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