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