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