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To solve the puzzle:
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The flashing dot shows which square you're on.
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Move one square at a time up, down, left, or right by clicking in the square you want to move to.
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To undo part of your path, just retrace your steps by clicking back one square at a time, or shift-click any earlier square to go back more than one square at a time.
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If you try to make a move that's not allowed, the path won't draw.
Remember, every empty square must be part of the path for the puzzle to be complete.
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Warning: If you leave the puzzle page and then return, the puzzle may reset with any work you've done lost.