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