Doug Chatham wrote on Wed, Mar 7, 2012 12:22 PM UTC:
Article 3, section 9 of the FIDE Laws of Chess:
3.9Â Â Â Â Â Â Â Â
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.
3.9Â Â Â Â Â Â Â Â 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.