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Subject: Re: KR against KQ is draw without tablebases

Author: José de Jesús García Ruvalcaba

Date: 13:38:54 01/27/03

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On January 27, 2003 at 16:15:32, Daniel Clausen wrote:

>On January 27, 2003 at 16:00:40, José de Jesús García Ruvalcaba wrote:
>
>>On January 27, 2003 at 12:42:09, Daniel Clausen wrote:
>>
>>>On January 27, 2003 at 12:35:50, Georg Langrath wrote:
>>>
>>>>I tried to let Chessmaster 9000 play against itself in endgame KRKQ. The side
>>>>KR with tablebases and the side  KQ without. KQ-side wasn?t nearer checkmate in
>>>>move 50 than in move 1, even with 3 minutes per move.  It is rather amusing to
>>>>look at. I think that it is impossible for a computer to solve without special
>>>>knowledge or tablebases as in the case KBNK.
>>>>Georg
>>>
>>>Now do the experiment again but let a strong human play for the KQ-side and see
>>>whether the result is any different. ;)
>>>
>>>Sargon
>>
>>A strong player will win this ending after the second or third try if he has not
>>practised before. It is not really difficult, even a weak player like I can win
>>against a computer with tablebases after some practise.
>>José.
>
>Wasn't there this experiment with some GMs who failed to win when they played
>against the TBs?

Yes, it was this. GM Walter Browne could not win against Belle. But he tried
again after a few days and won quite easily. I think he could have won the same
day (after a few tries) if he were not so shocked.
José.

>Or am I mixing this with another endgame?
>
>Sargon



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