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Killer Sudoku

Killer Sudoku

Studio Goya LLC

Handcrafted Killer Sudoku puzzles by the most popular Sudoku channel!

4.6 Ratings 130+ Reviews 1K+ Downloads
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About Killer Sudoku

Handcrafted Killer Sudoku puzzles by the most popular Sudoku channel!
see more about Killer Sudoku

Ratings & Reviews

4.6
130+ Ratings
  1. 5
    79+%
  2. 4
    8+%
  3. 3
    10+%
  4. 2
    2+%
  5. 1
    2+%
Write a Review
  • Another great entry with good app improvements Dec 14, 2020

    By Jdesurra
    I’ve been a big fan of the Cracking the Cryptic apps, and this one is the best iteration so far. The author line up is great with Christopher Seeliger leading off the puzzles. The killer cages are easily visible, and the themes are a good mix of colors. Like the Sandwich Sudoku app, there is a column to show possible combinations in cages for those of us who struggle with mental math. There are 40 puzzles to start, which I think will keep most solvers busy for a bit. The only downside was I was hoping there would be some little killer puzzles, but it doesn’t look like there are any. That’s a bit of a nitpick since that was never really promised, but it would have been fun to see since combo killer-little killers are quite fun. In case case, this is well worth the money. Another great addition to the CtC app collection.
    more
  • Feb 6, 2021

    By Marshall Garey
    Really tough puzzles. There's some really neat logic and it can be fun. But when I get stuck, the hints aren't always very helpful. Sometimes they can be rather cryptic (see what I did there?) and I have no idea how they came to the conclusion they did. They also tend to use run on sentences which can make it harder to understand, and I'm a native English speaker. With the puzzles being so difficult and hints not very helpful sometimes, -1 star. Still a good app.
    more
  • Not your average killer sudoku Dec 22, 2020

    By Jtersesk
    Killer sudoku is my favorite sudoku variant, and when I heard Cracking the Cryptic was releasing their own app, I was thrilled. As with their other apps, every single puzzle is hand-crafted and tested, and the creators themselves have written a series of hints for each puzzle that not only help you find the next step if you’re stuck but actually teach you techniques to improve your skills. Every puzzle in this app is absolutely extraordinary. They’ve been constructed by some of the world’s best setters. This is NOT your average killer sudoku. The logic involved is unique and exciting to find. Plus, the app has every feature I could ask for in a sudoku app: double notation, your choice of error-checking options, the ability to highlight and color, undo and redo. And specific to killer, it will add up cage totals for you, and it gives a list of all possible combinations for a given cage, and has a calculator for you to test other combinations. It’s a magnificent app, and well worth the $5. My only real complaint is the occasional typo in the hints, but it hardly mars the overall experience. Also, if there were a way to view the hint and the grid at the same time, that would be helpful.
    more
  • Feb 4, 2021

    By Andy Bryan
    Some of the hints are wrong or very hard to understand. In particular #22 Hint 1...doesnt seem to make sense to me. Still no idea why all the puzzles aren't in app rather than several. Each type could be an expansion pack then. Agree with other reviewers... Balance between fun and difficulty is not quite there. All puzzles should be open from start... Found some that were mega difficult early on and some that were far easier later.
    more
  • Another Killer App - Puzzles do not get better! Dec 16, 2020

    By Zegres
    These are the best Killer Sudoku puzzles you will ever solve. They are not created by an algorithm like so many apps, these are hand crafted by some of the best sudoku setters in the world. Each one takes you on a journey where you discover new tricks and ideas. The interface is great, the hints are very strategic and handmade as well. Just 6 months ago I was not aware of the world of handcrafted Sudoku puzzles. Now, because of the Cracking the Cryptic You Tube channel, I can’t get enough. Keep it up guys!
    more
  • Game#2 has bad cages that can’t be solved Jan 27, 2021

    By Tolator
    Lower left square has 3 cages with one space left and yet the total is already 45. So can’t solve puzzle 2, which is required to get enough stars to move to puzzle 3. Checked for updates to fix problem but none available.

No reviews available

  • Another great entry with good app improvements Dec 14, 2020

    By Jdesurra
    I’ve been a big fan of the Cracking the Cryptic apps, and this one is the best iteration so far. The author line up is great with Christopher Seeliger leading off the puzzles. The killer cages are easily visible, and the themes are a good mix of colors. Like the Sandwich Sudoku app, there is a column to show possible combinations in cages for those of us who struggle with mental math. There are 40 puzzles to start, which I think will keep most solvers busy for a bit. The only downside was I was hoping there would be some little killer puzzles, but it doesn’t look like there are any. That’s a bit of a nitpick since that was never really promised, but it would have been fun to see since combo killer-little killers are quite fun. In case case, this is well worth the money. Another great addition to the CtC app collection.
    more
  • Not your average killer sudoku Dec 22, 2020

