Print Loop Puzzles (Slitherlink) for Free

Print Loop Puzzles (same rules as Slitherlink) large on A4: 120 puzzles from Easy 6×6 to Oni 12×12. Print 1 puzzle at a time and page 2 is the answer. All free, with nothing to sign up for.

Solve on a phone or computer →

1Choose a grade

31233303233311Easy (6×6)For first-timers, or for solving with a child.See all 30 puzzles →313203221223223221222232213222Normal (8×8)For those used to Easy. Learn the shapes at corners and 3s and you will get further.See all 30 puzzles →33012002111103330331323131331222212Hard (10×10)For those who can solve Normal. Uses inside and outside.See all 30 puzzles →3123312111212222312212222232333331212211213112321322211121Oni (12×12)For those who can solve Hard. Take your time.See all 30 puzzles →

2How to print

  1. Choose a grade, then a puzzle number. The numbers follow the order of the puzzles in the game.
  2. Press "Print this puzzle". Page 1 is the puzzle and page 2 is the answer.
  3. To print many at once, press "Print all puzzles" on the grade's page. The answers print separately.

The rules and ways to solve are in How to play the Loop Puzzle, and one puzzle solved from start to finish is in Solving one 8×8 puzzle.

3Questions

Is it really free?

Yes, and there is nothing to sign up for. You can print the 120 puzzles that are free in the game (the first 30 each of Easy, Normal, Hard and Oni).

Do they come with answers?

Print 1 puzzle at a time and page 2 is the answer. If you don't want the answer, choose "Print puzzle only". On each grade's page you can also print just the answers, all together.

Is there only one answer?

Yes. Every puzzle has one loop only. Easy needs only counting each number's lines, Normal also uses shapes such as 3 corners, and Hard is solved by thinking about inside and outside. Oni has moments when you try a line and see if it holds.

How do I solve them on paper?

Join the dots with pencil lines, and write a small × on any side you have decided has no line. A pencil is best, so you can rub out mistakes.

Can I hand them out at a school or other facility?

You are free to print them and hand them out for lessons, brain training, recreation and the like. Please do not collect the puzzles to sell or redistribute them.

Can I solve them on a phone too?

Every puzzle can be solved right in the browser from "Solve on screen". You can use ×, Undo and Hint there too.

Slitherlink is a trademark of Nikoli Co., Ltd.