Killer Sudoku X
Puzzle Contains ads
The world's favorite Killer Sudoku Puzzle!
- Downloads
- 824+
- on Google Play
- Price
- Free
- No in-app purchases
- Updated
- Sep 25
- 2026 · v1.4.2
Screenshots
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!!
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.
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.
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| 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 →