Sudoku (Oh No! Another One!)

Sudoku is the classic logic puzzle: fill the 9x9 grid so that every row, column and 3x3 box contains the numbers 1 to 9 exactly once. No math required, just reasoning. Every puzzle has exactly one solution, and the given numbers are placed symmetrically, like the sudoku in newspapers and puzzle books. - 4 difficulty levels: easy, medium, hard and extreme - A new daily sudoku every day - Notes, cleared automatically when you place a number - Optional hints: candidates appear in a cell when 3 or fewer remain - Reveal a number when you are stuck - Highlighting of conflicts and of the row, column and box of the selected cell - Color sudoku, with colors in place of numbers - 5 themes and an optional timer - Undo, Apple Pencil input on iPad and external keyboard support - Print your sudoku or send it as a PDF by email - Play offline, no internet connection needed Fully accessible with VoiceOver: every cell, number and note is read aloud.