Number Knot

Nullify Games

Contains adsIn-app purchases

About this game

The most popular official Hidato game with over 9 million downloads!

Play hundreds of puzzles for free, with more on the way! Puzzles range from easy 3x3 grids to tough 12x12s - best played on tablets.

Each puzzle starts with just a few numbers filled in. You must fill in the rest to build an ascending sequence of connected numbers moving sideways or diagonally.

Many puzzles have several solutions, but 300 are official Hidato puzzles that have only one solution to find.

Use hints to help you when you get stuck. Gain more hints by watching an advert, or buy some from the in-game store. Find the free hidden hint each day!

Thank you for supporting independent developers!

Ratings and reviews

The concept is simple, but many of these puzzles can be almost infuriating to complete. The range of complexity is very wide, which means there's one to fit any state my brain finds itself in. Addendum: Having owned this game for well over a year, I'm still coming back to it. I've gotten far better and am ready for a level beyond the red now. I hope the developers introduce one soon.

I'm not sure what happened, but apparently it's lost my progress, tapping on the grid doesn't always change the selected cell, and the whole thing is suddenly harder to actually complete. Add to this the fact that the Back button is in an odd spot (right beside the Restart button), and the fact that it plays an ad every single time you go back to the puzzle selection screen (whether you finish the level or not), and it's far more frustrating than it's worth.

Great logical puzzles. Some can appear easy but then you may get stuck and have to change your answers. Software error: none of my hinter achievements have been rewarded despite achieving them. Sometimes I use hints but they are not counted towards the hinter achievements until I leave the game then open it another time. I have become a master achiever, therefore I should have hinter achievements. I have not been rewarded my master achievement either despite achieving it.