Switches vs Slitherlink

Seven lights and six switches! Make all the lights glow. Luck or logic? Both are possible. And how do you go about finding the right switch combination? It's easy to get started, and then you're really challenged. Your ability to recognise patterns is strengthened.

Follow the number clues and draw one continuous loop. Each clue tells you how many of a cell’s edges belong to the loop. Connect the right edges without branches, crossings, or loose ends. 1,200 PUZZLES TO EXPLORE • 900 puzzles across Easy, Medium, and Hard • 300 new Expert puzzles, available with Premium • Start with 100 free Easy puzzles. Premium unlocks the full collection. MAKE IT A DAILY HABIT Try a fresh daily challenge and keep your streak going. Learn the rules through clear explanations, then build your skills with guided practice. SOLVE YOUR WAY Add your own notes to mark cells as inside or outside the loop. Optional automatic crosses offer another solving aid: they are off by default and unavailable in Daily challenges. • Play puzzles offline • Choose readable light and dark themes • Follow your progress with Game Center leaderboards and achievements • Play with VoiceOver labels, hints, and adjustable text Start with a free puzzle and close your first loop.