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Subject: Re: How long to find the winning move?

Author: Roy Eassa

Date: 12:31:39 01/14/02

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What you said below is the reason I think the second position you posted is such
a great puzzle for people as well as computers.  Forget about the first position
-- it's too easy and intuitive.  The second position is a great new chess puzzle
that you can claim to have composed!



On January 12, 2002 at 21:20:30, Brian Katz wrote:

>>>[D]8/5p2/1kp5/p1p5/P1PpKPPp/1P5P/8/8 b - - 0 1
>With the Black King on the b- file, it seems that the best Black can achieve is
>a won Queen vs. Pawn ending. However, with Black King on the c-file or closer,
>Black wins very easily, and the programs find the winning 1...f5+ very fast.
>Fritz 7 doesn't select 1...f5+ right away when the Black King is on b6. It takes
>a good number of minutes before it realizes that it is winning. Deep Fritz and
>Fritz 6 find the move as winning much faster than Fritz 7a. This is on a  350
>MHz Pent ll.
>I find the position to be fascinating. With the Black King on g7, I found the
>win quite fast during the game that I had played. It really is a pretty simple
>position. CRITICAL SQUARES is what it is all about. The position is pretty
>straight forward. However, with the Black King on b6, it does seem like it is
>way out of the game. Imagine your opponent face in a position like that,
>thinking the worst he could get as White would be a draw. AND THEN!! suddenly
>1...f5+ !!!!!



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