Posts tagged Sudoku

April 1st Sudoku

Wow, it is a long time since I posted here. So much to do, so little time!
I might as well keep it brief now, then. Here’s a puzzle for April 1st (it’s actually a normal puzzle without tricks – it just spells ‘FOOL’ in the given numbers). Place 1 to 9 in each row, column and bold-lined box.

Sudoku April 1st puzzle
Wow, it is a long time since I posted here. So much to do, so little time!

I guess that means I might as well keep it brief now, then. On that basis:

Here’s a puzzle for April 1st. It’s actually a normal puzzle without tricks – it just spells ‘FOOL’ in the given numbers. Like any Sudoku, simply place 1 to 9 in each row, column and bold-lined box.

Box-Jigsaw Sudoku

Sudoku Box-Jigsaw 9×9 1 puzzle
I haven’t posted a puzzle for a good while, so I thought it was time to fix that with this Box-Jigsaw Sudoku puzzle.

The puzzle combines regular Sudoku with Jigsaw Sudoku. Just place 1 to 9 once each into all of the nine rows, columns, 3×3 boxes (indicated by both shaded and unshaded background areas) and bold-lined jigsaw regions.

New 3D Sudoku book

A brand new book, packed with 101 Jumbo 3D Sudoku, is now available for purchase from Amazon. You can either search for this directly, or you can click through via my PuzzleBooks.org site – the book is at the very bottom of that page, and clicking on it will take you direct to the correct page on your nearest Amazon store.

If you’re not sure of the rules, or haven’t seen one of these puzzles before, then check out the example puzzle I posted last week.

Jumbo 3D Sudoku

Jumbo 3D sudoku puzzle
I haven’t posted for a while so I thought I should post one of my new puzzles. This one is a Jumbo 3D Sudoku, where the aim is simply to place 1 to 9 into each black-lined 3×3 area as well as each of the 54 rows indicated by the coloured lines. Thick black lines indicate borders where the rows don’t continue.

There’ve been 3D sudoku around for a while, and in terms of solving there’s little difference from regular sudoku except for the increase in size and the way in which the bendy regions can easily cause you to miss an “obvious” deduction! This is the biggest I’ve seen, but it’s perfectly possible there are larger ones I’m not aware of.

Anyway, if you’re a fan of samurai sudoku or any other kind of large sudoku then you should enjoy this, I hope!

Average solving time is around 1 hour.

Valentine Sudoku

Valentine Sudoku
A quick heart-shaped sudoku for Valentine’s Day. Just place 1 to 9 once each in every row, column and bold-lined box.

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.

Christmas Star Sudoku

Sudoku Christmas Star puzzle
A Sudoku, in a star shape.

Just that. (Place 1-9 once each into every row, column and bold-lined 3×3 box).

101 Giant Sudoku series

I’ve recently launched a new series of ‘101 Giant Sudoku’ books, to cater for those who like their Sudoku to be considerably larger than normal!

You can see the entire series at PuzzleBooks.org (scroll to the bottom) or visit Amazon and search for “101 giant sudoku”.

There are currently 12 books in the series: 14×14, 15×15, 16×16, 18×18, 20×20, 21×21, 22×22, 24×24, 25×25, 28×28, 30×30 and 36×36.

The larger puzzles work just as you’d expected, so in Sudoku 36×36, for example, you must place 0-9 and A-Z into every one of the 36 rows, 36 columns and 36 6×6 boxes!

These puzzles are designed so they don’t need any advanced logic – just scan the rows and columns and boxes to see what’s missing and what can fit where.

All of the puzzles are designed with attractive 8-way symmetry patterns.

iPad, iPhone and other touch support on PuzzleMix

Just a quick heads-up that PuzzleMix, my site where you can play a wide range of puzzles online, now supports touch screen play for all of the number entry puzzles – so that’s Sudoku, Killer Sudoku, Futoshiki, Calcudoku, Skyscraper, Sudoku X, Kropki Sudoku, Killer Sudoku Pro, Jigsaw Sudoku, Consecutive Sudoku, Wraparound Sudoku, Sudoku XV, Killer Sudoku X, Odd Pair Sudoku and more.

It’s pretty darn awesome, even if I do say so myself!  It handles the screen touch events directly so it’s just as fast as running a native application on the iPad or iPhone. It also works on other devices.

Little Killer Sudoku

Little-Killer Sudoku 9×9 1 puzzle
In Little-Killer Sudoku the total of each of the diagonals in the grid, other than those 9 cells long, is given. Each number has an arrow next to it which points to the diagonal it gives the sum of, so therefore the top-left cell in this grid must be a 9 thanks to the arrow immediately below and to the left of it. Unlike in regular Killer Sudoku, there is no restriction on repeating digits in any sum.

I’ve also seen Little Killer puzzles which have an additional restriction that no number can repeat on either of the two main diagonals, but I haven’t used that rule here, so numbers can repeat. Apart from the addition of the Little Killer clues, this is a regular Sudoku puzzle.