Hi, I created a couple of sudoku with chemistry formulae to help my students become more familiar with them. However, our school network blocks your site as it is a game. I have requested it to be unblocked. That will likely take a very long time. I was wondering if I could have your permission to host your java script on my own server for the two sudoku I created? It is a brilliant resource, thanks for creating it.

mouse-over sudoku numbers?

hey! I just started playing sudoku yesterday and I am digging the fun variety your site has.  
 
however I'm finding it really annoying that the 9-grid pops up whenever you mouse over an empty space.. gotten in my way quite a few times. can you change it (or at least make an option) so that you have to click on empty spaces for the grid to pop up? and click anywhere else for it to go away?  
 
thanks for bringing us this resource <3

Puzzle no. 7495

I firmly believe that puzzle no. 7495 is the best on the website. I am going to keep this straightforward. This puzzle should be featured under the "Play another game?" featured section. Why you might ask? It is simply just the best puzzle on the website so far is all. What would you, the website creator, gain from this? Nothing really, except for the satisfaction of knowing that the front page will feature the best work. In an artist's portfolio, there are some works that are better than others, and how would you feel if someone stopped viewing your portfolio because of a couple of boring pieces? If you were to put this on the featured section and the front page, players would surely click it. This would lead to the players wanting to experience the rush of puzzle no 7495 again, and they'd continue to browse your (amazing) website for longer, searching for a puzzle that gives them even a fraction of the high that they got while playing puzzle no 7495.  
 
Feature puzzle no 7495. That is all.  
 
-Someone

Kisebb...

Üdvözlöm!  
 
Kisebb méretű táblát szeretnék beállítani, hogyan és hol tudom megtenni?  
Kicsiknek 4x4-es vagy 6x6-os táblát szeretnék saját képekkel!  
 
Köszönöm a segítséget!

Kisebb...

Üdvözlöm!  
 
Kisebb méretű táblát szeretnék beállítani, hogyan és hol tudom megtenni?  
Kicsiknek 4x4-es vagy 6x6-os táblát szeretnék saját képekkel!  
 
Köszönöm a segítséget!

Puzzles and social skills

I am working on ideas in executive function and emotional recognition. Do you have facial expression puzzles I can use with autistic patients? I teach physician assistant students psychopharmacology and was thinking about puzzles as a way to teach neurochem, neurotransmittors, neuroanatomy. Best, Mark

Way to build a base of users.

I thought of colored Sudoku independently in ~2018. It is hard to prove to some people. If you numbered your puzzles, so that people could race by entering the same puzzle number at the same time, than screenshot the solution to opponent (or a verification number with time,date,etc, then you might be able to build communities, or at the very least outside competition between known friends or challengers. E.g., I could challenge my brother, and quiet down his bravado. :)

Not loading :-(

I tried inserting the code into a Wordpress page on our site and the puzzle never loads.  
 
I'm testing in Mac Safari  
 
Suggestions?  
 
THANKS

It's working again now. If it's not working for you, you may have an old version in your cache. If you reload the page, that should sort it.

What happened to the timer?

Timer

Sorry, broke it. Fixed it.

No timer

The picture sudoku doesn't time me anymore. What happened?

I just noticed. Thanks, that was quick.

Hi HW,  
 
Yes, that was deliberate. I've changed it back.  
 
S

Hi Simon,  
It is probably because of your update on the timer counter but today in Firefox the 9 choices do not appear anymore when hovering above an empty square until clicking on the square. This means many more mouse clicks and a much slower user experience and it is much more fatiguing.  
I much preferred the previous interface.  
Many thanks for your work on this site, none the less!  
HW

Timing

I've changed the way the timer works so that it only counts time on the screen. If you go to a different browser tab and do something else for a while, or your device goes to sleep, the timer will pause.

Hi LP,  
 
Thanks for your feedback.  
 
Some times I take notes based on probability - so if a 2 is more likely than a 1 I might write 2 1 instead of 1 2.  
 
All the best,  
Simon

Picture notes — continued

Hi again. To answer your question about picture notes vs number notes, let me first repeat something my son said when he was a little kid, around 2nd grade. (Now he’s a Quant who earns 4-8 times what I do, depending on his bonuses.). After I showed him Sodoku number puzzles, some time later he said to me, “They’re not number puzzles, you could put in a picture of a number and it would be the same. They’re picture-rule puzzles... no, they’re position-rule puzzles.”  
 
Your website is a living example of that. I happen to like your flower puzzle best. When I play with Sodoku I’m always doing it against the clock so using a minimum set of rules works best. If I have to apply advanced rules like Swordfish or XYZ-wing an so on, it takes too long — and they can’t be done without notes. At the previous level I could beat 5:30 about 10% of the time, never using clues or notes. That was a challenging threshold that was fun and didn’t burn a lot of time. Now, that threshold is triple without clues and notes are pretty much required just using the most basic and simple rules. Thankfully you’ve now included notes, which gets back to the position-rule comment.  
 
