Some solutions for 4X8
..0..0..0..0..0..0..0..1....0..0..0..0..0..0..0..3....0..0..0..0..0..0..0..0
..0..0..0..0..0..0..1..6....0..0..0..0..0..0..1..2....0..0..0..0..0..0..0..4
..0..0..0..0..0..0..2..1....0..0..0..0..0..0..2..0....0..0..0..0..0..0..3..2
..0..0..0..0..0..0..2..2....0..0..0..0..0..0..4..2....0..0..0..0..0..0..6..7
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