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Subject: Re: Try this position with Shredder 9.1 UCI

Author: Robert Hyatt

Date: 12:54:16 10/24/05

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On October 24, 2005 at 15:26:12, Helmut Conrady wrote:

>On October 24, 2005 at 13:46:43, Kurt Utzinger wrote:
>
>>On October 24, 2005 at 11:50:14, Helmut Conrady wrote:
>>
>>>On October 24, 2005 at 09:55:40, Kurt Utzinger wrote:
>>>
>>>>On October 24, 2005 at 09:51:01, Jouni Uski wrote:
>>>>
>>>>>[D]N7/PPPPPPPP/K1k3qB/brpnn3/7N/6rb/8/8 w - -
>>>>>
>>>>>I don't know if it's legal (from old CSS magazine).
>>>>>
>>>>>Jouni
>>>>
>>>>      This position is of no practical interest
>>>>      and therefore (for me) not worth testing.
>>>>      It's also an illegal (impossible) position.
>>>>      Regards
>>>>      Kurt
>>>
>>>I think, the position is legal. What arguments do you have for opinion, Kurt?
>>>
>>>Helmut
>>
>>      Hi Helmut
>>      I consider all positions which can under no
>>      circumstances happen in a game as illegal.
>>      Of course: I don't have studied the FIDE
>>      rules to come to this conclusion :-)
>>      Regards
>>      Kurt
>
>Again: Why can this position under *no circumstances* happen in a game?
>
>Helmut

nobody in their right mind would advance all pawns to the 7th prior to promoting
one or more of 'em.  :)

I believe it is an illegal position because the black pawn is impossible.  How
did it get through the line of white pawns?  Only way is to make a capture
through the white pawn line as they advance.  But what did it capture, since all
white pawns and pieces are still on the board, if my eyes are working.

Hence completely impossible to reach from the starting position, playing only
legal moves...



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