Questions
How do you play sudoku?
Fill the grid so that every row, column and 3×3 box contains each digit from 1 to 9 exactly once.
Is there a new puzzle every day?
Yes. Each level has its own daily puzzle, and it changes at midnight in your local time. New puzzle gives you a random one whenever you like.
How do notes work?
Turn on Notes with the button or the N key, then pick digits to write small candidates in a cell. When you place a correct digit, it is removed from the notes in its row, column and box.
Does the game end after 3 mistakes?
No. The counter only shows how many wrong digits you entered, and you can keep playing until the grid is complete.