What is Killer Sudoku?
Killer Sudoku combines the rules of classic Sudoku with cage sum constraints. The 9×9 grid is divided into cages — groups of cells outlined with dashed borders — each labeled with a target sum. Your goal is to fill every cell so that each row, column, 3×3 box, and cage satisfies its constraints.
No initial clues are given. Instead, you deduce each number using cage sums and the rule that digits cannot repeat within a cage. It's pure logic from start to finish — a deeper challenge than classic Sudoku.
Why Play Killer Sudoku?
No given numbers — every digit is deduced through cage sums and elimination. The ultimate logic puzzle.
A new Killer Sudoku puzzle every day at midnight UTC. Same puzzle for all players worldwide.
Track your daily streak, best time, and completion rate across all difficulty levels.
Play any past date. Practice on easy days or push yourself on expert-level cages.
No sign-up, no ads. Open your browser and start solving immediately.
Fully responsive — play comfortably on desktop, tablet, or phone.