Sudoku Xtra

Sudoku Xtra 24

Sudoku Xtra 24

Sudoku Xtra 24 is now finally available! It’s packed with 130 puzzles of a wide range of types, including a huge variety of sudoku variants.

This issue I’ve included a very wide range
of variants, including some new ones such as Two-grid Interconnected Sudoku, Mystery Multiple
Sudoku and Blackout Sudoku. Meanwhile I’ve made an effort to include all of the most popular
variants as requested by readers, such as Consecutive Sudoku, Inequality Sudoku, Odd/Even
Sudoku and of course many more.
If there’s anything you’d like to see in a future issue

This issue I’ve included some new sudoku types such as Two-grid Interconnected Sudoku, Mystery Multiple Sudoku and Blackout Sudoku. I’ve also made an effort to include all of the most popular variants as requested by readers, such as Consecutive Sudoku, Inequality Sudoku, Odd/Even Sudoku – and of course many more.

There’s also a range of non-sudoku puzzles, including Light-up/Akari, Hashi, Slitherlink, Battleships, Skyscrapers, Calcudoku, Futoshiki, No Four in a Row, and more!

It’s available either as a PDF to print yourself (every page is self-contained, so you can print only the pages you want), or as a professionally-printed book direct from Amazon – there are links for all of these on the Sudoku Xtra site.

Sudoku Xtra 21

Sudoku Xtra 21Sudoku Xtra 21 is now available, both as a PDF download to print yourself and also as a pre-printed book from your local Amazon store.  Follow the links on the Sudoku Xtra website to get hold of it in your preferred form.

Sudoku Xtra 21 is packed full of 144 top-quality logic puzzles covering a wide range of types. There is a particular emphasis on Sudoku and new varieties appearing for the first time in this volume include Quad-Max Sudoku, Anti-Knight Sudoku, Slashed Sudoku, Minus Little Killer, Product Frame Sudoku, Headless Worm Sudoku, Extra Region Windmill Sudoku, Non-Consecutive Diagonal Sudoku, Mystery Calcudoku Zero and a giant Trio 13-grid Samurai Sudoku.

The very first page features a large Arrow Samurai Sudoku, and other returning variants that were recently introduced to the series include Worm Sudoku, Quad Clue Sudoku, Offset Sudoku, Sudoku XV and Kropki Sudoku.

Not only that, but there’s Hanjie, Futoshiki, Hashi, Yajilin, Calcudoku, Dominoes, Hitori, Slitherlink and many more logic puzzles.

Pre-printed copies are on top-quality, 8.5×11 inch paper ideal for solving on, while download PDFs are designed to fit both A4 and Letter paper for printing.

Sudoku Xtra 20

Sudoku Xtra 20Sudoku Xtra 20 is out now, available pre-printed from your local Amazon or as a PDF to download and print yourself.

Issue 20 is packed with 151 puzzles, featuring many new Sudoku variants including Arrow Sudoku, Worm Sudoku, Anti-King Sudoku, Quad Clue Sudoku, Argyle Sudoku, Frame Sudoku, Little Killer Sudoku, Extra Region Pointers Sudoku, Offset Sudoku, a huge Odd/Even Samurai 13-grid Sudoku and more, plus the new varieties introduced in Sudoku Xtra 19 are back too. Tapa and LITS puzzles also return this issue, along with many existing favourites, such as Hanjie, Battleships, Hashi, Calcudoku, Slitherlink and so on. There’s a full list on the Sudoku Xtra magazines page.

Sudoku Xtra 18

Sudoku Xtra 18The 18th issue of Sudoku Xtra is now available, either pre-printed or as a downloadable PDF.  It’s designed so each page can be printed separately, so you need only print the puzzles you want to try, and all of the puzzle content is in black and white.

This issue features 130 logic puzzles in a wide range of designs and sizes, from 5×5 right up to larger than 30×30.  Puzzle types include Yajilin, Heyawake, Nurikabe, Masyu and more of the Windows puzzles introduced in the previous issue, plus an enormous range of different Sudoku variants including many seen on this blog.

