Fill in the vertical numbers horizontally. Requires 1 to 9 unique patterns. Perfect gift for that special someone Sudoku Easy - Hard equals super-sized fun! Each features just one puzzle, and each puzzle features large numbers and ample space for writing in the possibilities. This is literally the next BIG thing in sudoku Brain Games:sudoku 1 puzzles are sorted into 4 levels of difficulty. The app s introduction offers helpful tips and techniques for solving the puzzles, starting with the process of elimination. As you work through the sudoku puzzles, you will uncover your own techniques for solving them unique sudoku puzzles 4 difficulty Levels – easy, medium, hard, very hard Includes answers for every puzzle (but no cheating!) Hours of entertainment