Some solutions for 4X3
..1..0..2....1..0..2....0..1..0....1..1..1....1..1..1....0..0..0....1..0..2
..2..0..2....2..0..1....1..2..1....1..1..2....2..2..3....2..0..1....3..2..3
..1..1..0....0..1..0....0..1..1....1..1..1....1..1..0....0..1..0....0..1..0
..0..1..2....3..0..2....2..2..2....0..1..1....0..3..2....1..1..0....1..3..1
...
...3..4.......3..3.......4..4.......4..5.......6..7.......2..1.......6..7...
...4..3.......3..2.......4..5.......4..5.......6..6.......3..2.......6..6...
...3..4.......4..3.......5..6.......3..4.......5..6.......3..2.......5..5...
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