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

Author: Harald Faber

Date: 02:04:14 04/28/99

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On April 27, 1999 at 13:25:15, Jeremiah Penery wrote:

>>>
>>>       +---+---+---+---+---+---+---+---+
>>>    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
>>
>>Argh! Amazing what can go wrong...put the WHITE BISHOP back to f6 and then WHITE
>>TO MOVE. Now Be7 wins while Crafty and Fritz, well, you know what...
>
>Here is my output (WITH nullmove - I have not changed anything about nullmove in
>the code)
>8->   0.17   7.14   1. Be7 Qa7 2. bxa7 Kc7 3. a8=Q Nd7
>                    4. Kg7 Ne5
>9     0.18     --   1. Be7
>9     0.22     ++   1. Be7!!
>9     0.57  Mat06   1. Be7 Qa7 2. bxa7 Kc7 3. Bd6+ Kxd6
>                    4. axb8=Q+ Kd7 5. Qe5 b5 6. Qe7#
>9->   0.58  Mat06   1. Be7 Qa7 2. bxa7 Kc7 3. Bd6+ Kxd6
>                    4. axb8=Q+ Kd7 5. Qe5 b5 6. Qe7#
>
>Jeremiah

Hmm. So is there a difference between the Fritz-engine and the "normal" Crafty?!
The engine has Be5.



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