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