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