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