Some solutions for n=6:
.-5...-5...-5...-3...-6...-4...-6...-6...-6...-4...-4...-5...-5...-6...-5...-6
..0...-2....3....3....3...-2...-6....5....3...-3...-1...-2...-5...-1...-4....4
..2....1...-4...-3...-5....6....2...-6....5....1....1...-2....3....4....6...-5
.-3...-2....4....3....2...-4....3....5...-5....3....4....5....2....4....6....6
..2....3...-2...-3....3....3....2...-3...-1....0....0....2....0...-3...-5...-5
..4....5....4....3....3....1....5....5....4....3....0....2....5....2....2....6
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