- How do you play Sudoku?
- Fill the 9×9 grid so every row, column, and each of the nine 3×3 boxes contains the digits 1–9 exactly once. Use the pre-filled numbers as clues and logically deduce the rest.
- Is this Sudoku game free?
- Yes — completely free. No download, account, or login required. Open the page and start playing immediately.
- What difficulty levels are available?
- Easy (great for beginners), Medium (for intermediate players), and Hard (for experienced solvers). Every level generates a unique, solvable puzzle.
- Will the game save my progress?
- Yes. Your puzzle is saved automatically every few seconds. Close the tab and return anytime — your game will be restored exactly where you left off.
- How do hints work?
- Click the Hint button to reveal a correct digit in one empty cell. Hints are unlimited, but the count is tracked so you can challenge yourself to use fewer.
- What keyboard shortcuts does the game support?
- Press 1–9 to pick a number, Backspace or Delete to erase, N to toggle Notes mode, and Space to place the selected number in the selected cell.
- What is Notes mode?
- Notes mode lets you pencil in candidate digits inside a cell without committing to an answer — a classic Sudoku technique for tracking possibilities.
- Can I print the Sudoku puzzle?
- Yes. Use the Print button in the game controls to send the current puzzle to your printer or save it as a PDF.