Enjoy all time favorite number-placement puzzle game, Sudoku now on your Kindle Fire device. It's fully free and can be played in 4 difficulty levels. Timed competitions are available for Sudoku experts. Further, the game offers intuitive screen play. When you did your best job, upload your score online.
Rule: Fill a 9x9 grid using digits so that each column and row & each of the nine 3x3 sub-grids include all single numbers from 1 to 9.