Killer Sudoku

Daily Killer Sudoku: Free Printable Puzzles

A brand new, randomly generated, printable Samunamupure puzzle every day!

Current puzzle: Killer Sudoku from the archives… ๐Ÿ™‚ – Difficulty: INSANE

(click to download or right-click to save the image!)

I have been providing these puzzles for FREE since 2005. Please consider clicking this “Like” button
Clicking it will help in keeping this website free.

sudoku variants and other puzzle books
To see the solution to this puzzle click here

In the Killer Su Doku category you will find more kinds of these puzzles, including Killer Samurai Sudoku, Killer TriDoku, Killer TwoDoku and other variants. Make sure to also check the Main page of this site, because that’s where occasionally other puzzles are posted: Kakuro (Cross Sums), Jigsaw Sudoku, Outside Sudoku, CalcuDoku, Picross (aka Hanjie, Griddlers, Nonograms).

Instructions and rules:

1. All standard Sudoku rules apply.
2. Numbers in “cages” (dotted lines) must add up to the cage sum indicated for that cage.
3. Numbers CANNOT be repeated within a cage, even if it is possible by other Sudoku rules.
4. If you see an “X” across the puzzle (diagonals) it means that numbers CANNOT be repeated on those diagonals.
5. Difficulty levels in increasing order: EASY – COOL – THINKER – BRAIN – IQ – INSANE

Killer Sudoku solving techniques are explained here:

Rule of 45: Innies and Outies Cage Splitting Complex Innies and Outies, part 1 Complex Innies and Outies, part 2 Finally, if you need help with cage sum combinations, use the Killer Su Doku, Kakuro and CalcuDoku calculator. Previous puzzles are available in the archive Enjoy!

Killer Sudoku for Kindle.

$0.99. Active content Killer sudoku puzzle game for Kindle.
Available on Kindle Paperwhite, Kindle Touch,
the new Kindle, Kindle DX, Kindle 2nd/3rd generation.


  1. Cyclone
    Posted January 2, 2012 at 9:02 am | Permalink

    The daily puzzle did not update yet for January 2?

  2. Trazom
    Posted January 3, 2012 at 8:21 am | Permalink

    Still no update….Two days without puzzles….Going through withdrawal! Everything ok in the home office?

  3. Patricia
    Posted January 4, 2012 at 12:48 pm | Permalink

    I’m missing the new puzzles, too. Maybe the “home office” is taking a well-deserved holiday? I hope they’ll be back soon.

    • Posted January 5, 2012 at 6:24 am | Permalink

      Patricia, you were right, I did take a short holiday and forgot to update the daily Killer Suduko puzzles. Now I am back and the puzzles are back. ๐Ÿ™‚

      • mercedes
        Posted January 5, 2014 at 5:39 am | Permalink

        today? PLEASE ยกยก

      • Peter
        Posted January 7, 2014 at 1:32 am | Permalink

        Sorry to say, but all I can see for 3 days now is a Samunamupure puzzle dated Saturday 4th January. Can we please have the regular Killer back? Thanks.

        • Phyl
          Posted January 9, 2014 at 7:02 am | Permalink

          This is true for me too, hope our compiler is OK?

          • tdogg
            Posted January 10, 2014 at 3:59 am | Permalink

            Still nuthin’

  4. Trazom
    Posted January 5, 2012 at 8:21 am | Permalink

    Welcome back, hope you are rested. Now you see how important your efforts are to your followers. Thanks for everything…

  5. Patricia
    Posted January 5, 2012 at 11:10 am | Permalink

    Glad to see a new puzzle today. Welcome back!

  6. swtorsecrets
    Posted January 10, 2012 at 11:57 am | Permalink

    I love these sudoku puzzles. Thanks!

  7. Justin
    Posted January 10, 2012 at 11:32 pm | Permalink

    Thanks for these puzzles.

