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by Jill on 2018-06-20 13:33:38

by C. R. Merwin on 2018-04-06 10:23:28

Hi! I absolutely love your picture Sudoku puzzles. Ever since I discovered them a few weeks ago, I cannot stop playing them. I also enjoy the variety of choices & play all but a couple of them.  
Besides wanting to thank you & sing your praises, I have a question. I just played the colored numbers Sudoku, but nothing happened once I finished the puzzle. I was quite anxious to see my time because I felt that I finished the puzzle quite quickly. However, after placing the last number on the grid, nothing further transpired. What would cause this to happen, please?  
Thank you so very much for sharing these wonderful puzzles---AND thank you for your time answering my question.

Buy link

by David on 2016-10-31 14:57:27

My name is David and I'm interested in buying a link towards our site on Pictures Sudoku. If this is possible, please, send a price suggestion and we'll look into a solution that suits both parties.  
I look forward to hearing from you.  
Best regards  

Not exactly what I was looking for

by Gimradan on 2016-04-20 21:47:29

you were interested in why people need a Sudoku solver. That one is easy answered if you are a geocacher.  
Some other people have hidden hints in their Sudokus and sometimes it's really hard to get to those hints.  
This one I have now is maybe one of the hardest Sudokus I've ever tried. It doesn't have only numbers (there are only 3 of them), but also letters and symbols you can find on your computer keyboard.  
I thought I could find a solver for this, even if I had to make a picture of every item. But no luck. I have to use my brain (if possible) or ask someone at university to help me with this.  
But thanks for your work anyways, I will come back for it if I need a "normal" Sudoku to be solved :)  

by Alex Foster on 2016-03-04 06:47:06

Hi there,  
I am interested in the possibility of getting either a discreet sponsored post with a couple of text links in, or a small homepage banner. Can you let me know rates for each of these types of advertising?  
Alex Foster

by David on 2016-02-10 11:48:46

I run a couple of Australian gaming sites and would be interested in buying a link or a sponsored article on Picture Sudoku. If this is possible, please, send me an email and we'll look into a solution that suits both parties.  
I look forward to hearing from you.  
Best regards  

Printed versions

by Kelley on 2015-10-15 22:46:41

I prefer to do the Chinese & Arabic type puzzles on paper but can't seem to get it to print with the grid lines. Any suggestions? I've also tried to copy the puzzle to put in a Word to print it that way and it won't do it.

by Stefan on 2015-09-11 09:03:28

Im interested in advertising on your site. Send me an email so we can discuss.

Alt text

by Picture Sudoku on 2015-07-01 10:14:15

Hi Mike,  
You mean to say what the images are, for educational purposes?  
My thinking is that it wouldn't work across platforms (touch screens don't hover), and so it would be cleaner to just list the images to the side, on your site.  
All the best,  

Text on hover

by Mike on 2015-06-17 13:57:00

Would it be possible to have something like an (optional) "alt" text on hovering over the full picture?  

Selection Box In The Wrong Place

by Picture Sudoku on 2015-06-03 19:26:27

If you are experiencing this, please try pressing refresh / reload a few times.  
The version on the server works fine, but your computer may have a slightly buggy copy stored from a few weeks ago, pressing it once should update this to the copy held by your internet service provider, however there's may also not be the latest version, in which case, pressing it a few times ought to clear their copy and fetch the new one from our server.

Selection box error

by Picture Sudoku on 2015-06-03 09:36:41

Can anyone who is experiencing this error please tell me what browser they are using. I've tried Safari, IE, and Chrome and Firefox on both Mac and Windows 8, and I'm not seeing the error.

by David on 2015-05-30 12:19:18

Selection box is not accessible with the cursor - it has moved. Same result on multiple computers. Are you working on it our should we find another Soduku?

by dadoucette on 2015-05-16 09:18:21

Selection box has moved away from the cursor. Can't play anymore.


by Picture Sudoku on 2015-05-14 06:18:29

1) Sorry about the downtime. It should all be running sweetly again now.  
2) The noise is because there is an alert box. It's not the site that's making the noise, it's your computer's settings.

by scott on 2015-05-05 04:46:24

How soon do you think it will be before the game is working again?

by Scott on 2015-04-27 03:39:58

Thanks in advance for finding a solution to the puzzles not working and displaying oddly. I didn't realize how much I miss not being able to play your sudokus.

by Judith Wasserman on 2015-04-26 20:04:56

Sudoku in Color doesn't work in the revised website.

by Judith Wasserman on 2015-03-08 21:58:44

A new sound has started up when I solve a puzzle. How can I turn it off, please?

Mobile Version!

by Picture Sudoku on 2014-12-05 22:51:52

OK, so until now, the sudoku interface was intended for large screens, but it will now give a different interface if you are playing using a phone.  

