Set up a chess board with all the pieces in their correct starting positions. Now remove all the Pawns. There are now four unthreatened squares on the board.

How many, and which pieces can you remove from the board so that the position and number of unthreatened squares remains unchanged?

(In reply to Solution by Joe Ruby)

You can remove both king side knights and one rook on either side.

Posted by Patrick Silver on 2005-01-02 16:57:16