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Subject: Re: Test Position Revisited

Author: Roy Eassa

Date: 12:51:13 06/03/02

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On June 02, 2002 at 22:32:25, Dana Turnmire wrote:

>--  --  --  --  --  --  --  --
>--  --  --  --  --  --  --  --
>--  --  --  --  --  --  BK  --
>--  --  BP  --  BP  --  --  --
>--  --  WP  --  WP  --  WK  --
>--  --  --  WN  --  --  --  --
>--  --  --  --  --  --  --  --
>BB  --  --  --  --  --  --  --
>
>Here is the test position found in "The Mammouth Book of Chess."
>
>1Nxc5?
>
>This obvious, materialistic move throws away the win.  White's c-pawn cannot be
>advanced to the queening square without the help of the king, but this allows
>Black to counter by attacking the e-pawn.  White should not take the c-pawn, but
>instead make progress on the kingside by manoeuvring his knight.
>
>I tested Chess Genius 3 and after almost 8 hours it still did not avoid the
>losing move.  Can any of the modern programs avoid the losing move?  If not
>would endgame tablebases help?


[d] 8/8/6k1/2p1p3/2P1P1K1/3N4/8/b7 w - - 0 1

Are we sure the book is right?  What would be an example of a better variation
(one that really does win)?



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