n=6的一些解决方案:
..3....3....2....0....0....0....2....0....3....0....1....0....0....1....2....3
..2....1....2....3....3....2....1....3....3....2....2....2....1....3....1....1
..3....2....3....0....1....3....3....0....1....0....3....0....0....0....3....0
..0....3....3....1....0....0....0....3....0....3....1....2....3....0....1....3
..1....0....0....3....2....0....0....1....0....0....3....1....2....3....3....3
..0....0....0....0....3....2....3....3....2....3....0....2....0....1....0....0
..2....2....2....2....0....1....1....2....2....2....0....0....3....0....0....1
..3....1....1....3....3....3....2....0....0....0....3....2....0....2....1....2
..0....3....2....0....0....1....3....1....0....3....1....1....3....3....2....0