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