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