  8. Roberta
    Posted June 28, 2012 at 7:22 am | Permalink

    Did something change in the way you are posting the daily puzzle? Both yesterday and today I have not been able to view, download or save it – thanks

  9. Roberta
    Posted June 29, 2012 at 9:16 am | Permalink

    Thanks – everything seems fine again – I really enjoy these puzzles

  10. Mike
    Posted November 18, 2012 at 10:49 am | Permalink

    As requested, I have liked you on Facebook, but still no daily killer to be seen. It says to unlike and like again, but how do I unlike?

    • Posted November 18, 2012 at 10:52 am | Permalink

      Mike, just point the mouse to the “Like” button and there should appear a small “x”, which, when clicked, “unlikes” the page. Then like again. You might need to reload the page afterwards. If it doesn’t work let me know.

  11. Susan
    Posted November 18, 2012 at 2:39 pm | Permalink

    This is utterly infuriating. I do not have facebook. I do not want facebook. I will not subscribe to facebook just to get a puzzle that I used to be able to get just by going to this website. Fix it or you’ll lose a follower.

    • Frank
      Posted November 18, 2012 at 8:34 pm | Permalink

      I agree Susan – utter nonsense!

      • browndog
        Posted January 5, 2013 at 6:26 pm | Permalink

        I totally agree—this is crazy having to sign in at a certain time—i enjoy my privacy and love DJAPE, but willl never become a Facebook user.

  12. Susan
    Posted November 19, 2012 at 4:32 am | Permalink

    Monday, November 19

    This Facebook thing is not working!

    I have “”liked” and the variant still does not show, even for the first 15 minutes of the hour!

    At first the Killer showed up and I could print it, and now that does not appear!

  13. keith lomax
    Posted November 19, 2012 at 5:35 am | Permalink

    I access the puzzles from work in my lunch break – which is from 12:30 to 13:30, and facebook is blocked at work (and even if it wasn’t, I would never use it), so now I can’t print the puzzles off to take to lunch with me. Thanks!

    • keith lomax
      Posted November 21, 2012 at 5:03 am | Permalink

      DJA did email me, and said that he had changed the 15 minutes to 30. I emailed him back as this initially only applied to the main killer page and not the archive, and yesterday I was able to access the archive just after noon GMT. I thnk he has recognised mine and numerous other comments in this thread and responded – well done for taking notice of the users!

  14. Posted November 19, 2012 at 8:26 am | Permalink

    No puzzles today? All I see are ads. Also can’t get to your archive.

    What’s up?

    • keith lomax
      Posted November 19, 2012 at 9:01 am | Permalink

      DJA has chnaged the rules and you have to be a user of facebook – aaarrrgh!

      • Lloyd Snook
        Posted November 19, 2012 at 12:00 pm | Permalink

        I am a Facebook user, and I can’t access it either.

  15. Peter
    Posted November 19, 2012 at 8:59 am | Permalink

    Sorry, but with this change you will loose all people – like me – who like your sudokus but do not want to be member of facebook (for good reasons!).

  16. Ellen
    Posted November 23, 2012 at 7:03 am | Permalink

    It’s 8:04 on 11/23. Daily puzzle is not displaying!

  17. Ellen
    Posted November 23, 2012 at 7:05 am | Permalink

    8:06 and puzzle not displaying

    • Posted November 23, 2012 at 2:28 pm | Permalink

      Ellen, you need to refresh the page. Hit SHIFT+Refresh (reload). It should work.

  18. Jean Barker
    Posted November 23, 2012 at 7:35 am | Permalink

    Are you receiving payment for every new Facebook user you sign up?

    • Posted November 23, 2012 at 2:27 pm | Permalink

      No, Jean, nothing like that. In fact, I do not ask you to sign up to Facebook! I ask you to “like” my page if you are already a Facebook member. If you are not a Facebook member, you can still access the daily sudoku puzzles from :00 to :30 any hour of the day!

      • Frank
        Posted November 24, 2012 at 9:49 am | Permalink

        I tried to access the puzzle at 08:25 PDT today and it didn’t show up. The Facebook like doesn’t seem to work using Firefox. I had to switch to Internet Explorer to get the puzzle.