Of course

by Picture Sudoku on 2014-06-17 14:08:27

Sorry for the late response. Yes, please feel free to use any of the puzzles.  

looking for suduko to use in whiteboard chat with my dad

by Angela on 2014-03-07 10:21:29

I have learning disabilities and so this game has never made since to me. i would really like to try to learn it from my dad but, he is in the UK and I am in the usa. so we'll need to use an image of a puzzle in a chatroom with a whiteboard tool. I am writing to ask for permission to use one of the puzzles from your site in this way. The image would only be in the chatroom while we were playing in real time. Thank you for your time and consideration

Picture size

by Picture Sudoku on 2014-02-12 07:31:34

Hi Bill,  
You can use pictures of any size, though they'll be stretched or squashed to 60 square.  
If it's not working, please check that they are uploaded somewhere without 'leach protect'.

Not coming up, are my pics too big

by Bill on 2014-02-11 14:18:07

I got my pics down to 100 will it work if I try again to get them to 60?

Sorry it took so long

by Picture Sudoku on 2014-01-07 18:52:43

Mary, You can play it through the browser, but you can't download it as an app.  
Stacy, that's fixed now.  
Raul, that should also be fixed.

by mary kwablah on 2014-01-04 07:15:44

how do i install sudoku on my phone

cant access or make puzzles

by Stacy on 2013-10-12 16:24:28

I had made 3 puzzles for family members and was playing them all regularly until they disappeared (started coming up with the generic numbers instead of the pictures). So I stopped playing for awhile thinking there may be a glitch, I tried to make a new puzzle last night and it did the same thing, the pictures show when I am making it, but when I got to play it is just the numbers. :(


by Raul on 2013-08-26 09:55:57

I can´t solve my created sudoku because when I´m going to click on the image, another cell is selected.

by Picture Sudoku on 2013-04-08 14:24:02

More on the performance / browser choice debate graphed below:  
Unrelated source, but the economist had this to say:  
For instance, people who fill out online job applications using browsers that did not come with the computer (such as Microsoft’s Internet Explorer on a Windows PC) but had to be deliberately installed (like Firefox or Google’s Chrome) perform better and change jobs less often.  
It could just be coincidence, but some analysts think that people who bother to install a new browser may be the sort who take the time to reach informed decisions. Such people should be better employees. Evolv, a company that monitors recruitment and workplace data, pored over nearly 3m data points from more than 30,000 employees to find this nugget.  

For class

by Roxana Jordan on 2013-03-28 18:05:15

Thanks for your reply. However, I feel dumb. I still don't understand how to find these javascripts in Amazon.

Are Apple users cleverer than PC users?

by Picture Sudoku on 2013-03-20 18:22:06

Well, unless it's related to sudoku completion times, I don't know. The differences are startling, up to 50%!:
You choice of browser seems relevant:
As does your choice of computer:

To show there's really nothing up my sleeves, and those are the bare facts, there's a Spreadsheet Here of our logs of completion times, grouped by operating system, and browser. I've even graphed the distribution for you.
I'm sure there must be heaps of mitigating factors - maybe iPad users are slowed down by fat fingers. Maybe PC users are playing it at work and have to stop playing when the boss walks past. Just maybe there's a correlation with intelligence and IT choices.

This Apple is the Droid you're looking for.

by Picture Sudoku on 2013-03-08 13:56:03

When you browse the web, your computer tells the website a little about you - kind of like a valet travelling on ahead to tell your host what you like for breakfast, and what size bed you need (sort of). All browsers do this. It looks something like this:  
Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_3; en-us) AppleWebKit/533.16 (KHTML, like Gecko) Version/5.0/Safari/533.16  
You might (quite reasonably) assume the above 'User-Agent' is an Apple Mac - there are no clues that it's not.  
It turns out though, that the default browser on Android is telling the sites you visit that your android tablet or phone is an Apple Macintosh. Now, I could understand an Android device identifying itself as 'like iPhone' or some such so that Android users get the mouseless versions of sites intended for iphone users, but it doesn't say iPhone, it says Macintosh - the big ones with keyboards. And neither does it say 'like'. It says it's an Apple Mac running Safari.  
Did Google developers copy and paste a bit of code from Safari and forget to change that bit?  
Is it so that facebook doesn't work properly and you have to use Google+?  
Is it an in joke at Google?  
(N.B. In case you stumbled on this page looking for a work around, Android devices say the navigator.platform is Linux armv7l - which is a little vague, but different to an Apple Mac)

by Picture Sudoku on 2013-03-06 14:03:28

Ayanna, just for you:

Use Your Sudoku Code For My Project

by Ayanna on 2013-02-23 18:52:55

I want to use a sudoku with just numbers, boring yes, simple-yes! I need something that's black and your Roman numeral one but with the classic number system. I don't have any font/picture or size specifications. Can you help me?

