-Solves the N-Queens problem (where, in this program, N is between 5 and
-10 queens.) The problem is: how may one place N queens on an NxN
-chessboard such that no queen can attack a sister?
+Solves the N-Queens problem (where N is between 5 and 10 queens). The
+problem is: how may one place N queens on an NxN chessboard such that
+no queen can attack a sister? See also the "Endgame" screen saver.
+
+http://en.wikipedia.org/wiki/Eight_queens_puzzle