Sudoku Generator update

In response to several requests, I've added the ability to print 4 puzzles per page.

Posted by Jason Hildebrand <> Saturday Nov 12, 2005 at 5:02 PM

A great website for sudoku puzzles. Printing 4 puzzles per page saves a lot of paper. Would it be possible for you to add 2 puzzles per page to make it a little easier for older folks like myself. Thank you

Posted by: Wilf on Sunday Nov 20, 2005 at 1:25 PM

The 4 puzzle options prints very nicely but i notice that when i fold my A4 page in half, the bottom 2 puzzles are not entirely in the bottom half of the page. Is it possible to leave a little more space between the top 2 and the bottom 2 puzzles. Many thanks for your great Sudoko tool. :-) Greetings

Posted by: Koen Bruyndonckx on Thursday Nov 24, 2005 at 4:21 AM

Koen: I don't have A4 paper so it's hard to test, but I've adjusted the layout a bit -- try it out now.

Posted by: Jason on Thursday Nov 24, 2005 at 0:19 PM

OK, that solved it. Another centimeter down would have been perfect :-) but don't worry about that. Great stuff.

Posted by: Koen Bruyndonckx on Sunday Nov 27, 2005 at 4:21 AM

LOVED the sudoku generator. Helps me when i'm bored at classroom. Now what about kakuro generator.....?

Posted by: tzvika on Thursday Dec 1, 2005 at 2:17 PM

Thanks so much for making this generator. I usually print 8 at a time on both sides of one paper and i take it with me in my purse for when im on the bus or at an appointment, or just plain bored. *Tight Hugs*

Posted by: Jameela on Thursday Mar 2, 2006 at 6:53 PM

Hooray to the generator! how did you make it? and how many will it generate before repeating? anyway, it's excellent work! I can't wait to tell my boyfriend who's a Sodoku addict!!

Posted by: Lily on Friday Mar 3, 2006 at 1:58 PM

ein hallo und ein dickes dankeschön aus den niederlanden und deutschland für diesen super-sudoku-spass - sehr gute arbeit - feliciteerd ...

Posted by: wally on Monday Mar 20, 2006 at 5:41 AM

Should I ever have to guess? I get to a point on difficult puzzles where I can't figure out, logically, the next step and I guess. Then I follow through. If I guessed wrong, it becomes obvious. Is there some logic I'm missing?

Posted by: Betty on Tuesday Mar 21, 2006 at 5:03 PM

Betty: the short answer is that in some cases it is necesary to make an assumption to solve a puzzle. More info at this forum.

Posted by: Jason on Saturday Mar 25, 2006 at 3:56 PM


Posted by: Ashley Brannock on Tuesday Apr 11, 2006 at 7:02 AM

Use the "Online sudoku generator" link in the menu on your left.

Posted by: Jason on Tuesday Apr 11, 2006 at 0:02 PM

Is there anything wrong with the web? I can't generate the PDF file.

Posted by: mickeyc on Monday May 1, 2006 at 6:08 PM

Thanks for letting me know. A software upgrade caused the generator to stop working. I've fixed it now.

Posted by: Jason on Tuesday May 2, 2006 at 0:04 PM

Thank you so much. I find myself really addicted to it.

Posted by: mickeyc on Tuesday May 2, 2006 at 6:04 PM

Great Stuff thanks for getting the generator going, helps to pass a boring nightshift May the 4th be with you :)

Posted by: Neill on Thursday May 4, 2006 at 6:47 AM

I have used 4x4 and 6x6 puzzles to teach logic to children. The available puzzles for kids are poor. Is it possible for you to write a generator for kid's puzzles? Or is there a site where that has a generator? PS: I really appreciate your work and you making this generator available to all of us.

Posted by: Betty on Thursday May 4, 2006 at 7:36 PM

I just Love You!! Far out the most friendly generator on the web. I usually print 13 (*4)pages in random difficulty and try to run through it in minimum of time. In short: it saves me buckets of money also :). I love the difficult ones, 0.90+! So maybe in the near future, when you have time for it, you can make us a "verry verry (die)HARD" option. More specific difficulty levels would rock this generator even more! For the kids also ofcourse, (0.30- for 7+ years) you would have the first kid-sudoku generator! Greets from the Netherlands!

Posted by: Handyman on Saturday Jul 15, 2006 at 5:55 AM

Hallo Jason, vielen Dank für den tollen Sudoku Generator. Für meine Freundin erstelle ich immer vor dem Urlaub sehr viele Rätsel. Wenn ich die Lösungen mit ausdrucke, sind dann (bei 12 Lösungen pro Blatt) die unteren drei sehr schlecht zu erkennen, weil die Zeile "Generated by ..." die Sicht versperrt. Das ist sehr schade. Offensichtlich ist das Papierformat (215,9 x 279,4 mm) zu klein. Mit dem alten Format (210 x 297 mm) hat alles gepaßt. Da mein Wissen und Können nicht für den "Offline Generator" ausreicht (source code, python, reportlab, webware), hoffe ich, dass Du etwas ändern kannst. Bitte hilf mir und meiner Freundin. Mit freundlichen Grüßen Eiko

