Some solutions for n=4
..1..3..2..2....2..0..0..0....1..3..2..3....3..2..1..3....3..2..0..2
..1..1..3..2....0..1..0..1....1..0..0..1....0..3..1..0....3..2..3..3
..0..1..0..3....3..3..3..2....1..1..1..2....2..1..0..3....2..3..0..0
..3..1..3..2....3..0..3..0....2..3..0..3....3..3..3..3....1..2..3..2
..2..1..1..2....2..0..2..2....3..0..0..3....2..1..3..1....2..0..2..1
..2..0..1..3....3..0..0..0....3..3..2..1....3..0..0..1....0..1..2..1
|