Killer Sudoku by Sudoku.com

Easybrain

Contains adsIn-app purchases

About this game

Killer Sudoku will let you enjoy an exciting experience! Jump into the new Sudoku gameplay, solve tons of new challenging number puzzles, and train your brain! Install Killer Sudoku now for free!

This free Killer Sudoku app comes from the developer of the world’s most downloaded classic Sudoku puzzle – Sudoku.com. So a stellar experience, extra game quality, and endless fun are guaranteed.

Whether you’re a fan of classic Sudoku or just looking for a number game or math puzzle for a great time and mental workout, free Killer Sudoku is here for you.

Although Killer Sudoku seems a bit harder than classic Sudoku, we made it accessible for players of all skill levels. This number puzzle game comes with several difficulty levels – easy, medium, hard, and expert Killer Sudoku. This way, Killer Sudoku puzzles are great for both beginners and advanced Sudoku solvers. We have no doubt you’ll become a Killer Sudoku master in no time!

What is Killer Sudoku

Killer Sudoku is a true legend among number games and puzzles. In a nutshell, it’s a perfect blend of those fave brain-twisters Sudoku and Kakuro. Absolutely free!

This number puzzle goes by many names: Sumdoku, Addoku, Cross Sum, etc., but the rules are equally simple across the board. Your goal is to fill the grid with numbers like in classic Sudoku while making sure the sum of numbers in the cages (areas separated by dotted lines) is equal to the number in the upper left corner of that cage. Still sounds complicated? Let’s review the Killer Sudoku rules in detail.

How to play Killer Sudoku

✓ Fill all rows, columns, and 3x3 blocks with numbers 1-9 exactly like in classic Sudoku
✓ Pay attention to the cages – groups of cells indicated by dotted lines.
✓ Make sure the sum of numbers in each cage is equal to the number in the upper left corner of the cage.
✓ The basic rule of Killer Sudoku is that the sum of all numbers in each 3x3 block, row, or column always equals 45.
✓ Numbers cannot repeat within cages, a single row, column, or 3x3 region.

Killer Sudoku features

✓ Complete free Killer Sudoku Daily Challenges to compete for awards
✓ Take part in Seasonal Killer Sudoku Events and win unique medals
✓ Challenge your logic figuring out where you went wrong, or enable Auto-Check to see your mistakes
✓ Add notes if you’re not sure which number to place. Enjoy the experience of the classic paper-and-pen puzzle games.
✓ Use hints when stuck on a really hard number puzzle. Don’t bother if you’re an experienced Killer Sudoku solver.

More Killer Sudoku features

- Statistics. Track your daily Killer Sudoku progress, best time, and other achievements
- Unlimited Undo. Made a mistake? No worries, undo it in one tap
- Color themes. Select classic Light, Dark, or Sepia themes to design your own Killer Sudoku kingdom!
- Auto-save. If you get distracted and quit your Killer Sudoku game unfinished, we’ll save it for you so you can continue anytime.
- Eraser. Erase any mistakes you made in a number puzzle.

Killer Sudoku is now available on the vast majority of phones and tablets. Install Killer Sudoku for free, train your brain, and have fun along the way!

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Ratings and reviews

The daily game is fine, but any time I play the challenges, there is a significant delay between pressing a number and it appearing on the board. I find myself having to wait all the time to make the next move and it's extremely frustrating. Like I feel like I could easily have the games be less than 3 minutes, but if I'm waiting 1 second before each move, that adds 81 seconds! If I try to play by not waiting, I sometimes confuse the game and get mistakes not my fault.

An interesting twist on the Sudoku formula. The lower difficulties are a little too easy with the math and can easily done in ~5min. You can make a limited number of mistakes, but can watch ads for extra attempts. My only complaint is how frequently the ads show up. Extra life? Watch an ad. Win a game? Ad. Start a new game? Ad. Want another hint? Ad. They kill your momentum and with my ADD they kill my train of thought. TLDR: Cool Sudoku spin, but too many ads.

I like it completely! I just wish you'd change one thing: when I type a wrong number in (for example, 7) it is wrong, it still erases the "7" notes I had in other boxes of that row, column, etc. Then I think oh there's only one number there so I type it in and get two errors for the price of one! No biggie, but it would greatly help! Thanks!

What's new

We hope you enjoy playing Killer Sudoku. We read all your reviews carefully to make the game even better. Please leave your feedback on why you love the game and what you'd like to improve. Keep your mind active with Killer Sudoku!