n=5的一些解决方案:
..3..2....2..0....1..0....2..3....3..2....3..2....1..0....1..2....2..0....2..1
..2..1....0..3....0..1....1..2....2..1....2..1....2..1....2..0....1..3....0..2
..0..2....2..1....2..3....3..0....1..3....0..3....0..3....1..3....3..1....1..3
..2..0....1..3....0..1....2..3....2..0....3..0....3..2....2..0....1..3....0..1
..0..3....0..1....2..3....0..1....0..1....0..2....0..3....3..2....0..1....1..3
..3..0....3..0....3..2....1..0....3..0....1..3....3..0....2..1....1..3....2..1