i am taking a java programming class in college and one of the bonus questions was to write a program that solves the 8 queens puzzle. I had never heard of that before and I found it interesting. I was wondering how many people on here have done that puzzle?\

For those that don't know the puzzle, you have to take 8 queens and place them on a chessboard in such a way that none of them are attacking each other.

We did this long back.. very interesting as there are no of solutions for each starting position of first Queen.. Principle is that Qs are seperated by N distance (as we called it)  i.e. a position N can go to in one step..

I used to give it as an extra assignment to my chess students. Some of them occasionally got it.