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