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Subject: Re: Test Position Revisited

Author: Dana Turnmire

Date: 05:25:26 06/04/02

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On June 03, 2002 at 15:51:13, Roy Eassa wrote:

>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)?

I don't know if the book if right but it has supposedly been checked with
computer analysis in the second edition from which this position comes.



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