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