There’s also a packed Community Puzzles Section featuring content from the world’s best puzzle authors, such as David Millar’s awe-inspiring Knighted Samurai Shape Sudoku through to more of Vexus Puzzle’s delightful route-finding Tiktaka.

Sudoku Xtra 16 and Sudoku Xtra 17 have also been published since I last updated this blog, so head over to the Sudoku Xtra magazines page for more details.

You can also view a full list of the contents of each magazine on the Sudoku Xtra site.

Sudoku Xtra 16Sudoku Xtra 17

Sudoku Xtra Issue 15

Sudoku Xtra Issue 15Sudoku Xtra issue 15 is now available for download from, and it’s another packed issue of the logic puzzle magazine.  With 59 different types of logic puzzle at a wide range of difficulties it’s got something in it for everyone, and it’s far from just Sudoku and variants. In fact there’s not a single regular 9×9 Sudoku in the whole magazine! From the giant cover Masyu through to the Tapa, Heyawake, Nurikabe, new puzzles and more there is plenty to keep you busy.

The magazine can be downloaded as a PDF and printed at home, or it can be ordered pre-printed from Lulu or (the last of these coming in the next week or so, once their system updates and lists it).

I’m also now posting full lists of content over on the magazines page at,so you can click the expanding links to see a list of every puzzle in both this and the previous two issues, as well as order back issues.

And talking of back issues, I didn’t post here previously but issues 13 and 14 are also available (and have been for 4 and 2 months respectively), although the issues of these have only just been uploaded so again these should appear in the next week or so.

Sudoku Xtra 13Sudoku Xtra 14

Sudoku Xtra 12

Sudoku Xtra 12I must apologise for the delayed announcement, but Sudoku Xtra issue 12 has been available for a while from Both download and pre-printed copies available.

The cover puzzle is a giant Masyu, and then it follows through from there with the usual varied mix of sudoku variants and other puzzles, plus an extra-large bumper-packed Community Puzzles section.

This issue features more than 65 pages, leading to a record-breaking total of 139 puzzles! You’d need to complete more than 4 a day in order to do them all in time for the next issue. There are also two special Christmas Tree Sudoku puzzles (both much easier than they might look and really quite fun I think!) – it may be past Christmas now but they’re still fun puzzles!

Issue 13 is also due out in the next few days.

Sudoku Xtra 11

Issue 11 pre-printed version coverSudoku Xtra 11 is now available, and it is packed with even more puzzles then last month!

The cover features a Boomerang Samurai, made up of 10 overlapping 8×8 puzzles, and then later on there’s a double-page spread with a real X factor, the facing Return of the Boomerang 1 & 2 – consecutive and odd/even-pair variants.

There are also heyawake, yajilin, nurikabe, masyu, dominoes, calcudoku, slitherlink, killer sudoku prime, killer sudoku pro +/-, variant size jigsaw, hitori and many more puzzle types. And there’s a second huge 13-grid 9×9 Samurai, with a Consecutive Samurai 13-X – every bit as huge and intimidating as you might imagine!

The Community Puzzles section this month welcomes another new contributor, Deb Mohanty, a key member of the Indian puzzle community and author of some very well-respected puzzles and competitions. His “No 4 in a Row” puzzles will challenge your ability to both spot the “obvious” and also reason using uniqueness logic! There are also more Labyrinth puzzles, more Haijo from Vexus, an alternative set of Yajilin from Thomas Collyer, and the hexagonal ‘Hexagodoku’ from Clarity Media. David Millar’s mighty Knight Samurai Sudoku +/- will test your Sudoku variant skills to the limit, with its five grids of attacking knights and positive and negative numbers. And that’s just some of what’s in the section this month.

Sudoku Xtra 11 is available for download as a PDF, as well as pre-printed from Lulu and also from (eligible for free super-saver shipping!).

