There is no search solution to N-queens, so any code doing search is poor and wasteful. I am not going to spoil the fun by giving you the details here, just th

There is no search solution to N-queens, so any code doing search is poor and wasteful. I am not going to spoil the fun by giving you the details here, just the hint: start on the right square, depending on whether N is even or odd. Then place successive queens in a knight jump pattern. It is fascinating to me that whoever invented chess a long time ago may have been aware of these subtle complementary relationships between the different types of moves?