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