Sudoku Xtra 8 now out

Sudoku Xtra 8Sudoku Xtra issue 8 is now available for download! Printed copies are available from Lulu already, with due to follow in the next week or so.

There’s an ‘S’ theme for a few of the puzzles this month, as you can see on the cover (right).

This issue I’m very excited to welcome some brand new Community Puzzles section contributors – Thomas Collyer, the two-time UK Times National Sudoku Champion; and Grant Fikes, one of the most prolific authors of Japanese puzzles outside Japan itself – who have very kindly donated some fantastic puzzles to this issue. There are also some brilliant Slitherlink/Sudoku cross-over puzzles by David Millar of The Griddle, and that’s only half of the section described so far!

The rest of the magazine as always has some new variants and rearranged content in, including Killer Prime (Killer Sudoku with prime numbers…) and Skyscraper S (a twisted 6×6 Skyscraper variant!). At just £3.99/$5.99 for a download it’s still incredible value even when compared to cheaper mags – with 116 puzzles that’s less than 4p/6¢ a puzzle, and you’d have to average around 4 a day to get the whole issue complete in time for issue 9!

With over 50 different types of puzzle in issue 8, what are you waiting for?! :)

Sudoku Xtra 7 magazine now out

Sudoku Xtra Issue 7 coverSudoku Xtra issue 7 is now out! It’s available for download and also pre-printed from Lulu (for UK and most of the world), with the pre-printed version (for the US) due to follow in around a week or so (once they update their database).

Issue 7 of Sudoku Xtra contains even more large-page Japanese puzzle fun, with an incredible 116 varied logic and number puzzles. A special section in this issue is devoted to giant puzzles, with the 13 full-page puzzles including Hanjie, Nurikabe, Yajilin, Slitherlink, Hashi, Samurai Sudoku variants, Kakuro and more.

Sudoku Xtra offers greater variety than any other puzzle publication, with a huge range of Sudoku variants that include Jigsaw, Extra Region, Skyscraper, Consecutive and many more. Other featured puzzles include Calcudoku, Futoshiki, Hitori, Killer Sudoku and a range of variants, including Zero Killer Sudoku Inequality!

Designed to print on either A4 or Letter paper, or pre-printed on similarly large paper, Sudoku Xtra features puzzles at a range of difficulties, so is suitable for both logic puzzle fans and casual solvers alike. No matter what you like, you’re sure to find many puzzles to enjoy in Sudoku Xtra issue 7.

There’s also another great Puzzle Community section too, thanks to the generous contributors. Puzzles sent in for issue 7 include Navigrid, Mini Killer Sudoku, Knighted Sum Sudoku, Fillomino and more.

Get Sudoku Xtra 7 now.

Sudoku Xtra 6 available worldwide

Sudoku Xtra issue 6 coverI’m pleased to announce that Sudoku Xtra issue 6 is now out and available for the full triumvirate of download and self-print, pre-printed from Lulu (recommended for most of the world) and also free same-day posting from (recommended for US). 

It’s packed with a frankly ridiculous 133 separate puzzles. The range of content includes:

  • Light-up / Akari
  • A large cover Nurikabe puzzle
  • -4 -3 -2 -1 0 1 2 3 4 Killer Sudoku – back by popular demand!
  • A third Jigsaw 6×6 Variety Pack of miniature variants
  • An extra-big Yajilin
  • Killer Inequality Sudoku – lots of symbols on a grid!
  • Dominoes - first time back since issue 1
  • Plus all of the regular puzzles, from Skyscraper to Samurais to Calcudoku to Hashi to Hanjie to Kakuro and so on…

There’s a bumper-packed Puzzle Community section too, thanks to the generous contributors. Just look at some of the types that are in issue 6: 

  • Yin Yang Sudoku
  • Sudoku Minus (a trickier version of Sudoku Times!)
  • Hexagon 25
  • Klump
  • Modula
  • and more!

So if you’d like a copy (and if not, why not?! :-) ) then just pick one of these links:

Download and self-print *  Lulu *

Have fun! :)