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