Hard Printable Sudoku Puzzles

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Hard Sudoku puzzle example

Hard Sudoku

For experienced solvers

These puzzles require advanced solving techniques. You'll often need patterns like X-Wing and Swordfish.

Print A4 Print Letter

Other difficulty levels

Easy Medium Hard Expert Master

PDF & printing tips

  • Choose A4 for most printers outside the US, and US Letter for standard US paper.
  • In your print dialog, set scaling to “Actual size” (or 100%) for best results.
  • You can print just one page or a page range from the multi-page PDF.