n=5,k=3的所有解:
..2....1....1....1....1....1....1....1
..3....2....2....2....2....2....2....2
..2....3....1....1....1....3....1....1
..3....2....2....2....2....2....2....2
..2....1....1....3....1....3....3....1
..3....2....2....2....2....2....2....2
..2....3....1....3....3....3....1....1
..3....2....2....2....2....2....2....2
..2....3....3....3....3....3....3....1
..3....2....2....2....2....2....2....2
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