针对4 X 3的一些解决方案:
..0..0..1....1..1..1....0..0..0....0..0..1....0..0..0....0..1..1....0..1..1
..0..1..0....1..1..1....0..0..1....0..1..0....0..0..0....1..0..1....1..0..1
..1..0..1....1..1..1....0..1..0....0..1..1....0..0..0....1..0..1....1..0..1
..1..1..1....1..1..1....0..1..0....1..1..0....0..0..0....1..1..0....1..1..1
...
...1..2.......4..4.......0..1.......1..2.......0..0.......2..3.......2..3...
...2..2.......4..4.......1..2.......2..3.......0..0.......2..2.......2..2...
...3..3.......4..4.......2..2.......3..3.......0..0.......3..2.......3..3...