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Subject: Re: If you like to solve average mate position...

Author: Paul

Date: 12:37:29 01/25/01

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On January 25, 2001 at 15:24:40, Heiner Marxen wrote:

>On January 25, 2001 at 11:13:10, leonid wrote:
>
>>On January 25, 2001 at 10:57:06, José Antônio Fabiano Mendes wrote:
>>
>>>On January 25, 2001 at 09:57:29, leonid wrote:
>>>
>>>>Hi!
>>>>
>>>>If you like to solve some average mate position...
>>>>
>>>>[D]R1brkrnR/1N1qqqbN/3qqq1B/1B1bQNbQ/1bn1Q2B/3Q1Q2/3Q1Q2/1K6 w - -
>>>>
>>>>Please indicate your result.
>>>>
>>>>If you can depose here just one forced mate position from some world chess
>>>>championship, it will be nice. Indicate exactly where this competition happened.
>>>>I speak about championship where human found forced mate. Never mind if this
>>>>championship was between two humans or man and machine. It could give an
>>>>opportinity to see which program is best in real life situation. Even more that
>>>>this, it will permit to tune selective search for forced mate to make it more
>>>>effective.
>>>>
>>>>Thanks,
>>>>Leonid.
>>>
>>>  As written the second row [1N1qqqb] accounts for only 7 squares,
>>>  that's why the diagram is not displayed. JAFM
>>
>>Thanks for indicating mistake! I hope that now it will come in graphics. At list
>>this time I will look if it is really there.
>>
>>Leonid.
>
>According to Chest there is no mate in 8 moves (41.6 min, K7/600 350MB hash).
>What depth is expected for a solution?
>
>Ahem, what exactly is so "average" about this position?
>
>Heiner

Hi Heiner!

I found a mate in 10 sofar:

1. Nxf6+ B7xf6 2. Nbxd6+ Bxd6 3. Qxf7+ Q7xf7 4. Qxe6+ Bxe6 5. Ng7+ Bxg7 6. Qxf7+
Rxf7 7. Qxe6+ Kf8 8. Bxg7+ Kxg7 9. Qh7+ Kf8 10. Rxg8x

Can run it again to check if there is a mate in 9 ...

Paul




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