When doing a “number” Sodoku puzzle one can scribble in notations of numbers in a square. Even though they’re not symbols with mathematical meanings like in a Kenken or Kakuro puzzle in which arithmetic is applied, they’re not random symbols. We instinctively treat these with a certain order. For example, if we have a column where 2 and 7 fit into two unsolved squares, we’ll scribble in 2 7 and 2 7 in each square, not backwards (7 2) or scrambled. The order matters, which is another way of saying “position” matters. But position becomes essential with three or more “numbers.” We can’t make sense of random notations within a square, so we instinctively divide up the empty square and put a “1” notation at the upper left corner, a “3” notation at the upper right, “6” lower left, “9” lower right — you get the point and now see the issue picture notes.  
 
Having two picture notes in random order per square scattered throughout the puzzle can still help, but the helpfulness is partly undone by their positions being scrambled. Having more picture notes per square becomes practically useless as more are added in a non-ordered way. Their order is based on when one initially places them, but the rationale for that placement disappears as the puzzle solving advances so the notes become chaotic and one might want to reorder the picture notations just to *see* the notations.  
 
The fix is straightforward: the position of the picture notes within a square should be fixed. You challenge is to add code for the flower puzzle in which you’ve devised an internal grid where the fushcia is always upper left, white chrysanthemum upper right, blue verbena lower left, etc. And so on for the animal puzzle, landscape, Arabic, Roman, etc, etc, and of course, your “Pictures of Numbers” puzzle.  
 
One other thing you might want to add to your task list, if you haven’t already started, is to wipe the history of the #/myresults.htm?#?# pages to reset the clocks for the new puzzles that are harder.  
 
Again, thanks for the work you’ve put into this site!

Hi all.  
 
There is a level drop down under the puzzle. Once you've chosen, it'll remember for next time. It disappears once you've placed a square. Perhaps it shouldn't?  
 
The hint button is still there but it's now a giant question mark.  
 
I'll make medium the default level  
 
Yes it's gotten blurrier. Some said it was hard to tell which squares were given.

Yikes

Hello, I play color sudoku every day and recently have noticed that it’s much harder to do, and taking a lot longer. And I’ve had to ask for hints for the first time. Vastly relieved to learn that I am not experiencing a cognitive decline! Unfortunately they are a little too hard. Is there an option to choose levels? Might be worth considering. I’d like to add that I enjoy this one visually - the colors are attractive. Thanks for creating these. They help me limber up my brain before work each morning.

-

Hi Simon,  
Just discovered the Clues button. And yes, medium is easier than hard;-)  
And for the Hard level the Notes button is indeed handy.  
Thanks

Tried the game again tonight and its no longer fun. Hate to go but other options.

I like the more challenging puzzles but can you return the hint button?

-

Hi Simon,  
Just discovered why it was suddenly so much harder to solve the puzzles and glad it is not my brain... Adjustable difficulty level might indeed be a good idea.  
One tiny point: the pictures (except the clues) seem hazier then they used to be?  
HW

Picture notes

Hi LP,  
 
Thanks for your feedback.  
 
What's the problem with picture notes that isn't a problem with number notes? Is it that they are rendered too small?  
 
I suppose a selectable difficulty level is the way forward.  
 
Thanks,  
Simon

Thank you for the note feature and the undo/redo... much needed features. And while it’s good you made it more challenging, you made it too hard. There is no limit to notes with number sudoku, so making those “harder” still allow us to solve without hints. But that’s not true with picture notes, there is a limit, and I found instances where it’s impossible to proceed without a hint. We want to do these without hints but now we can’t. :-( There has to be a compromise between 24 and 31 squares, please find it and readjust the difficulty. Thanks.

Now Harder

I've made the puzzles much harder. Instead of an average of 31 starting squares, there now an average of 24.  
 
If it's too hard for you, you can click the hint button. Hints are now a little clearer and pop up under the puzzle. If you prefer your sudokus to be easy, let me know.  
 
I've also added undo and redo buttons after showing my daughter how to do them and taking it in turns to poke the screen by accident and place a wrong piece.

Sorry about the delay. I'm back.

Hi C. I'm sorry about the delay. 2 years later... This would likely mean there's an error somewhere. Try clicking the hint button.

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

Hi,  
 
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  
David

Not exactly what I was looking for

Hi,  
 
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 :)  
 
Regards  
 
Gimradan

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?  
 
Regards,  
Alex Foster

Hi,  
 
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  
David

Printed versions

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.

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

Text on hover

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

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?

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

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

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.

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

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

looking for suduko to use in whiteboard chat with my dad

hi,  
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

Not coming up, are my pics too big

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

how do i install sudoku on my phone

cant access or make puzzles

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. :(

Sudoku

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

For class

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

Use Your Sudoku Code For My Project

I want to use a sudoku with just numbers, boring yes, simple-yes! I need something that's black and white...like 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

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

software

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

Mr

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

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?

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

I had never seen the picture sudoku - very cool!

Big One

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

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????

confusing shapes

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

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 !!!

Mr

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.  
Thanks,  
Mike

great sudoku

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

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

congratulations!

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.  
KKK.

Flowers, Sudoku, yay!

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

Licensing?

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.

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

Picture sudoku book

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.

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.

Managing Director

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  
Macdara

mom

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

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

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