PuzzleburyPrintable puzzles
for grown-ups

Hard Sudoku

Hard puzzles stall unless you use pencil marks. Look for pairs and triples: two cells in a unit that share the same two candidates rule those digits out elsewhere.

Answers come in their own PDF so you can keep them out of sight, or choose the combined booklet with the answers at the back.

10 puzzles (PDF)Answers (PDF)Puzzles + answersJust 5, with answers

A4 by default. US Letter: puzzles · answers · combined

  1. Sudoku #0003HardPrint
  2. Sudoku #0007HardPrint
  3. Sudoku #0011HardPrint
  4. Sudoku #0015HardPrint
  5. Sudoku #0019HardPrint
  6. Sudoku #0023HardPrint
  7. Sudoku #0027HardPrint
  8. Sudoku #0031HardPrint
  9. Sudoku #0035HardPrint
  10. Sudoku #0039HardPrint

Printing tips

Every PDF is laid out for both A4 and US Letter. Choose “Actual size” or “100%” in your printer dialogue rather than “Fit to page” so grids stay square.

The puzzles are black on white with thin rules, so they print cleanly in greyscale and use very little ink. Answers come in a separate PDF, so you can print the puzzles now and keep the solutions for later.