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Subject: Re: Test position (perpetual check)

Author: Dennis Breuker

Date: 02:52:23 07/01/05

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On June 30, 2005 at 16:42:56, John Merlino wrote:

>On June 30, 2005 at 15:57:25, Zappa wrote:
>
>>On June 30, 2005 at 15:21:48, Dennis Breuker wrote:
>>
>>>This is a nice test position (analysis from one of my own games).
>>>
>>>[D] 1k1r4/5p1p/BpQ1np2/3pp3/1P1q4/P7/3K4/R7 w - -
>>>
>>>White is threatening mate in one.
>>>Black can't do anything about it.
>>>
>>>What do your programs do?
>>>Do they play the losing Kc2, letting Black exchange Queens?
>>>
>>>Or do they play the drawing move Ke1!, sacrificing the rook with check.
>>>After Ke1, the resulting position is a draw, since Black has to give
>>>a perpetual check (otherwise White mates).
>>>
>>>Dennis
>>
>>How does white draw after 1. Ke1 Qxa1+ 2. Kd2 Qd4+ 3. Ke1 Qe4+ 4. Kd1 Rd7 5.
>>Qxd7 d4 ?
>>
>>anthony
>
>Exactly. If Black can make check on the a8-h1 diagonal, then play d4 -- problem
>solved.
>
>jm

Hmm...

It seems you are right. :(
Okay, so this is not a good test position, and the computer saw
more than I thought.

How can it be that I still underestimate these monsters? :)

Sorry to have wasted your time.
Dennis



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