KENKEN Pro takes the typical number puzzle to the next level with a fun and challenging analytical element. The latest edition of the popular iPhone game features a streamlined interface, tons of new puzzles and a tutorial by puzzle master Will Shortz.In KENKEN players unravel the puzzle by entering the correct number within a 3 x 3 to 9 x 9 sized grid. Like Sudoku, each number can only be used on... more.