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Subject: Re: Nolot #8

Author: Vincent Diepeveen

Date: 03:27:06 01/18/00

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On January 17, 2000 at 16:08:04, Jeremiah Penery wrote:

>On January 17, 2000 at 14:39:35, Vincent Diepeveen wrote:
>
>>On January 17, 2000 at 14:32:28, Dann Corbit wrote:
>>
>>>I see that there are programs that can solve NOLOT #8.
>>
>>Ferret.
>>
>>>I also understand that that position was shown to be in error.
>>
>>No that's a big lie.
>
>What are you talking about??
>The given analysis _was_ in error.  3. ...gxf6 is not the best move, as you even
>pointed out.

gxf6 is THE PROBLEM to see for programs.
if a program doesn't need to consider gxf6 then it finds at say 7 ply
or something the Bxh7 move.

>>>My question is, do the solutions find the original solution or the corrected
>>>one?
>>
>>All diep versions so far didn't find the critical line.
>>there is nothing 'corrected'.
>
>I think you should check your facts before blurting out things like this.

Please try to understand how a chessprogram works.

>>You need to see a deep line starting with:
>>  Bxh7+ Kxh7 Qh5+ Kg8 Rd4 gxf6 Rg4+ Bg7 Qh6 Kf8 Rxg7 etcetera.
>>
>>However AFTER your program sees this is big trouble, then it will
>>select Bxh7 as best move and play:
>>  Bxh7+ Kxh7 Qh5+ Kg8 Rd4 bf3 , so giving back the piece directly.
>>
>>Bf3 is simply best move there, but you need to see the consequences of gxf6
>>before you play Bf3.
>>
>>So we see a difference between the objective best line, and what you
>>need to see to play it. That's very common in positions where a threat is
>>there.
>>
>>Vincent



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