Slitherlink

Draw a single closed loop along the grid lines so that every numbered cell has exactly that many of its four sides used by the loop. The loop never crosses or branches. Also known as Loop the Loop. Fewer seconds is better.

Trains: Loop logic · Category: Logic & Puzzles

How to play: Slitherlink is a free, browser-based brain-training game in the Brain Gym suite. Play it instantly — no sign-up, works offline, and your best scores are saved on your device.

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