Posted by: Eiko on Thursday Aug 31, 2006 at 3:54 PM

Thanks for The great generator! I have passed it to my mom - an addict of sudoku and I know it will be easy for her to use and it's free! Love the fact that I can print off mulitiple pages ! LOVE IT! Thanks

Posted by: Sharlene on Tuesday Oct 10, 2006 at 2:39 PM

Hello Jason, I think your sudoku generator is excellent. I respect the work you did, it must have taken quite a lot of time to perfect the program. I wanted to ask you if I have your permission to use the Generated puzzles on my sudoku website I run. Regards Ben

Posted by: Ben on Saturday Nov 11, 2006 at 5:34 AM

Hi Jason, Great Sudoku Gen. I just recently switched to 6.10 Ubuntu Linux and as a complete newbie to Linux programming, I was hoping if you could point me in the right direction when it comes to configuration files and script writing. I am still new to the Linux file system so I still haven't figured out what files are for what and what functions they perform. I need a little help from a Linux guru on this. Sometimes the forums and wikis are good, but they don't explain the reasons behind why things are the way the are and just leave you to follow the directions word for word without understanding why you are doing it that way. Need to my next 4 puzzles. Cheers.

Posted by: Robin Banfield on Sunday Nov 19, 2006 at 8:08 AM

Howdy neighbour. I am writing from Thunder Bay,Ontario. Your generator is a sanity saver, thousands of thank you 's. Do you think Bill Gates' philanthropy is driven by an honest desire to give back to the little people or is it,as I cynically believe, just another way to ease his tax burden?

Posted by: Rory on Monday Dec 4, 2006 at 7:49 PM

Hi Rory, Actually, I've read a few articles on Bill and Melinda's visits to India and other developing countries, and I think their philanthropy _is_ driven by an honest desire to improve the world. If it were simply easing the tax burden, there are easier ways to donate money. What I don't understand is how he can reconcile this attitude with the ways in which Microsoft does business -- ways that target monopoly and lock-in, instead of ways which actually help their customers in the long-term.

Posted by: Jason on Wednesday Dec 6, 2006 at 8:23 PM

Hi there! This is the most useful site for Sudoku. Print 50 Sudokus and take them with you to solve them in the train, on the porch or on the beach. I love it. I would love it even more if it had Jigsaw Sudoku and Killer Sudoku and Killer Jigsaw Sudoku too. Now I have to look for those at and print them one for one ... Best wishes from Austria (there are no kangaroos in Austria!) Katharina

Posted by: Katharina on Monday Mar 12, 2007 at 8:33 AM

Panic!!!!! I can't bring up the puzzles on What's up!!!!!!! Distressingly yours, DCHendricks

Posted by: Diana Hendricks on Saturday Apr 14, 2007 at 9:12 AM

Thank you so very much for these free puzzles. I have turned into a Suduko freak since the last day of September 2006 when my 24 year old son died. I think this compulsion has somehow helped me during the grieving. It is amazing that I will still go into almost uncontrollable weeping for no reason now and then - like today driving home from work - this dispite my deep belief that Josiah is now completely at peace with Christ his savior. Thanx again for the puzzles. Forgive the "negative waves".

Posted by: hayre on Tuesday Jul 31, 2007 at 6:35 PM


Posted by: tmh on Thursday Sep 13, 2007 at 3:23 PM

Don't even read the name, cause you won't believe I'm real, but I am! I'm a suduko lover in Clarence, New Zealand. You probably won't believe that eithere but I'm there and watching you so give me a whole sheet of suduko puzzles!

Posted by: Raine Coryielina Mickachelle Norris on Thursday Sep 13, 2007 at 3:28 PM

ilove to answer sudoko pls allow me to print some thanks

Posted by: caloi balane on Thursday Nov 29, 2007 at 7:15 AM

Hello Jason, I am writing this from Cyprus, if you know where that is! Thanks for the sudokus, I have been using this site for years now. What I noticed lately is the difficulty degree does not work for me. I would solve a 0,85 much faster than 0.78, for example. Is there a logical explanation, or is it just different focusing levels?

Posted by: Demetris Constantinides on Saturday Apr 12, 2008 at 11:27 PM

hi i download sudoku genrator XML file but idont know the way how to execute it plz tell me

Posted by: mgaus on Tuesday Aug 5, 2008 at 12:00 AM

I loooooooooooooooooove the sudoku generator as i'm a sudoku addict! I stopped buying sudoku game books :)

Posted by: Farah on Saturday Mar 21, 2009 at 8:58 AM

Thanks for the sudoku generator. I down loaded the software also. I live in Tampa, Florida, USA. I generally have to guess at some point for puzzles above .8, but still love it. Guessing is frustrating, so I usually stick with Hard level. I wnat to study the software to see if they have a finite number os solutions that they generate puzzles from. I'm also currios if they have routines that can validate a puzzle as ligitimate (i.e a unique solution).

Posted by: John Jinkerson on Sunday Jul 19, 2009 at 4:39 PM

My most-used & favourite page! Many thanks!

Posted by: Caroline on Sunday May 2, 2010 at 10:26 AM