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Subject: Re: Does this position blow up your program? 2

Author: Drexel,Michael

Date: 03:55:26 12/26/02

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On December 26, 2002 at 06:32:31, Uri Blass wrote:

>On December 26, 2002 at 06:24:53, Drexel,Michael wrote:
>
>>On December 26, 2002 at 05:17:03, Sune Fischer wrote:
>>
>>>On December 25, 2002 at 23:23:48, Drexel,Michael wrote:
>>>
>>>>[D] Q2Q2Q1/1R6/3BR3/3k3N/2RB2Q1/5R2/Q2Q2Bp/3N3K w - - 0 1
>>>>
>>>>Problem:
>>>>White to move
>>>>If white gives check it has to be mate in one.
>>>>Find a legal position with the highest number of possible checks.
>>>>
>>>>I discovered this 5 years ago. Took me about 16 hours to find it.
>>>>I think it is possible to find a proof that it is not possible to find more:
>>>>
>>>>85 mates in one! :-)
>>>
>>>Are you sure, I "only" count 78 mates??
>>>
>>>Mates ply 0........: 0
>>>Mates ply 1........: 78
>>>Mates ply 2........: 0
>>>Mates ply 3........: 468
>>>Mates ply 4........: 0
>>>Mates ply 5........: 9538
>>>
>>>how did you count them?
>>>
>>>>I must have been crazy.
>>>
>>>Yes, you will fit right in here :)
>>>
>>>-S.
>>
>>I think I havent used calculator or computer to count them.
>>I presume simpy like that:
>>
>>Rb7 14
>
>No
>
>Rb7-b3 is not mate.
>There are  more mistakes
>Uri

Yes, 78 is correct. This is not a solution of the problem. I have checked out
other examples where Rc4 was protected first.



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