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Subject: Re: Rook & Pawn Ending with Perpetual Check and Stalemate

Author: Dieter Buerssner

Date: 16:55:23 03/31/01

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On March 31, 2001 at 14:57:27, Frank Schneider wrote:

>On March 31, 2001 at 09:22:57, Ferdinand S. Mosca wrote:
>
>>Hi everyone,
>>
>>A position from an actual game which caught my interest while
>>playing an engine match at G60.
>>
>> 3r4/5k2/5p2/6pp/5p2/1p6/p2R4/K3R3 b - - 0 1
>>Is there any program that can evaluate this simple ending logically.
>>
>>The trap here is the move ...Rxd2, this may not win but it only draws.
>>There is perpetual check and stalemate if black plays ...Rxd2. Many programs
>>probably find the perpetual coming, but at what time do your favorite programs
>>give a 0.0 or near 0.0 score?
>
>Gromit 3.8.2 avoids Rxd2 after <1sec and prefers Rb8.

Frank, this really is impressive. If you would like to enlighten us, how you can
achieve this with Gromit, I am certain, that you will have very attentive
listeners :-)

-- Dieter



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