These are hard difficulty sudoku puzzles that have 6 puzzles per A4 sheet of paper and the solutions on an additional sheet.
![Hard sudoku puzzle at the beginning](https://www.free-sudoku-puzzles.com/wp/wp-content/uploads/2021/11/sudoku_puzzle_15-326x245.jpg)
Hard Printable Sudoku Puzzles 6 Per Page – Book 31
Printable Sudoku Puzzles Hard sudoku puzzles are a lot more difficult and are suggested for experienced sudoku gamers. These sudoku puzzles will have fewer numbers already entered. 06 Hard Sudoku Puzzles 12 Hard Sudoku Puzzles […]