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Sudoku Xtra, written by Dr Gareth Moore
Sudoku Xtra 24
logic puzzle compendium
Printed puzzles from Dr Gareth Moore

Sudoku
 
Hanjie
 
Kakuro
 
Futoshiki
 
Calcudoku
 
Hitori
 
Killer Sudoku
 
Nurikabe
 
Slitherlink
 
Skyscraper

Sudoku-X
 
Jigsaw Sudoku
 
Consecutive Sudoku
 
Kropki Sudoku
 
Sudoku XV
 
Oddpair Sudoku
 
Toroidal Sudoku
 
Killer Sudoku-X
 
Killer Sudoku
Pro

 
Jigsaw Killer
Sudoku

Looking for puzzles for your book, magazine or newspaper?
 

 
How to play Sudoku X

Sudoku X builds on the rules of Sudoku. If you don't know how to play Sudoku then take a look first at the rules of Sudoku.

A Sudoku X puzzle adds to the standard rows, columns and bold-lined boxes by also requiring that you place 1 to 9 (or 1 to whatever the width of the puzzle is) into each of the two main diagonals, highlighted on puzzlemix in pink:

In this example puzzle you can use this new rule to immediately place the '1' in the centre box, as shown in the picture below. It can be eliminated from the centre square of the box because it is already in one of the diagonals.

When the puzzle is fully-solved you will have 1 to 9 in each row, column, 3-by-3 box and marked diagonal as shown here:

And that's all there is to Sudoku X!

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