SlitherLink: Loop Linkdoku

Slitherlink puzzles are wonderfully pure logic puzzles with simple rules, yet can be surprisingly rich and complex to solve. The goal of this puzzle is to draw a single loop that does not cross itself or branch. Number clues indicate exactly how many sides of the cell the loop must go through. Cells without numbers may be surrounded by any number of lines, including none at all. The loop is drawn by filling sides of cells on a grid.

PUZZLE FEATURES:
★ 720 free Classic Slitherlink puzzles
★ Extra 480 bonus puzzles published free each month
★ Support 8 sizes, from 6x8 to 16x22
★ 4 difficulty levels, including easy/normal/tricky/hard
★ A 25x35 huge puzzle is waiting for you to challenge every day
★ Unique solution for each puzzle
★ Hours of intellectual challenge and fun
★ Sharpens logic and improves cognitive skills

GAME FEATURES:
★ Comfortable and convenient operation interface
★ Indicating line that can be switched freely
★ Long press to highlight the entire loop
★ Unlimited check puzzle
★ Unlimited Undo and Redo
★ Highlight link segment to help to avoid creating separate loops
★ Two-finger quick zoom
★ Take multiple snapshots of game progress for quick restore
★ Concurrently playing and saving multiple puzzles
★ Automatically start the next puzzle
★ Backup & restore puzzle progress to Cloud
★ Track puzzle solving times
★ Compete with players from all over the world

Rules:
Each puzzle consists of a rectangular lattice of dots with some clues in various places. The object is to link adjacent dots so:
1. The value of each clue equals the number of links surrounding it.
2. Empty squares may be surrounded by any number of links.
3. When completed, the solution forms a single continuous loop with no crossings or branches.

Slitherlink are addictive loop-forming puzzles which were invented in Japan. They're also sometimes known as Takegaki puzzles, Loop the loop, Loopy, Suriza, Linkdoku, Dotty Dilemma, Number Line or Fences puzzles.