    By Jtersesk
    Killer sudoku is my favorite sudoku variant, and when I heard Cracking the Cryptic was releasing their own app, I was thrilled. As with their other apps, every single puzzle is hand-crafted and tested, and the creators themselves have written a series of hints for each puzzle that not only help you find the next step if you’re stuck but actually teach you techniques to improve your skills. Every puzzle in this app is absolutely extraordinary. They’ve been constructed by some of the world’s best setters. This is NOT your average killer sudoku. The logic involved is unique and exciting to find. Plus, the app has every feature I could ask for in a sudoku app: double notation, your choice of error-checking options, the ability to highlight and color, undo and redo. And specific to killer, it will add up cage totals for you, and it gives a list of all possible combinations for a given cage, and has a calculator for you to test other combinations. It’s a magnificent app, and well worth the $5. My only real complaint is the occasional typo in the hints, but it hardly mars the overall experience. Also, if there were a way to view the hint and the grid at the same time, that would be helpful.
    more
  • Another Killer App - Puzzles do not get better! Dec 16, 2020

    By Zegres
    These are the best Killer Sudoku puzzles you will ever solve. They are not created by an algorithm like so many apps, these are hand crafted by some of the best sudoku setters in the world. Each one takes you on a journey where you discover new tricks and ideas. The interface is great, the hints are very strategic and handmade as well. Just 6 months ago I was not aware of the world of handcrafted Sudoku puzzles. Now, because of the Cracking the Cryptic You Tube channel, I can’t get enough. Keep it up guys!
    more
  • Amazing puzzles Feb 11, 2021

    By vandaronas
    The quality of each and every one of these hand crafted puzzles is superb. I look forward to the next update!
  • Awesome addition to CTC collection Dec 16, 2020

    By sodenver
    Fantastic app! Easy to use and lots of options to customize the gameplay. Puzzles are TOUGH, but each has a set of helpful hints that teach you tricks to learn from.
  • Feb 6, 2021

    By Marshall Garey
    Really tough puzzles. There's some really neat logic and it can be fun. But when I get stuck, the hints aren't always very helpful. Sometimes they can be rather cryptic (see what I did there?) and I have no idea how they came to the conclusion they did. They also tend to use run on sentences which can make it harder to understand, and I'm a native English speaker. With the puzzles being so difficult and hints not very helpful sometimes, -1 star. Still a good app.
    more
  • Dec 22, 2020

    By David Workman
    Warning: The puzzles in this collection are difficult! Puzzle 24 was the first one over two stars that I could solve without using the hints (and I'm not a beginner - I've actually had a puzzle I authored that was featured on the CTC YouTube channel). The chess, sandwich and thermo apps (and even miracle sudoku) were much more 'approachable' for the general audience. Not everyone in the world is at Mark and Simon's solving level, and I think a lot of people will be frustrated with this app.
    more
  • Jan 2, 2021

    By Rachel Samett
    I just completed one puzzle and my major complaint is how small the text is for the killer cage sums. I wish there was a setting to toggle that text size. I know you can click on the cage to see the amount, but it's hard to look at the puzzle as a whole on a phone screen. Besides that, love it!
    more
  • Feb 4, 2021

    By Andy Bryan
    Some of the hints are wrong or very hard to understand. In particular #22 Hint 1...doesnt seem to make sense to me. Still no idea why all the puzzles aren't in app rather than several. Each type could be an expansion pack then. Agree with other reviewers... Balance between fun and difficulty is not quite there. All puzzles should be open from start... Found some that were mega difficult early on and some that were far easier later.
    more
  • Difficulty curve too steep Jan 5, 2021

    By ConfusedSky
    One thing I’ve liked about the CTC apps is that they generally have a pretty gracious difficulty curve where you slowly get introduced to more concepts relating to the sudoku variant. Consequently, I’ve found it a bit harder to develop an intuition for this one. I felt almost completely lost after the first few. Of course I’m still learning, but I’ve had to view the hints quite a bit. I think for example after you get the 12 cage in puzzle 5 the logic is quite accessible most people would be able to figure it out. However getting that cage is a multi step process where you have to look quite a bit ahead to understand. I definitely don’t think that deserves to be a 3 star puzzle for that reason.
    more
  • Feb 12, 2021

    By Aszolus
    The app works great, but the puzzles are insanely tedious. I guess if you're really really good at sudoku, give it a shot, but if you're here because you like the youtube channel, I doubt you'll find this worthwhile.
  • Not quite there yet Dec 15, 2020

    By ahhhntz
    I’m sure the quality of these puzzles is excellent, and I look forward to trying them once the app receives a key improvement. Current the corner pencil marks do not display in the same location in various cells depending on whether or not the cell contains a cage total, making it much more difficult to scan the grid and much less satisfying to use the app. I will be happy to update my review and increase my star rating once this is fixed, but at present I cannot recommend the app.
    more
  • Dec 23, 2020

    By Mark Holden
    Good puzzles let down by readability of the grid. While I don't doubt the quality of the puzzles, the readability of the grid is a much higher challenge for me. The size of the characters used for cage totals is too small for me to see clearly regardless of the brightness or colour scheme. The higher contrast schemes wash out the grid lines to make them invisible. Turning up the brightness of the screen helps somewhat but that causes eye strain which means I can only play for a few minutes
    more

No reviews available

  • Game#2 has bad cages that can’t be solved Jan 27, 2021

    By Tolator
    Lower left square has 3 cages with one space left and yet the total is already 45. So can’t solve puzzle 2, which is required to get enough stars to move to puzzle 3. Checked for updates to fix problem but none available.

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