Subject

    Computer Science

    Topic

    Artificial Intelligence

    For the 8-puzzle, which of these heuristics is admissible?

    a)
    Twice the number of misplaced tiles
    b)
    The number of misplaced tiles
    c)
    The number of moves already made
    d)
    The total number of tiles

    Explanation

    Every misplaced tile needs at least one move, so counting them never overestimates.

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