From: Dan Asimov <dasimov@earthlink.net> To: math-fun <math-fun@mailman.xmission.com> Sent: Sunday, May 10, 2009 12:09:05 PM Subject: [math-fun] Slight change in the rules of chess I'm wondering if the following potential change in the rules of chess would make sense, or if it has hidden pitfalls. Suppose one player (say Black) has a piece (say a bishop) that's pinned because if it moved, it would discover a check to Black's king. And suppose it's White's turn. Then I propose that it should be legal for White to put his own king in "check" from that bishop, since for the moment that bishop cannot really theoretically take White's king. -->>>General proposed rule: One player should be allowed to move so as to put their king in "check" from an opposing piece *if* that piece is -- for the moment -- forbidden by the rules of chess to move to the square that king is on. (Which of doesn't doesn't mean it would necessarily be a good idea to do so.) --Dan _____________________________________________________________________ If White puts his King in check, then on the next move, Black can capture the White King, and the game is over. Thus White never gets the opportunity to exploit that discovered check on Black's King. -- Gene