Some solutions for 4X9
..0..3..2..1..2..3..2..1..1....0..2..2..1..2..2..1..2..0
..2..0..0..2..0..0..0..2..1....2..1..0..2..0..1..1..1..2
..0..3..2..1..2..3..2..1..1....1..1..3..0..3..1..2..1..1
..2..0..0..2..0..0..0..2..1....2..1..0..2..0..1..1..1..2
|