Sudoku with Math - Sum Puzzle

Killer Sudoku - Number Puzzle brings you thousands of Killer Sudoku puzzles to train your brain, from the makers of Sudoku - Classic Number Puzzle. If you love Sudoku, number games, math and logic puzzles, this is your next challenge.

Killer Sudoku takes everything you love about classic Sudoku and adds cages: outlined groups of cells whose numbers must add up to a target sum. It's a clever blend of Sudoku and math, also known as Sumdoku, Addoku, or Cross Sum. A fantastic daily brain workout.

🧩 HOW TO PLAY KILLER SUDOKU
- Fill every row, column, and 3x3 box with the numbers 1 to 9.
- Cages are the groups of cells outlined with dotted lines.
- The numbers in each cage must add up to the small sum shown in its corner.
- Numbers can't repeat inside a cage.
Every puzzle has exactly one solution, solvable with pure logic.

🎯 FIVE DIFFICULTY LEVELS
From Fast for beginners learning cages, up to Expert for seasoned solvers. Five carefully graded levels give a smooth learning curve with no sudden jumps in difficulty.

📅 DAILY CHALLENGE
A fresh Killer Sudoku puzzle every day. Build your streak, track it on the calendar, and go back to play any day you missed.

💡 SMART HINTS THAT TEACH
Stuck on a cage? The smart hint system explains the solving technique step by step explaining cage sum combinations, the rule of 45, and more. So you improve as you play. Or simply reveal the answer when you want.

📊 DETAILED STATISTICS
Track your best times, win rate, and win streaks for every difficulty level, and watch your logic skills grow.

✏️ NOTES & TOOLS
- Pencil notes and fast notes mode for marking candidates
- Running cage sums as you fill cells
- Unlimited undo, erase, and auto-complete
- Highlights for duplicate numbers and related cells
- Three-mistake limit to keep you sharp

📴 PLAYS OFFLINE
No internet needed. Enjoy Killer Sudoku on a plane, on the train, or anywhere you go.

Whether you're a Killer Sudoku beginner or a Sumdoku master, download Killer Sudoku - Number Puzzle and sharpen your mind with the number puzzle game logic lovers can't put down.

Recent changes:
Performance Improvements