Do you mean the generated puzzles are now harder? Because I haven't changed that at all. You can verify it here: https://github.com/alabhyajindal/sudoku/commits

Do you mean the generated puzzles are now harder? Because I haven't changed that at all. You can verify it here: https://github.com/alabhyajindal/sudoku/commits/main/index.html https://github.com/alabhyajindal/sudoku/commits/main/index.h... I am making changes based on everyone's feedback here. The game is for fun and not meant to be the best Sudoku game online. I understand that storing the puzzle is useful. I might implement it at a later time. For now, I would recommend you to refresh the page in case you get stuck on a puzzle. Thanks for your feedback!