Author: Albert Silver
Date: 07:30:47 12/04/05
Go up one level in this thread
On December 04, 2005 at 06:54:09, Uri Blass wrote:
>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.
Maybe I'm not understanding, but a double discovered check, compared to a plain
discovered check, is nothing unusual, and is a common theme in tactics.
For example,
[D]3k4/8/8/8/8/8/3B2K1/3R4 w - - 0 1
1.Ba5+ or 1.Bg5+ lead to a double discovered check. The king being in check by
two pieces at once as a result of a discovered check. Philidor's mate is one of
the most famous examples of it in practice:
[D]5rk1/5Npp/1q6/8/2Q5/8/6K1/8 w - - 0 1
after 1.Nh6+ and a double discovered check, Black gets mated.
Albert
>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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