Killer Sudoku is a number puzzle that combines the logic of classic Sudoku with simple addition. Your goal is to fill a 9×9 grid with the numbers 1 to 9 while using the sums shown on the board to work out where each number belongs.
➕ Sudoku with an Extra Challenge
The grid is divided into cages—groups of cells outlined by dotted lines. Each cage has a target sum, and the numbers inside it must add up to that total.
A useful thing to know: the numbers in every row, column, and 3×3 block always add up to 45. This can help you work out the missing numbers as you solve.
These extra clues give you a new way to approach each puzzle and make Killer Sudoku feel both familiar and refreshingly different from classic Sudoku.
📊 Difficulty Levels for Every Player
Choose from Easy, Medium, Hard, and Expert puzzles. Whether you're learning the basics or looking for a more challenging brain workout, you can find a difficulty level that suits you.
💡 Helpful Tools Along the Way
Use notes to keep track of possible numbers, turn on Auto-Check for Mistakes to spot mistakes, or use a hint when you're unsure how to continue.
🏆 More Ways to Play
Complete daily challenges, take part in seasonal events, and track your progress over time. Every puzzle has one valid solution, so you can focus on logic, strategy, and the satisfaction of completing the grid.
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