at this
>>>>position for example:
>>>>
>>>>wKe5, e2, d2; bKa8, d5.
>>>>
>>>>After Kd5: there is a postion with PP vs P on
>>>>the board and (with installesd tablebases!) I expected Crafty to show a
>>>>mate in several moves. But he
>>>>is calculating and calculting and shows after minutes something about
>>>>+10.
>>>>
>>>>After Kd5: he announces a correct mate. This phenomenon took place when
>>>>there is a pawn at the row next to the black pawn (Example: black f-pawn
>>>>with
>>>>white e or/and g-pawn) and the white pawn is at its beginning field.
>>>>When
>>>>you move this white pawn one or two squares above Crafty has no problem
>>>>with showing the mate.
>>>>
>>>>Is it a problem of Crafty of 16.15 or a problem belonging to Craftys
>>>>running under the Fritz GUI?
>>>>
>>>>Best wishes
>>>>
>>>>Helmut
>>>
>>>I think you should try to reinstall or something. It works perfectlly for me.
>>>Mate in #14 and Mate in #13 after Kxd5.
>>>
>>>/McRiley
>>>
>>>/McRiley
>>
>>The Problem is that Crafty have to announce a Mate BEFORE Kd5: like other
>>engines with Table base access do.
>>
>>Helmut
>
>
>I don't follow.  for it to announce a mate _before_ Kd5 you have to back up the
>position so that it has to find a move and produce a score.  It won't produce a
>score for a position until it searches...

I think that he is (and Im sure that I am) talking about the crafty.eng for the
Fritz GUI. There you put the position and then click 'infinite analysis' and its
starts ti search. I can only say that for me it works 100% and after <1s it
annonces mate in 14

/McRiley



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