Free Printables › Sudoku
Hard Sudoku Puzzles
Few clues, one solution. If you can finish these with a pen, you are good.
How to use it
Start with the row, column or box that has the most numbers filled in — that is where the fewest options are left.
Every puzzle here is generated in your browser and checked to make sure it has exactly one solution, so logic alone will always get you there. No guessing required.