Sudoku Pro

Sudoku is a puzzle game designed for a single player .All you need to do is fill in the grid while making sure that each row, column, and region or block of squares contains each digit exactly once. -- Features -- - There are 4 levels of difficulty from easy to expert . - if you are not sure , use the pencil to mark the box number . - Unlimited number of undo . - Play offline , it's not require a network connection . - Clear and simple design . - Don't forget the hint button if you are stuck . - Eraser. Get rid of all mistakes .