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Subject: Re: shortest mate test position that programs cannot find

Author: Uri Blass

Date: 01:12:37 07/20/02

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On July 19, 2002 at 23:07:20, allan johnson wrote:

>On July 19, 2002 at 23:05:58, David Dahlem wrote:
>
>>On July 19, 2002 at 21:23:19, K. Burcham wrote:
>>
>>>
>>>
>>>what is the shortest "mate in x moves" position that you know of that programs
>>>have a diffcult time finding or cannot find at all? Please, not e4.
>>>
>>>will you please post the position?
>>>kburcham
>>
>>I tested some programs on this mate in 1 and some didn't see it. I don't
>>remember now which engines couldn't find it.
>>[D]5K2/8/2qk4/2nPp3/3r4/6B1/B7/3R4 w - e6 0 1
>>Regards
>>Dave

I think that this is not the fair way to test

You should give programs the following position

[D]5K2/4p3/2qk4/2nP4/3r4/6B1/B7/3R4 b - - 0 1

play e5 and see if they cannot see the mate in 1.

In other case you use a bug that programs do not
support Fen correctly.

My latest Movei still ignores the en passant in supporting Fen
so it is unfair to say that it cannot see the mate in 1.

Uri



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