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

Author: blass uri

Date: 02:34:41 04/28/99

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On April 28, 1999 at 05:04:14, Harald Faber wrote:

>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.

The engine has Be7 if you give it only the ginal position and not all the game

Uri



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