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

Author: leonid

Date: 13:19:40 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?

Hi, Heiner! I saw that this position could be solved with 11 moves or well
below. Paul already said 10 moves as new maximum. You said that in 8, no mate
for sure.

Position was average in my mind since it was not that endless position of 20 or
30 moves deep, like I have seen here already few times. Number of initial legal
moves from each side is moderate. Only white side reach slightly over 100 moves.
 Black have only few responses after initiation of hostilities.

Leonid.

>Heiner



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