Slitherlink vs Slitherlink

Slitherlink is a classic logic puzzle played on a grid. Some cells contain number clues. Your goal is to draw a single continuous loop along the grid edges so that every clue is satisfied. Each number tells you how many of its four sides must be part of the loop. The loop cannot branch, cross itself, or form multiple smaller loops. Every puzzle has exactly one correct solution and can be solved using logic and deduction alone — no guessing required. Simply tap the space between two dots to switch edge states: line → X → empty. Mark lines to build your loop and use X to eliminate impossible edges. Enjoy unlimited fun with infinity puzzle generation, so you will never run out of challenges. Play offline anytime, anywhere. Choose Quick Mode with Easy, Medium, or Hard difficulty, or test your skills in Challenge Mode with 100 handcrafted levels. The game supports both light and dark mode for comfortable play day or night. Clean design. Pure logic. Endless puzzles.

Slitherlink, the classic logic puzzle — drawn like pen on paper. The rules are simple. Each number counts the lines surrounding its cell. Satisfy every number while drawing one single closed loop — no branches, no crossings — and the puzzle is complete. It looks easy, and then the logic gets delicious. Every puzzle has exactly one solution. Guessing is never required: every generated puzzle is mathematically verified to have a unique answer. Difficulty names mean something here, too — we measure the depth of reasoning each puzzle actually needs, and only serve ones that earn their label. ■ Features • New to Slitherlink? A hands-on tutorial teaches the rules on a tiny practice board • Four difficulties — from Easy 5×5 to Expert 12×12 • Daily Puzzle — the same board for everyone each day, with an attendance calendar and streaks • Paper-quiet design — an ink-and-paper ledger look, in light and dark • Comfortable controls — tap to draw, long-press to mark ×, drag along the dots • Room for big boards — pinch to zoom, two-finger pan, iPad and Apple Pencil support • Mistake-proof — unlimited undo/redo and automatic saving • Track your progress — best and average times per difficulty For the moments you want quiet focus, one board of Slitherlink is enough.