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Subject: Re: If you like to solve a mate...

Author: Uri Blass

Date: 09:40:22 02/03/01

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On February 03, 2001 at 09:12:26, Pete Melissakis wrote:

>I had a position exactly like this in one of my games just last week.
>Don't remember how it turned out.
>
>Pete  .. Ô¿Ô

What is the name of the game that you played?
The position is illegal so it is impossible that you played chess.

Ô¿Ô


The reason that I say that the position is illegal is the fact that black played
3 captured in the game when white did not capture.

Black can get at most 6 passed pawns by 3  captures but black promoted 8 pawns
to 4 bishops,2 rooks and 2 queens.

Conclusion:this position cannot be obtained from the initial position in a chess
game.



The reason that black can create at most 6 black passed pawn by 3 captures:

I define a good pawn as a passed pawn or a pawn that in the same file as another
pawn.

Every passed pawn is a good pawn so it is enough to prove that black can
generate at most 6 good black pawns by 3 captures.

Black can get at most 2 good black pawns by every capture because if the capture
is by a piece at most one good black pawn is created and if the capture is by a
pawn at most 2 good black pawns are created if the capture leads to 2 pawns at
the same file.

Uri



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