Rules
Every cage is another constraint.
Place 1–9 once in each row, column, and 3×3 box. A cage’s digits must reach its small total, and the same digit cannot repeat inside a cage.
Free playable cage puzzle
Killer Sudoku online
Use cage totals and classic Sudoku logic together. This starter puzzle has one solution, no ordinary givens, and four single-cell cages to open the first deductions.
- Grid
- 9×9
- Cages
- 29
- Cost
- Free
First move
Start with the tightest sums.
Single-cell cages are fixed. Then scan two-cell cages: 3 can only be 1+2, and 17 can only be 8+9. Cross-check those options against rows and boxes.
Controls
Tap, type, check, or print.
Select a square and use the number pad. Keyboard users can type 1–9, use arrow keys to move, and press Delete to erase. Check only flags current mistakes.