n=4的一些解决方案:
..0..0..0..0....0..0..0..0....1..0..0..0....0..0..0..0....0..1..0..0
..0..0..0..0....1..0..0..1....0..0..0..0....0..0..0..0....0..0..0..1
..0..0..0..1....0..0..0..0....0..0..0..1....0..0..0..1....0..0..0..0
..0..0..0..0....0..0..0..0....0..0..0..0....1..0..0..0....0..0..1..0
..0..0..0..0....0..1..0..0....1..0..0..0....0..0..1..0....0..0..0..0
..0..1..0..0....0..0..0..0....0..0..0..0....0..0..0..1....0..0..0..1