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Subject: Re: OopS! I was wrong.

Author: José de Jesús García Ruvalcaba

Date: 09:19:44 12/20/00

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On December 20, 2000 at 12:17:30, José de Jesús García Ruvalcaba wrote:

>On December 19, 2000 at 14:42:18, Laurence Chen wrote:
>
>>On December 19, 2000 at 04:30:31, Harald Faber wrote:
>>
>>>[D]8/6KP/2r1k3/8/p7/P7/1P5P/8 b - - 0 0
>>>
>>>Test your progs with and without TBs. Which prog needs how long to see that this
>>>is not a draw but black wins?
>>What if White decides to move his King back and forth between g7 and g8, how can
>>Black force the win?
>>I do not see that Black can force a win. For example: 1. ... Rc7+ 2. Kg8
>
>2... Kf6 3. h8=Q+ Kg6 wins. Or 3. h8=N Rg7+.
>
>>Rc8+ 3.
>>Kg7 Rc7+ 4 Rg8 Rc8+ 5. Kg7 Rc7+ 6. Kg8 draw by 3 fold repetition. or 1. ... Rc7+
>>2. Kg8 Rc2 3. h8(Q) Rc8+ 4. Kg7 Rxh8 5. Kxh8 Kf7 6. K moves and White does not
>>need to move any of the pawns.  How can Black win then? What is it that I am
>>missing?
>
>Yes, you are missing 2... Kf6! It seems that Jeremiah posted another winning
>line.
>

Sorry, it is obvious that 3. Qh3 refutes Kf6. That happens to me when I try to
analyze directly at the computer screen (I need a real chess set!).

>>Regards,
>>Laurence
>
>José.



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