        DJ – I have bought 5 or 6 of your books over the years. You are going to lose a valuable customer if you continue with this Facebook nonsense.


        • Posted November 24, 2012 at 11:44 am | Permalink

          Frank, what you just described is CERTAINLY a caching issue in your Firefox. You need to “force refresh” by holding the SHIFT key while pressing the refresh/reload button.

          And like I said a couple of times already – the whole Facebook like thing will likely go away in about a month or so. So, please bear with me. Thank you!

  19. Jeff
    Posted November 30, 2012 at 5:52 am | Permalink

    I like your puzzles – well the IQ ones anyway – and wouldn’t mind paying for them. But I am not a Facebook member and don’t want to be. I can’t like them on Facebook and it’s painful if I can only go to your site for 30 minutes every hour. Please change this!

    • Posted November 30, 2012 at 5:57 am | Permalink

      Jeff, come on, please don’t exaggerate, it’s not really “painful” to visit the website during the first half hour. ๐Ÿ™‚

      Also, like I repeated many times, this “like” thing will go away, or at least will be much reduced, in about a month or so, definitely on January 1, 2013, if not before. So, please, bear with me for a little longer!

      Thanks and regards

  20. Bob
    Posted December 2, 2012 at 4:36 pm | Permalink

    I tried to view today’s Killer at 6:25pm, no luck.

    I am another avid fan of this website who does NOT use facebook. I’ve purchased all 6 killer books and 4 killer samurai books. I’m looking forward to the “facebook like thing” disappearing.

    • brown
      Posted December 7, 2012 at 9:18 am | Permalink

      I’m with you.

  21. Bob
    Posted December 2, 2012 at 5:04 pm | Permalink

    Tried again at 7:03, and the puzzle did appear. Thank you, Djape!

  22. mike
    Posted December 4, 2012 at 3:48 am | Permalink

    your web site cant tell time its 420 in the morning and last i checked that the first 30 minutes an this page will not load, like unike, nothing. Where do i find the HATE button on facebook

  23. brown
    Posted December 7, 2012 at 9:16 am | Permalink

    You will also lose me as a fan unless this Facebook thing ends!

  24. Zvi
    Posted March 24, 2013 at 5:40 am | Permalink

    Hi DJape,

    Lately your Zero Killers become very difficault (high IQ levels).
    Can you reduce some of the puzzles to low IQ and even BRAIN levels.

    Another wish is Zero Killer X puzzles, I never saw this type of puzzle in your site or books and I bought almost all of your books

    • Posted March 25, 2013 at 8:39 am | Permalink

      Uh… oh… I’m in trouble! ๐Ÿ™‚ Frank, see the comment from Susan, right below this one. And what can I do now? You ask for slightly easier puzzles, Susan is asking for more difficult ones. And how can I solve this puzzle you are presenting me? ๐Ÿ™‚

      Well, I guess I have to keep doing what I have been doing… posting puzzles of various difficulty, so everyone can choose what they prefer.

      • Zvi
        Posted March 28, 2013 at 3:53 pm | Permalink

        Hi djape

        My opinion is that your low IQand BRAIN levels Zero killers are more fun and enjoyable to solve, I think that most of the regular solvers are not able to solve high IQ levels. The advantage of your site is that is for regular solvers that wants to enjoy and spent one or two hours in the weekend to solve the puzzle.

        • Posted March 29, 2013 at 2:32 am | Permalink

          Frank, you are probably right. It is impossible to please everyone with one puzzle. I try to post something for someone.

          But I will certainly take your comment into consideration and try to post some easier Zero Killers in the future.

          Thanks so much for your attention and for your feedback, it means a ton to me!

  25. Susan
    Posted March 24, 2013 at 7:05 pm | Permalink

    I love the harder IQ Zero Killers. You have only published 1 killer puzzle ever that I couldn’t solve, and that was the last Insane puzzle.