Use Your Sudoku Code For My Project

by Ayanna on 2013-02-21 00:24:33

I want to use a sudoku with just numbers, boring yes, simple-yes! I need something that's black and your Roman numeral one but with the classic number system. I don't have any font/picture or size specifications. Can you help me?

Sorry it's been a while

by Picture Sudoku on 2013-02-12 12:52:17

Roxanna, these puzzles are made in Javascript.  
BJ, There are loads on Amazon.  
Joyous - done. There's now a picture of a white tiger instead.  


by Roxana Jordan on 2013-01-16 18:11:54

What software do you use to create the picture sodukus? I am a teacher and I could use this type of puzzles in my classroom. Thanks


by BJ on 2012-07-26 00:32:15

I am looking for a sudoku book that features sudoku in sudoku puzzles. I'd appreciate any and all the help I can get. ----------- Thank you ---- bj

by Joyous on 2012-06-22 06:48:26

I really love your picture sudoku games! I play them all the time! I was just wondering if you could change something on the animal sudoku. I'm fairly arachnophobic, so the animal one creeps me out too much to play it. Could you possibly change the spider to another animal? Anything, but a spider!

How to print?

by gigi on 2012-02-02 17:17:10

Great Sudoku game but I can't print it to play with my children - when printed comes without grid lines. Also I didn't find any button to reveal the final Solution. Can you tell how to do the print and how to see the Solution? Thanks

by Lily on 2011-03-26 22:48:14

I had never seen the picture sudoku - very cool!

Big One

by Sudoku Puzzles on 2010-10-24 07:09:04

What's the biggest puzzle in the world? I mean number of blocks; not physical size. I saw a 9x9 one cut into a field in Ireland that was physically huge - maybe holds the world record for that type of size, but I'm talking about # of blocks.

Puzzling indeed

by Picture Sudoku on 2010-07-16 18:40:05

What browser / operating system are you using?


by newie on 2010-03-03 22:36:05

Picture Sudoku is great but when when I select a pix from Selection Square,  
the whole selection square moves with my cursor. How do I stop this from happening????

by Picture Sudoku on 2010-03-02 01:15:11

Hi Kira,  
We allow other sites to sue our code to create picture sudokus on their own site. The circle / octagon one which you are referring to is one of those and we have no control over the images they use.  
Best Wishes,  

confusing shapes

by Kira on 2010-02-27 03:41:41

Hi there:  
Sorry to repeat my quiestion: Could not you change the "OCTAGON" shape for any other? It is so similar to "CIRCLE", that my eyes get confused while working in solving Sudoku.  
GRATE IDEA : I love shapes, colors, flowers & leaves much more than numbers!!! THANK YOU !!!

confusing shapes

by Kira on 2010-02-27 03:41:17

Hi there:  
Sorry to repeat my quiestion: Could not you change the "OCTAGON" shape for any other? It is so similar to "CIRCLE", that my eyes get confused while working in solving Sudoku.  
GRATE IDEA : I love shapes, colors, flowers & leaves much more than numbers!!! THANK YOU !!!

by Picture Sudoku on 2010-01-19 11:18:13

Mike, weren't you called Susan Yesterday?


by Mike on 2009-12-30 15:13:37

Hi, i am Mike and just came across your site through search. I would like to invite you for link exchange deal with my good quality sites, all having different page rank.Please let me know if you would be interested in pursuing this conversation further. And i will draft a good proposal for you accordingly.  

for your site

by Picture Sudoku on 2009-12-16 01:08:14

'how to solve sudoku', you've probably figured it out by now anyway, but please go to 'free sudoku for your site' link at the top of the page and follow the instructions there.

Shape sudoku

by Picture Sudoku on 2009-12-16 01:06:31

Kira - the shape sudoku on this site has only straight lines.

great sudoku

by how to solve sudoku on 2009-11-29 12:06:46

wow flower sudoku :) first of all I think it looks great, now just a newbie question but to add It to my website I just select click the show html button and paste that code thats shows into my page right?  
Thanks again This looks wonderful

great sudoku

by how to solve sudoku on 2009-11-29 09:12:24

wow flower sudoku :) first of all I think it looks great, now just a newbie question but to add It to my website I just select click the show html button and paste that code thats shows into my page right?  
Thanks again This looks wonderful


by Kira K.K. on 2009-11-28 08:58:14

I REALLY enjoy playing shape Sudoku, much more than numbers!!  
Observations: the "circule" and "octagon" shapes are very similar, sometimes confuse me (my eyes are not good any more).  
Thanks a lot for inventing this variety of Sudoku.  

