n=5的一些解决方案:
.-2...-2...-2...-2...-3...-1...-1...-2...-2...-2...-1...-1....0...-1...-1...-1
..0...-2...-1....0...-2....0...-1...-1...-1...-2...-1...-1....0....0....0...-1
..0....0....1....1....2....0...-1....1....2....1....1....0....0....0....1....0
..2....2....2....1....3....1....1....1....2....2....0....2....0....0...-1....1
..0....2....0....0....0....0....2....1...-1....1....1....0....0....1....1....1