Sudoku
Fill the grid so that every row, column and 3×3 box contains each digit from 1 to 9.
How to play and keyboard shortcuts
Select a cell and press a digit on the pad or your keyboard. The Notes button (press N) lets you jot down several candidates in a cell. Hint reveals the correct digit in the selected or a random cell. Use the arrow keys to move around and Backspace to clear a cell. Your progress and time are saved automatically, so you can close the tab and come back later.