Arrange all 8 chess pieces of one set (no pawns) on a 5x6 board so no piece attacks another. Never mind that they're all the same color--it's "friendly fire". Be sure that the two bishops are on opposite-colored squares. There are 6 ways, not counting reflections and rotations.

(In reply to What's a rotation? by rhino)

That's a rotation.

 

Posted by Charlie on 2004-03-05 14:15:47