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davidzeutzius
16-11-2007, 04:09 AM
Can a pinned Bishop be used as backup for mate? Thanks much. Was looking at the advanced Shredder Chess puzzle of the day.

:doh:

Garrett
16-11-2007, 06:13 AM
Yes.

I am guessing you mean that a pinned bishop is supporting a queen which is delivering the mate, or the bishop controls some escape squares (but is not delivering the check as then it could be captured (unless the piece pinning it is also pinned against its own king).

davidzeutzius
16-11-2007, 06:55 AM
Thanks, that's exactly what I needed to know. have a great day!!

Ian Rout
16-11-2007, 10:14 AM
In fact it's more general than that - whether mate or not, a pinned piece controls squares and precludes the opposing King from entering those squares. Similarly if a pinned piece attacks the opposing King then that King is in check.

Capablanca-Fan
16-11-2007, 11:23 AM
Article 3:9 of the FIDE Laws of Chess (http://www.fide.com/official/handbook.asp?level=EE101):

The king is said to be “in check” if it is attacked by one or more of the opponent’s pieces, even if such pieces are constrained from moving to that square because they would then leave or place their own king in check. No piece can be moved that will either expose the king of the same colour to check or leave that king in check.

Kevin Bonham
16-11-2007, 11:31 AM
A piece can even move into a pin and deliver checkmate itself in the process, provided the piece pinning it is also pinned!

Intuition
16-11-2007, 11:47 AM
A piece can even move into a pin and deliver checkmate itself in the process, provided the piece pinning it is also pinned!

It seems KB has been reading his Reinfeld :) ....1001 sacs and combos has a few nice combos like that from what i can remember

Capablanca-Fan
16-11-2007, 02:05 PM
A piece can even move into a pin and deliver checkmate itself in the process, provided the piece pinning it is also pinned!
1. Ra8+ Qg8+ 2. Bg7#

Basil
16-11-2007, 04:26 PM
A piece can even move into a pin and deliver checkmate itself in the process, provided the piece pinning it is also pinned!
Or if there is a double check in play.

Capablanca-Fan
16-11-2007, 06:38 PM
Of there is a double check in play.
Like this?

1. ... Qg8+?? 2. Bg7#

ElevatorEscapee
16-11-2007, 11:06 PM
Irrelevant to the question, but one can also play "castles kingside" (mate), "castles queenside" (mate) and even "pawn takes pawn en passant" (mate). :)

Basil
16-11-2007, 11:42 PM
Like this?

Ohhhh! Yes_mmm_looks painful_mmm! Who's a silly billy_mmm? Ohhh!

http://i4.photobucket.com/albums/y105/scene66/avatars/crawford.jpg