Slitherlink: Logic Loop Puzzle

Slitherlink: Logic Loop Puzzle

Draw a single, unbroken loop through the grid — no loose ends, no crossings, no guessing.

Slitherlink is a pure logic puzzle. Each numbered cell tells you exactly how many of its four sides are part of the loop. Use those clues to deduce the path, step by step, until the loop snaps shut and the grid lights up.

How to play

Tap an edge to draw a wall segment
Tap again to mark it as empty (×)
Tap a third time to clear it
Every numbered clue must be satisfied exactly
The finished loop must be a single closed path with no branches

Features

150+ hand-curated puzzles across six difficulty tiers
Beginner puzzles to learn the rules, Master puzzles to test your limits
Pinch to zoom and drag to pan on large grids
Long-press any wall segment to highlight a connected section
Built-in mistake checker — tap Check to illuminate clue violations
Undo and redo support
Timer tracks your solve time
Progress saves automatically
Background music with toggle
Clean, readable board design optimized for all screen sizes

Difficulty tiers
★ Beginner — gentle introductions, small grids
★★ Easy — building confidence
★★★ Medium — where the real logic begins
★★★★ Hard — multiple deductions required
★★★★★ Expert — for seasoned puzzlers
★★★★★★ Master — the ultimate challenge
Beginner and Easy puzzles are free. Unlock the full library with a single one-time purchase — no subscriptions, no ads, no tricks.

If you enjoy Sudoku, Nonograms, or Picross, Slitherlink will feel right at home.