Sudoku by Staple Games

Choose a difficulty or start the Daily Challenge to begin a new 9x9 puzzle. Tap a cell and enter numbers 1-9 to complete rows, columns, and 3x3 boxes without repeats. Turn on Notes to pencil in candidates, then refine them as you eliminate possibilities. Use logic techniques such as singles, hidden singles, and candidate elimination to progress. Enable hints or error check if you get stuck, and use undo to correct mistakes without stress. Finish the grid, improve your best time, and keep a streak by playing offline anytime.