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