Ed de Moel

Queens

White field Black field White field Black field White field Black field White field Black field
Black field White field Black field White field Black field White field Black field White field
White field Black field White field Black field White field Black field White field Black field
Black field White field Black field White field Black field White field Black field White field
White field Black field White field Black field White field Black field White field Black field
Black field White field Black field White field Black field White field Black field White field
White field Black field White field Black field White field Black field White field Black field
Black field White field Black field White field Black field White field Black field White field

This program solves the first years' computer science assignment to place 8 queens on a chess-board such that they don't attack one another.
Click on a field where the first one is to go, and the program will find spots for the other 7.