Slitherlink are addictive loop-forming puzzles which were invented in Japan. Using pure logic and requiring no math to solve, these fascinating puzzles offer endless fun and intellectual entertainment to puzzle fans of all skills and ages.
Each puzzle consists of a rectangular lattice of dots with some clues in various places. The object is to connect the dots surrounding each clue so that the number of lines equals the value of the clue and the lines around all clues form one continuous loop with no crossings or branches. Empty squares may be surrounded by any number of lines.
The game features 2-finger tapping for quick zoom, auto complete clues setting and a link segment highlighting option to help to avoid creating separate loops. To help see the puzzle progress, graphic previews in the puzzle list show the progress of all puzzles in a volume as they are being solved. A Gallery view option provides these previews in a larger format.
For more fun, Conceptis Slitherlink includes a Weekly Bonus section providing an extra free puzzle each week.
• 120 free Classic Slitherlink puzzle samples
• Extra bonus puzzle published free each week
• Multiple difficulty levels from very easy to extremely hard
• Puzzle library continuously updates with new content
• Manually selected, top quality puzzles
• Unique solution for each puzzle
• Hours of intellectual challenge and fun
• Sharpens logic and improves cognitive skills
• Concurrently playing and saving multiple puzzles
• Puzzle library sorting and hiding options
• Graphic previews showing puzzles progress as they are being solved
• Unlimited Undo and Redo
• Auto complete clues
• Highlight link segment
• Quick zoom using 2-finger tap
• Check puzzle
• Track puzzle solving times
• Backup & restore puzzle progress to iCloud
Slitherlink have also become popular under other names such as Fences, Loop the Loop, Loopy, Suriza, Dotty Dilemma and Number Line. Similar to Sudoku, Kakuro and Hashi, the puzzles are solved using logic alone. All puzzles in this app are produced by Conceptis Ltd. - the leading supplier of logic puzzles to printed and electronic gaming media all over the world. On average, more than 20 million Conceptis puzzles are solved each day in newspapers, magazines, books and online as well as on smartphones and tablets across the world.
This version improves performance and stability.
Ratings and ReviewsSee All
Challenging and fun
I play several Conceptis games that I love, but this may be my favorite. It took me a bit to catch on to how you play, but it was never one of those that was just too frustrating and made me want to give up. I love the design and playability of the game—I’ve tried a couple other apps with this game, and they were definitely more clunky.
I have anxiety disorder, and I find when I’m feeling especially anxious, this game is strangely calming—I think maybe it’s partially having something that has a predictable result.
Once you understand
Once you understand the basic rules of where lines cannot be placed it makes it feel less daunting to complete the puzzles. I play these when I want to relax or detox from social media lately & it’s been really awesome to find a puzzle game that is the right amount of challenging but not overwhelmingly hard that I get frustrated.
I do wish there was an option/tool to choose between adding lines and placing the X markers instead of double tapping to get to the X. Since I start the puzzles marking out where not to place a line it would be easier to be able to switch from one to the other with the click of one button instead of repeatedly double tapping, I hope that makes sense. But other than that I love this app.
Great fun, offers SO many different puzzles
This app is great fun, thought-provoking and offers SO much variety of different puzzles at various difficulty and sizes. You’ll need to read the Help Menu to learn how to play. You’ll want to read (I highly recommend reading) the Techniques section as well, it’s a lifesaver. I even wrote them down to use as a reference until I knew them by heart. I am a Conceptis Puzzles fan and this is one of my favorites.
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- Conceptis Ltd.
- 26 MB
- Requires iOS 8.0 or later.
- Requires iPadOS 8.0 or later.
- iPod touch
- Requires iOS 8.0 or later.
English, Japanese, Simplified Chinese
- Age Rating
- © Conceptis Ltd.
- In-App Purchases
- Easy Variety 1 $1.99
- Medium Variety 1 $1.99
- Hard Variety 1 $1.99
With Family Sharing set up, up to six family members can use this app.