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Loop the Clues

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Include separate answer key

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About this template

Connect adjacent dots into one closed, nonbranching loop. Four tiny patches show zero, one, two and three surrounding edges; empty cells impose no edge count. Starter uses a three-by-three clue grid, Growing a four-by-four grid with more blanks. Every original board is checked for one loop solution, exact counts and connectedness. A separate key draws the loop. Demonstrate the rule before independent use.

Suggested ages 8–12 · edge constraints

Activity references

Nikoli Slitherlink