Sudoku Puzzle Game

This is the best Sudoku app in Brain & Puzzle for a reason!
You won’t be looking for a paper puzzle ever again!
With 4 difficulty levels, intuitive interface, and all the functions right at your fingertips, this Sudoku app is sure to be your favorite. Interrupted? Exit Sudoku, and the puzzle is saved exactly as you see it!
* 4 levels - easy, medium, hard, very hard
* Undo and Redo
* Pencil marks
* Auto-save
* Intelligent hints
* Real time competitions
* Top scores and History
* Submit results and track progress online
Supports: trackball, touch screen, keyboard.

key words: sudoku, puzzle, game