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Subject: Re: Nice end-game problem; here is another phenomenon, who can explain?

Author: Bernhard Bauer

Date: 05:00:18 04/27/99

Go up one level in this thread


On April 27, 1999 at 07:34:23, Harald Faber wrote:

>On April 27, 1999 at 07:03:42, Bernhard Bauer wrote:
>
>>>>Yes, I did. I also enjoyed this problem:
>>>>
>>>>qnb5/1p1kBK2/pPp5/P1p5/2P5/8/8/8 b - - 0 0
>>>>
>>>>White to move and win. It SHOULD be an easy one, only move#2 and the motive must
>>>>be found.
>
>Hmm, here seem to be mixed up some things...
>In the FEN above it is correct, BLACK to move.
>
>>>>What amazes me is that Crafty and Fritz5.32 with their deepest search depth
>>>>don't find the final winning move in move#19 pv. They have only a draw eval
>>>
>>
>>It's white to move, so the FEN should be
>>qnb5/1p1kBK2/pPp5/P1p5/2P5/8/8/8 w
>
>No, not in this position.
>Again, now the correct position where Crafty and Fritz only see Be5 as best move
>while Be7 easily wins:
>
>qnb5/1p1k1K2/pPp2B2/P1p5/2P5/8/8/8 b - -

May be I'm sitting on the wire. -:)
The above FEN position looks as follows:


       +---+---+---+---+---+---+---+---+
    8  | *Q| *N| *B|   |   |   |   |   |
       +---+---+---+---+---+---+---+---+
    7  |   | *P|   | *K| B | K |   |   |
       +---+---+---+---+---+---+---+---+
    6  | *P| P | *P|   |   |   |   |   |
       +---+---+---+---+---+---+---+---+
    5  | P |   | *P|   |   |   |   |   |
       +---+---+---+---+---+---+---+---+
    4  |   |   | P |   |   |   |   |   |
       +---+---+---+---+---+---+---+---+
    3  |   |   |   |   |   |   |   |   |
       +---+---+---+---+---+---+---+---+
    2  |   |   |   |   |   |   |   |   |
       +---+---+---+---+---+---+---+---+
    1  |   |   |   |   |   |   |   |   |
       +---+---+---+---+---+---+---+---+
         a   b   c   d   e   f   g   h

How can a black bishop move to e5 or e7 in this position?
I see only one black bishob on c8. This bishop can not move anywhere.
Can you enlighten me please?

Kind regards
Bernhard



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