These are hard difficulty sudoku puzzles that have 6 puzzles per A4 sheet of paper and the solutions on an additional sheet.

Hard Printable Sudoku Puzzles 6 Per Page – Book 14
Printable Sudoku Puzzles These free hard sudoku puzzles are a great way to play the game for the seasoned player. Download these free hard puzzles then print and play. 06 Hard Sudoku Puzzles 12 Hard […]