What is Sudoku?

Sudoku is a logical puzzle game, originally created in puzzle books and then made available in countless newspapers worldwide. We explain what makes a Sudoku and why solving them is good for you.

How to start

Sudoku may seem difficult at first glance, but actually it is not as hard as it looks! The aim is to fill in the whole grid – and depending on the difficulty of the puzzle this can be quite easy (just counting and checking), or later on for more tricky puzzles require a bit more logic and reasoning. We explain how to complete your first Sudoku puzzle.


Learn how to go from simple, easy to learn deduction techniques such as Single Position and Single Candidate through to the mind-bending Swordfish and Nishio techniques. And how, if all else fails, you can guess!

Daily Sudoku puzzles

You can find six brand-new puzzles here every day, ranging from beginner through to diabolical puzzles that require the most advanced techniques. Here’s one of today’s puzzles:

Get the app

For the best Sudoku playing experience, download our free* Sudoku of the Day app! You’ll get easy access to all six daily puzzles, a range of easy to use tools such as pencilmarks and smart hints, plus you can upgrade to access the puzzle generator and puzzle solver.

Looking for packs for your Palm Centro (or other Palm OS or Windows Mobile device)?

It might be hard to believe, but “in the wild” there are still quite a few Palm Centro owners who still have working devices, and who haven’t migrated to another device. Astraware Sudoku was bundled with these devices as a built-in app back in 2007, and as a result Centro owners made up the majority […]

Latest Sudoku Of The Day app for Android – supporting most devices!

We’ve just updated our Sudoku Of The Day App for Android, which adds support (by the magic of clever scaling) for most Android phones and tablets that have been released recently! Even owners of the latest devices should find that the game scales its graphics nicely, and hopefully as readably as possible! Get the latest version […]