Speed Slide Puzzle

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Please input the sentence that you want to translate here. The input language is judged automatically.

I move a number with an empty trout and am a classic puzzle game to sort at the position same as completion form.

Because it becomes a thyme attack system, please sort it as soon as possible.

With 15 puzzles which there are 15 pieces on a board of 4x4

There are 8 puzzles which there are 15 pieces on a board of 3x3.

I am called the sliding block puzzle.