Hard printable Sudoku puzzles
Choose Hard when you enjoy working carefully with candidates. These printable puzzles offer a more demanding session while keeping the grid and controls familiar.
Choose the weekly pack for seven puzzles and a separate solution page. The daily sheet and compact pack do not include answers. Use the preview to check the layout before printing at actual size on matching paper.
A useful way to practice
Work through one unit at a time and check for naked or hidden pairs. A candidate elimination may unlock a single elsewhere, so follow each deduction through the affected row, column and box before searching for another pattern.
Difficulty describes our puzzle selection, not a guaranteed solving time or a promise that every puzzle needs a particular technique. Start with singles again after each elimination.