Ultimate Sudoku

Use Ultimate Sudoku as a brain-training tool by challenging yourself to complete a variety of sudoku puzzles as quickly as possible. The game is playable at three skill levels: Beginner, Intermaediate and Advanced. Once you've decided on a difficulty that's appropriate for your skills and goals, you can begin playing. Fill in the blanks using the numbers 1 through 9. Each digit can occur in a row, column, or 33 box exactly once.

Having a timer that constantly watches your moves adds a dramatic element to the game. Demonstrate your superhuman puzzle-solving skills by completing challenges as rapidly as possible. If there is a blank space that needs to be filled, you can just click on it and type the appropriate number in. In addition, the game's options menu has access to more tips, puzzle solutions, and full-screen mode. There's a lot of cool stuff out there, just waiting to be found by you. If you like puzzle games, you can play more Sudoku Challenges.

Tap and enter the number you solve.