Some solutions for n=4
..2..3..3..2....2..3..3..2....3..2..3..2....2..3..3..2....3..2..3..2
..3..1..2..3....3..1..2..3....2..1..2..3....3..1..1..3....2..1..2..3
..2..3..2..0....2..3..2..0....3..2..2..0....2..3..2..2....2..0..3..0
..2..0..0..0....2..0..0..3....2..3..2..0....2..0..1..0....2..1..2..3
..3..2..0..0....3..2..2..2....3..2..2..2....3..2..2..2....3..2..3..3
..2..3..2..2....2..3..2..0....2..1..0..0....3..2..0..2....3..1..3..0
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