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