Some solutions for n=8
.-1...-3....2...-2...-3....0....3....0...-1...-2...-1....3...-2...-1....2....3
.-3...-3....3....1...-3....0....2....2....2....0....1....3....0....1...-1....0
..0....0....1...-2....0...-2....2....0....0....0...-2....0....0...-1...-3....3
..2....3....1....1....2....0....0...-1....1....1....0....0...-3...-1....0....1
..1....0...-2....0...-1....0...-3...-1...-1....2....0...-2....0....0....1...-2
..0....1...-2....1....0....1...-2....1....2....0....0....0....2....0....1....0
..0....1...-1....2....3....1...-2...-2...-1....1....0...-2....2....1...-1...-3
..1....1...-2...-1....2....0....0....1...-2...-2....2...-2....1....1....1...-2
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