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Screenshots

  • Killer Sudoku X screenshot 1
  • Killer Sudoku X screenshot 2
  • Killer Sudoku X screenshot 3
  • Killer Sudoku X screenshot 4
  • Killer Sudoku X screenshot 5
  • Killer Sudoku X screenshot 6
  • Killer Sudoku X screenshot 7
  • Killer Sudoku X screenshot 8

About Killer Sudoku X

A number puzzle game with few adverts and no charging, that you can enjoy from beginning to end!
It's constantly saving the data, so you can finish it whenever you want!

A wide range of puzzles, from easy to challenging. Puzzles for newcomers too!

There is no troublesome membership registration at all! You can play them all for free.


KillerSudoku is characterised by dotted areas called cages.

Although its basic rules are same as in classic Sudoku, there is a grouping of individual cells called a cage.
Only two rules apply to the cage.

✓ The number in top left corner is the sum of numbers in cage.
✓ The same number cannot be entered in cage.


[ Rules of KillerSudoku ]

✓ Same as Sudoku, single numbers from 1 to 9 are placed in 3 x 3 blocks surrounded by row, column
and bold lines.
✓ The same numbers cannot be placed in the row, column, block and cage
✓ Target is to fill numbers in all the cells.

There are other puzzles called SumSudoku and Sum Cross, but in general basic rules are the same.


[ Point of App ]

✓ Customisable with various settings to make it easier to do!
✓ Significantly fewer adverts than any other free game!
✓ Don't worry about how many mistakes you make! Take your time, enjoy it at your own pace!
✓ It's brain training! Math ability are very important!


Enjoy to killerSudoku Puzzles!!

What’s new

Version 1.4.2 · Updated September 25, 2026

- Bug fix

Play today's Sudoku puzzle

A quick 6×6 Sudoku every day; levels grow to the classic 9×9. A free daily puzzle from Fiplay, same board for everyone. It plays right here, no download.

More Sudoku and other daily puzzles on Fiplay →

Alternatives to Killer Sudoku X

Looking for apps like Killer Sudoku X? Here are 5 similar Android apps on Google Play. The highest rated is Killer Sudoku (4.7/5), and all 5 are free to download.

Killer Sudoku X vs. alternatives
App Rating Price Installs Last updated Compare
Killer Sudoku X – Free 500+ Sep 25, 2026
Killer Sudoku 4.2 / 5 Free 5,000+ Feb 15, 2021 Compare
Killer Sudoku 4.7 / 5 Free 100,000+ Dec 15, 2025 Compare
Sudoku Master - Sudoku Game – Free 1,000+ Feb 7, 2022 Compare
Sudoku Expert 3.4 / 5 Free 10,000+ Oct 18, 2026 Compare
16x16 Giant Classic Sudoku 3.8 / 5 Free 50,000+ Oct 29, 2026 Compare

Compare Killer Sudoku X with the top alternatives: ratings, updates, ASO score and keyword gaps →

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