One loop, drawn from the numbers

  • Free, no sign-up
  • A daily puzzle
  • Four grades
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How to play, and tips

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About the loop puzzle

What is a loop puzzle?

A loop puzzle is a board of dots on which you draw one loop, joining dot to dot. A number in a square says how many of its four sides the loop runs along. The loop never branches or crosses itself. When it closes and meets every number, it is solved.

This loop puzzle

  • 400 puzzlesA hundred each at four grades: easy 6×6, normal 8×8, hard 10×10 and Oni 12×12. Every one has a single answer you can reach without guessing. 120 of them are free.
  • Free, no appPlay in the browser on a phone, an iPad or a computer. Nothing to sign up for.
  • A daily puzzle and its rankingThe same 10×10 for everyone, new at midnight in Japan. Race for the quickest time.
  • Trace the linesSlide a finger from dot to dot. When the loop closes, its inside fills with colour.
How to play, and tips (reading the numbers, the rules, solving)

Questions

Is it free?

Yes. Nothing to sign up for: it plays in the browser at once. 120 of the 400 puzzles are free, and the rest come with the Lounge Pass or a ticket. Today's puzzle and its ranking are free too. Signed in with Google, tickets come free as a daily gift, for solving today's puzzle, and more.

Can I play on a phone?

Yes. In the browser on a phone, a tablet or a computer. Nothing to install.

Is it the same as Slitherlink?

It has the same rules. Slitherlink is a registered trademark of Nikoli, so it is called the loop puzzle here.

What is the Lounge Pass?

A subscription that takes the ads away in every game and opens everything that would need the Pass or a ticket. Here, all 400 puzzles. Without it, one ticket opens the next puzzles along a road (5 easy, 4 normal, 3 hard or 2 Oni). ¥500 a month or ¥5,000 a year, tax included, with a 7-day free trial the first time. The first 100 founding members pay ¥300 a month or ¥3,000 a year, for as long as they keep it.

Does every puzzle have one answer?

Yes. Every puzzle has a single loop, reached step by step from the numbers without guessing. Only the Oni ones ask you to draw a line for a moment and see that it cannot be.

Can I see the answer?

While you play, a hint tells you how to find the next line. If you need more, it shows where, and then draws it. Lines drawn by mistake come first.

What happens if I go wrong?

You are not told on the spot. Only a square with more lines than its number, and a dot with three lines or more, turn red. When the loop closes and meets every number, it is right.