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