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Sudoku X Puzzle Book


Welcome to this exciting selection of Sudoku X puzzles. The book contains 100 brand new 9x9 sudoku X puzzles. The rules are simple:

- Place the numbers 1 - 9 once in each row, column and 3x3 box in the grid.

- In addition, the two major diagonals of the puzzle (marked in grey) must also contain the numbers from 1 - 9 exactly once.

That's it! Armed with just those rules, you must place numbers in all the empty cells in the grid to solve the puzzle.

If you would like to try a few of the puzzles before buying this book, please click the link below:

Sudoku X Sample

The book is available to purchase from Amazon.co.uk, Amazon.com and Amazon.eu. Please click the relevant link below to purchase this book via Amazon:

If you're based in Europe but outside the UK, then this book is also available on the version of Amazon in your country. If you're based in Europe but outside the UK, then this book is also available on the version of Amazon in your country.

Sudoku X Solving Strategies

Sudoku X was the first variant of sudoku to appear on the market, and was promoted as sudoku with the X-factor, and other similar punny names. However, it has sadly disappeared from many publications in recent years, making it harder and harder to find. Therefore we decided to publish a book dedicated purely to this now neglected sudoku variant - we hope that if you're a sudoku X fan, you'll enjoy this collection of 100 puzzles!

Here is a video explaining the rules of Sudoku X:

Never tried a Sudoku X puzzle? You can try a sample Sudoku X Online here. If you prefer to play puzzles online rather than in print, you can also play thousands of online puzzles with a membership to the Puzzle Connoisseur's Club.

But what rules are required to solve the puzzle? Well, that's the joy of sudoku X - unlike some other sudoku variants that have some very complicated rules, all you do with sudoku X is to apply the standard rules, but to the two major diagonals too that form the 'X' region. The key to success in sudoku X is to use these grey regions to solve the puzzle: most people get stuck when solving by forgetting to make deductions along the X's that are surprisingly powerful in aiding solving: indeed this can be seen by the fact that sudoku X contain less givens in many cases than standard sudoku puzzles.

If you would like to try a sample before deciding whether to buy, then please do print off the sample puzzles linked to above: we've put six on this site free of charge so that you have a good idea of what the puzzles are like and how difficult they are. We hope you'll agree that they make a fun change from standard sudoku without being too different to the standard puzzle to lose that unique sudoku charm.

If you have any solving tips or comments on sudoku X or indeed any other puzzle, then we would love to hear your thoughts, so please do get in touch with us!

Sudoku X

Sudoku X Interior

Consecutive Sudoku Rules

In our new series of videos, you can learn about new puzzle types and take part in quizzes. Why not have a watch?

The rules of this unusual sudoku variant are explained in this video - they can be really fun to solve but you need to understand what the bars between squares mean and that all are shown...

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