对于某些解决方案,n=4:
..0..3..0….0..3..0….0..0..0..0..0..0..0..0..0..0..3..0….0..1..0
..3..0..0….0..0..3….3..0..3….0..0..0….1..3..0….3..3….0..3..0..0..0..0
..0..0..3….3..0..0..0..0..0..0..0..0..0..0..3..0..0..3..0..3..0..3..0..3..0..3..0..3..0
..0..3..0….0..3..0….0..0..0..0..0..0..0..0..0..1..0….0..3..0..0..0..0
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