There were quite a few comments from our visitors, especially on the Daily Killer Sudoku page, which makes that and other pages load slow. Therefore, I have moved some of the old comments to this new category.
If you’d like to read what other people had to say about our puzzles you may find the old comment by clicking on the “comments” link below or here.
UPDATE (some 5 years later): I reopened the comments on all pages. Feel free to add your comments there, it means a lot to me!
i don’t think its possible either. I took all the sudoku rules into account, so no same number within each sub-box. I redid this puzzle twice and can’t solve it.
Last Friay’s IQ took me 3 tries to complete, this week’s killers took me 1 try each to complete, but so far I have failed 5 times to complete Thursday’s Easy. Is it just me or over confidence?
Mike Japan
I don’t think the rating of EASY was true, unless it is another language for SUPER IQ. It took me 30min to complete and it IS possible to do. Just keep at it.
krazi, mike and Simon, check the explanation that I just posted here: http://www.djapedjape.com/?p=86
Thursday’s Easy puzzle doesn’t require any fancy solving techniques – that’s why it’s easy. It does require finding some “unusual” innies/outies.
And of course look at the solution here:
http://www.djapedjape.com/?page_id=19
Cheers!
Thanks for the “insane” puzzle – am looking forward to getting going on it this evening! The Times has been publishing pretty easy Killers for the past few weeks so it’s great to get a chance to really get those brain cells working. Cheers! 😀
I sat down with today’s insane, frankly without a hope as I have got stuck on the brain killer a few days ago. Got it cracked in an hour, and am celebrating with a beer!! Even after using innies and outies, I still have to do a fair amount of cage splitting…am I doing it right, or is there a simpler way?
are you sure your grading of insane for 28th was correct as it seemed to easy to solve.
How do you rate the difficulty. I really struggled with a couple of the “Thinkers” recently, but did today’s “Insane” no probs.
The insane wasn’t difficult. I rate last Friday’s IQ and yesterday’s Easy as more difficult.
Mike Japan
Don’t think Fridays killer was insane but enjoyed it otherwise.Still the best puzzles.
Hey, I got really stuck to the killer sudoku. I thought the insane would be difficult and so I logged my doings while I solved the puzzle by hand. In fact it was not very difficult :-/
Anyways, I had a good time solving it!
Without doubt the best killer site around.
Any chance of a weekend killer samurai with answers the following weekend?
Mike Japan
Couldn’t agree more Mike – maybe a really really difficult one. I need my Killer ‘fix’ at the weekend too.
I am having great difficulty with your web site for Killer Sudoku – I keeep clicking on Sample puzzles and Archives and just keep getting the same page for October 28th. I have found a few archived puzzles but I’m sure there must be more????
It would also help if the puzzles had sensible names eg the date.
Do you not post puzzles at the weekend? (That’s why I was looking for the archives).
Susan
Susan, we don’t keep all puzzles in the archive – only those for the previous week. Too many puzzles at once aren’t recommended anyway! 🙂
We don’t post puzzles on weekends, except for the Samurai X. We do need to take a break every so often.
I’m sure you’ll get used to navigating through this website. Just keep coming and every day you’ll find a new puzzle!
DJ
Please refer to puzzles by number.
Not everyone has access every day and soem of us trawl your archives for puzzles and lose track of the dates. Also some puzzles have two numbers. It would be helpful if you could simplify.
Hope someday you will load more than the past few days.
Thanks
B
Would it be possible to post two killers each day, preferable of IQ or Insane difficulty?
Hello
I’ve downloaded the program but the killer solver option is not working. i can only solve basic ones. is that normal?
Thanks – I was confused by the list on the right of the screen which includes”September archives” and “October archives”.
Susan
Lorena, you CAN solve Killer sudokus! You must enter the design mode and enter the puzzle first. Then switch back to solving mode and solve it.
You can not generate Killer puzzles.
Great killer puzzles. Thanks for the challenge!
Would you consider two daily puzzles – a daily “easy” or “cool” for novices, and another “IQ” or “Insane” puzzle for addicts like me??
How do you construct the Killer puzzles?
Regarding the difficulty of the Easy puzzle from thursday I think the key is not knowing ahead of time what techniques are needed. I can’t remember exactly how I solved it but I didn’t even consider looking for classic sudoku deductions so early (after the innies/outies).
Monday’s was tricky but I didn’t realise it was an “X” until I’d finished it and found there were two answers – the 1s and 6s in the bottom left and bottom centre are inter-changeable.(only one answer if it’s an “X”)
Mike Japan
Excellent killer today (01_11). It took me almost two and a half hours to solve.
Wow – a tricky one today, but got there in the end – really enjoy your ‘killers’, definitely the best around, thanks. Would like more than 1 a day, too, and miss them at weekends.
I’ve got days of catching up to do… been away for an extra long weekend in Melbourne, so I’ll leave my thoughts on the ‘insane’ when I finish it. I haven’t tried one of those yet! (Thus my vote for ‘IQ’!)
Ooer – you guys are too good for me. Mondays was the first one I’ve ever had to give up on. I had 4 easy numbers and then I just stalled and couldn’t see my way round anything to put in any more.