    • Posted March 25, 2013 at 8:40 am | Permalink

      Well done Susan. I also prefer difficult puzzles myself, but I do have to publish puzzles of all difficulty, so everyone could find something suitable for them. ๐Ÿ™‚

  26. Posted June 15, 2013 at 5:00 am | Permalink

    Killer on a Saturday – nice surprise, thank you

  27. Margitta Staudte
    Posted June 29, 2013 at 5:04 am | Permalink

    Saturday, Jun 29, 2013 Solution

  28. Roland
    Posted October 7, 2013 at 12:47 am | Permalink

    The Sunday Killer Sudoku is always my weekly favorite. Yesterday’s killer Sudoku (Sunday 6 October 2013) was exceptional, the way all numbers fell in place, pure artistry! Or am I getting ahead of myself? You’re the best Djape.

    • Posted October 11, 2013 at 5:21 pm | Permalink

      Ihave trie that one 6 times and stumped. Never given up before


  29. Mike Terry
    Posted October 15, 2013 at 4:25 pm | Permalink

    Tried to buy some of your Kindle games on Amazon. Couldn’t get them. Wrote Amazon. They said they don’t work on Kindle Fire. Any chance of some that will work on Kindle Fire HD?

    • Posted October 16, 2013 at 12:55 am | Permalink

      Yes, Mike, I am working on games for Kindle Fire (HD). Not sure when it will be finished, but I will make sure to let you know! ๐Ÿ™‚

  30. enxio27
    Posted January 2, 2014 at 9:20 pm | Permalink

    Hmmm. . . Second year in a row that there’s no killer puzzle on January 2nd. Is this a trend?

    • enxio27
      Posted January 2, 2014 at 9:22 pm | Permalink

      Correction, second year, but not in a row.

    • Posted January 3, 2014 at 2:38 am | Permalink

      Looks like none on the 3rd either – hopefully nothing more serious than lengthy New Year celebrations

      • enxio27
        Posted January 3, 2014 at 10:56 pm | Permalink

        The daily variant puzzle for today is missing, too. I’ve been noticing missing puzzles more frequently in the last couple of months (end of November – early December, for instance, and Pedja’s not American). Not sure what it means.

  31. Brenda Bishop
    Posted January 5, 2014 at 3:17 pm | Permalink

    The Brain killer sudoku of Sunday 5 Jan is impossible. The top line has a 3 in two squares and a 7 in three squares. These are incompatible.

    • Posted January 5, 2014 at 6:20 pm | Permalink

      Brenda, you are almost right… except… well… this is a 10×10 Killer Sudoku! Which means you should use the 0, too!!! ๐Ÿ™‚ It changes EVERYTHING!

    • Posted January 8, 2014 at 12:57 am | Permalink

      As the puzzle hasn’t changed since Jan 4 (Saturday) I don’t know how you can be discussing the Sunday puzzle that wasn’t posted. I’ve tried liking the puzzles on Facebook but it just tells me to turn platform back on which isn’t going to happen. Tried forced refresh as suggested earlier (doesn’t help). most recently, I unpinned and closed the tab, then opened a new tab, went to the main page and linked to the daily puzzle from there. Still get Saturday Jan 4 – Brain. Thanks for all the puzzles over the years. It was fun while it lasted.

  32. Typhoo
    Posted January 6, 2014 at 3:22 am | Permalink

    Withdrawal symptoms are kicking in!

  33. Trazom
    Posted January 6, 2014 at 9:10 am | Permalink

    Is everything OK my friend?

  34. mercedes
    Posted January 7, 2014 at 5:59 am | Permalink

    No more Killers ? Ayyyyyyyy

  35. DMW
    Posted January 9, 2014 at 2:59 am | Permalink

    Most recent Killer Sudoku is January 4th.

    Most recent Killer Sudoku in the archive is for January 1st.

    Are you alive and well, Djape?

    Or are other activitoes taking priority after all these years? Understandable, but we’ll miss you.

  36. Patricia Begley
    Posted January 9, 2014 at 4:42 am | Permalink

    Still stuck on Jan 4 !! Missing your puzzles.

