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