Flowers, Sudoku, yay!

by Suki on 2009-05-11 02:00:01

Worked great with Firefox browser, very enjoyable, thank you!


by bawallish on 2009-02-13 00:09:02

I want to make a Sudoku game using photos, but want to make a collection of different sets of images and do it as a for-profit venture. Do you license the code for this (a contingency fee basis would be ideal -- I'd give you a percentage of any money the site makes)?  
You can e-mail me and I'll spell out exactly what I have in mind.

by Brenda on 2008-12-31 08:33:39

Wonderful alternative to number sudoku. I enjoy these very much.

Picture sudoku book

by Picture Sudoku on 2008-09-29 12:33:23

We don't have a book of them, but feel free to print them out. You can just click refresh to get a new puzzle. It might be worth creating one with easy to draw black and white shapes, or scans of stickers, or the less artistic kids will struggle.

by Deborah Colon on 2008-09-24 05:20:56

Do you have a book of this sudoku with pictures? I'm a teacher and I need to teach how to solve sudoku but first in pictures.

Grid size

by Picture Sudoku on 2008-09-23 10:59:33

I did look at being able to change the grid size at one stage but a smaller grid is too easy, and in a larger grid, the pictures get too small. So the grid size is 'hard wired', and changing it would add a surprising amount of complexity.  
For a fee, I could make you a custom version, but it would be quite a lot of work, and I couldn't do it in the time frame.  
Best Wishes,  

Managing Director

by Macdara Butler on 2008-09-17 01:17:10

Hi, I like what you have done with the picture sudoku. We were looking for something like this and it might just do the job. Is it possible to modify your code and alter the number of rows and columns in the game?  
I think it probably is but I am not very technical and don't know how to program. Looking at the Javascript it seems that changing the number of rows/columns will impact a lot of the code. If you could help us out that would be great. We're doing it for an educational showcase on Thursday..just one day to get it done!  
Thanks for your help  

by Picture Sudoku on 2008-01-28 22:12:55

Hi Jo,  
1) Upload some pictures to a photo sharing site, like  
2) Once you've uploaded them all - go to this page and follow the onscreen instructions:


by jo cahill on 2008-01-24 00:05:48

are you willing to share how I could create my own sudoku puzzle with my personal photos? I am trying to figure it out, but it requires more computer savvy than I have. Thanks

Difficulty level

by Picture Sudoku on 2007-11-26 20:36:19

Do you want harder puzzles, or easier puzzles? (i.e. how would you rate the average puzzle here in your scale?)  
The trouble is, Sudoku's here are randomly generated; some are hard, some are easy.  
From a given starting point, we can make it easier, but making it harder is ... erm... harder.

by Megan on 2007-11-26 03:41:01

We should be able to choose a dificultie level from 4 to 9 when we make our own sudoku. :)

I'm timing you...

by Picture Sudoku on 2007-11-21 18:29:23

I've just started timing how long it takes to complete a puzzle, together with browser infomation, etc.  
This might make for some interesting stats:  
Are users of a particular setup cleverer than others?  
Which site has the cleverest users?  


by Picture Sudoku on 2007-11-06 22:30:06

* Adding the stylesheet amendment seems to have made the IE bug go away. By that, I don't mean it's died, I mean, it goes on to the next site you visit instead of this one.  
* The program makes a sudoku grid around 99 times out of a hundred. It can time out if you get an unlucky random combination, and you have a slow machine.

Big photo selection

by Picture Sudoku on 2007-09-09 14:15:15

Pictures are now twice as large in the selection grid, by placing it in a layer above the main puzzle grid. (If that's Greek to you, don't worry about it)  
Thanks to Quirksmode for a few genius lines of script that proved very useful for this.


by Picture Sudoku on 2007-08-16 15:50:59

Puzzle Lover,
It's the piece you click that gets placed. Is that not obvious?  
Maybe it's not working for you. What do you see when you mouse over an empty square?

by Puzzle Lover on 2007-08-13 14:36:18

What is your interface? How can you tell what piece is being placed???

Internet Explorer Trailing

by Picture Sudoku on 2007-07-16 15:49:36

It turns out that we have found a bug in internet explorer. I can't find anything about it online, so it seems it's a new one.  
If you scroll the page, once the picture sudoku has loaded, you'll see it leaves a trail, rendering the puzzle unviewable, and unusable. Fair enough, you may say, that's jsut Picture Sudoku's dodgy programming you may say. so you type in another URL in the address bar. But behold, the next page you view will then have the same issue, as will any page, on any site that you view afterward. What witchcraft is this?

Flawed, but functional

by Picture Sudoku on 2007-07-05 20:03:17

Another two day project that lasted two weeks, but finaly, here it is.  
* The program doesn't always create a puzzle at the first attempt.  
* Grids are not symmetrical. When they were, there were a few too many 'clues' given. The starting grid is created by starting with grid of very few numbers, and then trying to solve it using 'easy' methods. If it can't solve it, it adds in another clue.  
* It's a bit easy for some - I'll make it harder in due course. If you add it to your site, you will automatically get the increased difficulty levels when they become available.  

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