Printable Hard sudoku
Choose a level and how many sudokus per page. Every page is new, and the solutions come on the next page.
Printable sudoku by level
About
Sudoku is a classic puzzle with a 9 by 9 grid. On this page you can print Hard sudoku puzzles for free. Every puzzle has exactly one solution, so you never need to guess. Take a pencil, make a cup of tea, and sit somewhere quiet. Fill in the numbers one by one at your own pace. Paper is a good break from screens. Each page is new, so you always have a fresh puzzle to try. No sign-up is needed, and you can start right away.
How to print
Choose how many sudokus you want per page: 1, 2, 4 or 6. You can also pick Large print for 1 puzzle per page with big numbers. Press the button Print or save as PDF. In the print window, pick your printer or choose Save as PDF. The pages are set for A4 or US Letter, in black on white. The solutions are on the last page.
Tips
Look first for rows, columns or boxes with the most numbers already filled in. Use pencil so you can erase easily if you change your mind. Write small candidate numbers in the corners of empty squares when you get stuck. Take a short break when you feel tired, and come back with fresh eyes.