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How to Play

Form a loop with the numbers as hints.

Clicking on a edge darkens a line. Clicking on them again undarkens it. A double click erases the line.
The number inside the squares indicates the number of lines that should be drawn around the four lines that surround it. A square with no number can have any number of lines around it.
There is only one solution.
There can only be a single loop with no loose ends.

Loop the Loop