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Subject: Re: If you like to crush easy mate...

Author: Heiner Marxen

Date: 08:17:19 02/10/01

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On February 10, 2001 at 10:36:39, leonid wrote:

>On February 10, 2001 at 08:23:58, Uri Blass wrote:
>
>>On February 10, 2001 at 07:42:35, leonid wrote:
>>
>>>Hi!
>>>
>>>If you like to solve a mate, try this one:
>>>
>>>[D]3R2K1/q3q1B1/2bQ3Q/QQ3NQ1/2NnQQB1/Qq1qq1nQ/2nqr3/2nkbRq1 w - -
>>>
>>>Please, indicate your result.
>>>
>>>Thanks,
>>>Leonid.
>>
>>easy?
>
>When I found this position, yesterday, it was solved by selective search 9 moves
>deep. I expect that shortest mate is even closer. Move that lead to mate is
>checking move. This is why I wrote "easy".
>
>Leonid.

There is no mate in 8 according to Chest (55 mins K7/600, 350MB hash).


>>I am interested to know how much time do humans need to solve it.
>
>>Please indicate your result,the tree that you generated to prove the mate and
>>your time.
>>
>>I am not going to do it because I am too lazy but I can give you a hint that it
>>is a mate in at most 9 moves so you do not need to search longer lines
>>
>>Uri

I stared at it for some minutes, myself.  I did like Nb2+ until I found
that the knight at c4 is pinned!  Uuuh.  That's computer stuff  ;-)

Heiner



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