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Subject: Re: Eureka! Voila! Ooh La La! (Thanks Uri!)

Author: Uri Blass

Date: 03:54:09 12/04/05

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On December 04, 2005 at 06:43:01, Reinhard Scharnagl wrote:

>On December 04, 2005 at 06:35:35, Uri Blass wrote:
>
>>I do not know about double checks when a piece that moved does not give check.
>
>Hi Uri,
>
>[D]8/8/3k4/2pP4/8/B2R4/4K3/8 w - c6 0 1
>
>I just composed that. Watch the Pawn e.p. capture move.
>
>Reinhard.

Hi Reinhard,
Thanks I see it now.

It seems that enpassent is the only case that it can happen and it can only
happen from rook a1-a8 direction and diagnol direction.
I thought about enpassent capture earlier but not about this example but about
checks from h5-a5 direction.

Fortunately this example does not lead to a bug in movei.
I had in the past a bug when I assumed that checks cannot be done from 2 rook
directions but calculating the direction of checks after a move is not done
based on the previous move.

Uri



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