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.

Wow, I just found this problem and I'm surprised no one has solved it yet. I found a couple of solutions just by trying things on paper:

· · B N ·
Q · · · ·
· · · K ·
· R · · ·
· · · · R
· · B N ·

· · N · N
· · · R ·
R · · · ·
· · K · B
· · · · B
· Q · · ·

I'll write a little program to find the other ones, when I get the time.
I haven't looked at the submitted solution yet, but knowing Charlie, he probably already has one. Let's see if we use the same algorithm..

Posted by DJ on 2003-08-27 23:20:24