The iPhone and iPod touch become part of the game as players tap and shake their way through 10,000 Sudoku grids with five difficulty levels. Players use the easy, straightforward touch controls to tap Regular Grid mode, or enter their favorite magazine or Internet puzzle in Newspaper mode. Tap Pen or Pencil to access the annotated keyboard and enter their selection or record options. Take advantage of helpful features including Error Checking, Hint and Candidate Numbers Auto-Fill. An in-game timer keeps the pressure on, while Stats Tracking records the number of grids solved and total time played. The high resolution, smooth animation of the iPhone delivers spectacular Japanese-themed animations. With Sudoku on the iPhone and iPod touch, the solution is at players� fingertips.