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Subject: Re: Misevaluation in endgame by Gambit Tiger 1.0

Author: Sune Larsson

Date: 00:39:05 02/12/01

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On February 11, 2001 at 22:13:00, Robert Hyatt wrote:

>On February 11, 2001 at 18:23:01, Uri Blass wrote:
>
>>On February 11, 2001 at 18:10:33, Robert Hyatt wrote:
>>
>>>On February 11, 2001 at 12:24:21, Vincent Lejeune wrote:
>>>
>>>>in this position :
>>>>
>>>>[d]k7/p7/1p6/3p4/3K1B2/r7/8/4R3 w - - 0 1
>>>>
>>>>Gambit Tiger 1.0 gives +2.14 for white , I think it's a big overevaluation for
>>>>white !
>>>>
>>>>
>>>
>>>
>>>It's a common enough error.  In reality if anybody wins, black wins. White
>>>has no winning chances at all.
>>
>>
>>I disagree.
>>
>>In a game between humans white has chances because he has chances to capture all
>>the black pawns and win the KRB vs KR endgame.
>>
>>In a game between computers white has also chances if the defender does not use
>>the KRB vs KR tablebases.
>>
>>It is a draw but I prefer white because white captures one pawn and is not going
>>to lose with Rook and bishop against Rook and 2 pawns beacause the pawns are at
>>a7 and b6 and the king is in the middle of the board so it is easy for white to
>>prevent the pawns to get forward.
>>
>>Black practically may lose by the following steps:
>>1)losing the pawns
>>2)not finding the right moves in KR vs KRB endgame.
>>
>>Uri
>
>
>Black can also drop dead and his flag will fall.  :)
>
>Otherwise I can't imagine black losing this.  Drawing KRB vs KR is _not_
>a difficult task.

 For humans it's a tricky ending. I've seen several players, rated above ELO
 2400, lose this KR vs KRB. And that under serious tournament conditions.
 Guess you have to know it thoroughly. I, for sure, don't.

 Sune



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