Printable killer sudoku with answers

Hard killer sudoku printable

Hard killer sudoku puzzles with dashed cages, sums and an answer page. Print them or save a PDF — a new set every time.

Quietdoku for iPhone and Android

Take the quiet with you.

The app works offline and adds the parts that make a habit stick.

  • Four daily puzzles, one per level
  • Streaks and collectible achievement cards
  • Worldwide and country rankings, seasons
  • Challenge a friend with a link
  • Sign in with Apple or Google to keep progress across phones

Scan to download

Free · No ads · Optional Pro for unlimited practice