Some solutions for n=4
.....1........2........0........0........0........0........0........0
....2.0......0.2......0.2......3.2......2.0......1.1......2.0......1.4
...3.1.0....1.0.0....0.1.4....1.1.0....3.0.1....2.0.0....1.4.0....1.0.1
..0.2.1.0..0.2.2.1..0.2.1.0..0.1.1.1..1.1.2.0..2.0.2.2..0.0.2.1..1.0.2.0
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