  37. enxio27
    Posted January 9, 2014 at 1:30 pm | Permalink

    No daily variants since 2 January, no daily killer since 4 January. This is not looking good.

  38. Posted January 9, 2014 at 5:47 pm | Permalink

    This is horrible. The withdrawal symptoms are very painful.

  39. Posted January 11, 2014 at 1:46 am | Permalink

    Samurai Sudoku has been updated today (11th) and was on Tuesday, so I think that means you are alive and well….really miss your puzzles, though

  40. Trazom
    Posted January 11, 2014 at 9:20 am | Permalink

    I’m glad to hear from Christine that you yourself are evidently ok! But I speak for everyone here when I say we miss these daily killers! Can you say a word about what’s going on?

    • enxio27
      Posted January 11, 2014 at 8:54 pm | Permalink

      I believe that Pedja maintains a small database of puzzles that are set to post automatically. From time to time he refreshes that database with new puzzles. Since the Samurais are posted only twice a week, those take longer to run out. I think it’s safe to say that, for whatever reason, he hasn’t been around to replenish the database, and thus the daily variants and the killers have run out. I suspect that the Samurais will run out before long if Pedja doesn’t come back to refill them. That is why I said previously that this extended absence of his doesn’t bode well for the future of this site. We in the online sudoku community have seen this scenario played out numerous times before. I just hope that he is well.

      • Trazom
        Posted January 11, 2014 at 9:35 pm | Permalink

        Yikes, what do you mean by “this scenario”?

        • enxio27
          Posted January 12, 2014 at 7:15 am | Permalink

          By “this scenario” I mean sudoku Web site owners and software programmers just disappearing from the sudoku scene without warning and without a word. Alive and well, but moved on to other interests, apparently. It happened with Ruud (Sudocue), it happened with Jean-Christophe (JSudoku), and with others less well known and too numerous to name.

          I guess it’s not too surprising–the sudoku “craze” is mostly over, and only the die-hards are left. I’m not sure there was ever a lot of money in it. Most of those who produce puzzles and sudoku software do it because they themselves enjoy it.

          I wish Pedja well, whatever he decides to do. He has been one of the more prolific puzzle producers over the years, and for that I’m grateful. There are many good puzzles out there on the Internet if you know where to look (and many more still being produced), and several good programs (including Ruud’s and Jean-Christophe’s) that generate puzzles.

    • enxio27
      Posted January 11, 2014 at 8:57 pm | Permalink

      I see that Pedja posted here on the 5th, which confirms that he is alive and well. The question remains, however, whether he intends to continue posting new puzzles to this site.

  41. enxio27
    Posted January 20, 2014 at 10:06 am | Permalink
    • mercedes
      Posted January 21, 2014 at 5:59 am | Permalink

      Txxx, please djape, come back to daily puzles ยกยกยก

  42. Nate
    Posted May 2, 2014 at 2:10 pm | Permalink

    Can anyone provide a hint for attacking the “2308329” puzzle?

    Just the first big step, as am just not seeing it, thanks

    • AWi
      Posted May 28, 2014 at 9:16 am | Permalink

      The 7 in line 8 only goes to position 2 in this line.

      • Nate
        Posted June 2, 2014 at 5:22 pm | Permalink

        Thanks, but I don’t see how you can eliminate 7 from position 3,4,5 of line 8. I see that 9 must be in one of those three positions, but not how to exclude 7

        • LeFreak
          Posted June 3, 2014 at 1:03 am | Permalink

          Those three sum up to 23 (because of “rule of 45” used on rows 8 and 9). Thus only 6,8 and 9 can be in these three. No 7 there.

          • Nate
            Posted June 3, 2014 at 3:44 pm | Permalink

            Thanks so much ๐Ÿ™‚ I started it using the “rule”, regretfully I added 6+26 and got 34 yielding a sum of 21, sigh. Its clear upon checking my math that I goofed. Thanks so much, I’m on my way, appreciate the tips ๐Ÿ™‚

5 Trackbacks

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.

  • Meta

eXTReMe Tracker
%d bloggers like this: