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