Can anyone remember what the starting secret was please?
Thanks
Graham,
I’m guessing the 4 easy numbers were R1C89 (Row 1, columns 8 and 9) and R9C12. If not, take a look at those. Other gimmes come in R12C1 and R89C9. The so-called “Rule of 45” is in full-force on these puzzles!
You can also make some noise by searching nonets 4 or 6 and seeing what the two “orphan” squares in those nonets add to. That will give you R4C1, R4C3, R6C7, and R6C9.
Cheers!
Why the program perfect sudoku not print the schemas for sudoku killer.
Best regards
PS: You known the sudoku type “Format rooms”?
This was the first puzzle that had me beaten, too! MUCH harder than last week’s “insane”
Susan
Susan, if you are referring to puzzle 11/01 (BRAIN) the key to solving it is in nonet 4. First you find R6C2=3 (innie for the last four rows) and R4C8=4 (innie for rows 1-4). Then, the crucial step: R6C1=4! Why? Because no other cell in nonet 4 can be equal to 4 (I hope you see why), and one of them certainly must be 4.
From there it should be easier!
djape,
can you explain yourself a little more. i must be using another method for solveing the puzzles, which has worked until nov 1 brain – still wroking on it. it took me a while to figure out taht r6c2 was 3. what do you mean innie for last 4 rows. i still have not figured out why r4c8=4. can you explain or is there someplace i can read aobut this.
thanks
Cindy, check the complex innies/outies under the solving tips section (found under “categories” in the sidebar).
Basically, you don’t have to look for innies/outies just in single rows, columns or nonets. You can look for them in any number of those!
So, you put 4 rows together and the sum of all cages in them should be 4*45 = 180. If there is only one cell in those 4 rows that belongs to an outside cage – it’s an innie. So you add up all the cages from those four rows and subtract from 180. There is your innie.
thank you.. the only thing i have on my side bar is poll, overstock ad and nokia but i understand what you said. i never thought of it like that. THANKS
Cindy, on your RIGHT-HAND sidebar! 🙂 It’s there, is it not? “links”, “categories”, “archives”, firefox button, “credits” and “external links”.
Graham
Re monday’s killer, the bottom right nonet, middle left has to be 6. The innie and outie of middle right nonet has to be 16 and 16. Therefore you can get at least another 9 numbers in the bottom left area.
Mike Japan
oops! the bottom right area
Mike Japan
hi,
i’ve been following your site links, trying to download some killers from the archive, but i just keep getting sent around in circles. how to i access the archive ????
Andy, there is a link under the “links” section on the right hand side called “Puzzle Archive”.
If you can’t find it, here it is:
http://www.djapedjape.com/gallery.php
I’ve admitted defeat on yesterday’s “brain”. I think my brain cells are dying off thro’ overwork. Your tip didn’t help at all!
oops! youre right. sorry
Mike – thanks, but my error – it was the Brain one that did for me – even after further hints via Susan’s post yesterday I still struggled and eventualy petered out. I’ll try again today.
Even yesterday’s Easy took me quite a while!!
i cannot see the right hand sidebar which explains why i was so puzzled. How do i see it?
immediately after posting the previous it appeared.. Truly magic squares!
since several weeks I become more and more addicted for Killer Sudoko. At first I was eager to write a Sudoko Solver by my own. Because I am not very experienced to do such things, I roamed about the internet to find some inspiration. I found, but I found your page too. And now I spend my free time with your puzzles: I think it`s great for a while and it`s very interesting for me to observe your page becoming greater and better.
I wish you GOOD LUCK!
Zauspon from Saarbrücken (Germany)
Hi djape,
after some difficulties to download Microsoft .NET Framework 1.1, I am proud to announce that I opened your Perfect Sudoku Program without error messages by now. I was happy to see who easy it is to design a killer puzzle. But sorry, I am not able to work with it in an adequate way. Is it possible to save a puzzle which isn´t completly solved without the loss of all the work? In addition.I don’t understand to work with the frame „Show“. Please help me!
Thanks zauspon
Graham, I too found this week’s ‘Brain’ a great challenge. I’m not sure how far you’ve got, but my cracker was in column three after figuring out the right hand side of nonet 4 must total 20. That left three empty spots within column three that total six…
You know, I find that the diagonal ‘x-factor’ makes solving easier rather than more difficult as it often enables you to eliminate options clear across the puzzle that normally would not be possible.
I found multiple solutions for the puzzle 20051101_245113_BRAIN_X_97-1.png. For example, rows 2 and 3 can be:
7 8 1 9 4 2 3 5 6
6 9 2 3 8 5 4 1 7
or
7 8 2 9 4 5 3 1 6
6 9 1 3 8 2 4 5 7
There’s a similar duo of possiblities in columns 8 and 9, toggling the items in rows 1, 5, and 7.
Also, I was unable to find a solution without doing some trial and error, but that may be to me missing something.
-Cindy-
Oh, phooey. Ignore my previous comment – I just realized that the puzzle was an ‘X’ one. I forgot to factor in the diagonal limitation.
-Cindy-