6X4的一些解决方案
..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0
..0...0...0...0...0...0...0...0...0...0...0...0...0...0...0...0...0...0...0...0...0...0...0
..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0
..2..1..2..0....0..0..0..0....0..1..0..2....2..0..0..0....0..0..2..0
..1..0..1..1....1..0..1..2....0..2..0..2....1..1..1..1....0..1..2..1
..2..0..2..2....1..2..0..1....0..1..0..1....2..1..1..0....0..1..1..1
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