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Subject: Re: The Answers To Our Quiz......... :-)

Author: Uri Blass

Date: 09:20:26 06/12/05

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On June 12, 2005 at 11:58:18, Uri Blass wrote:

>On June 12, 2005 at 11:39:40, William H Rogers wrote:
>
>>I may be wrong but the move is illegal to begin with. The Black King on G8 is in
>>check by the White Bishop on A2 which means that the Black King moved into check
>>which is an illegal move to start with.
>>Am I the only one who can see this?
>>Bill
>
>This is exactly the point of the test.
>Engines should detect illegal position and refuse to analyze it.
>
>Movei still does not know to do it and simply may crash in some illegal
>positions(It will not accept now positions when the king of the side not to move
>is under threat but it still can accept other problems like king that is checked
>from 2 bishops directions and I am afraid that it may crash in these cases
>because my move generator assumes no check from 2 bishop directions).
>
>Uri

If you want to get funny result try to analyze the following position with movei

K7/8/8/8/Q7/1k6/B7/8 b - - 0 1

Movei does not find capturing the queen because it assumes that the king cannot
be threatened by 2 bishop directions.

I suspect that in other cases it may lead to different funny results including
crashes.

Uri



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