Abstract
One important MN-puzzle problem is to find a sequence of up-down and right-left movements of the empty-cell so that a goal-pattern can be achieved from a given initial-pattern. The second problem is to characterize the totality of the goal-pattern from a given initial-pattern. The third problem is finding the fewest movements to achieve it. In this paper, these problems will be completely solved.
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Yang, H. A characterization of achievable patterns of the MN-puzzle problem. J. of Comput. Sci. & Technol. 5, 266–274 (1990). https://doi.org/10.1007/BF02945315
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DOI: https://doi.org/10.1007/BF02945315