Killer Sudoku - Sudoku Puzzles

Killer Sudoku - the ultimate number puzzle that sharpens arithmetic, logic, and focus all at once.

Unlike classic Sudoku, Killer Sudoku adds cages: groups of cells where the numbers must sum to a target value. The result is a deeper, more rewarding challenge that draws players from Sudoku, Kakuro, KenKen, Sumdoku, and Addoku. Whether you are a complete beginner or a seasoned puzzle solver, there is a difficulty level built for you.

10,000+ puzzles. Four difficulty levels. Zero filler.

HOW TO PLAY KILLER SUDOKU
• Fill every row, column, and 3×3 box with digits 1-9, just like classic Sudoku
• Each cage (dotted outline) has a target sum shown in the corner - hit it exactly
• No digit may repeat inside a cage, row, column, or 3×3 box
• Every row, column, and box always sums to 45 - use that to eliminate possibilities
• Easier grids can be solved with basic arithmetic; harder ones demand advanced Sudoku techniques

KEY FEATURES
• 10,000+ hand-balanced Killer Sudoku puzzles across Easy, Medium, Hard, and Extreme
• Daily Challenge with a unique puzzle every day and a monthly medal tracker for streaks
• Auto-solver to check or unstick yourself without losing progress
• Paper-style notes for penciling in candidates
• Unlimited undo so no move is ever permanent
• Achievements and Leaderboards via Google Play Games
• Detailed statistics: best times, streaks, and completion rates per difficulty
• Multiple visual themes to match your style
• Fully playable offline - no connection needed after install
• Optimised for both smartphone and tablet layouts

WHO IS THIS FOR
Killer Sudoku suits anyone who loves number puzzles and wants a step up from standard Sudoku. It is particularly popular with fans of Kakuro, KenKen, Sumdoku, and Addoku - the cage mechanic bridges all of these puzzle types in one clean app.

Play a puzzle a day or chase the leaderboard. Either way, your brain will thank you.

Feedback and suggestions are always welcome at contact@relity.games.