Happy Sudoku Game for beginners and advanced players. It have Solve sudoku puzzles, train your brain, and have fun! Happy Sudoku stimulates the mind and logics which exist in each and every one of us. Studies show that playing Sudoku improves memory, mind clarity, and can even stop and prevent brain illnesses such as Alzheimers! Therefore, there are some scientists&researchers that recommend playing Sudoku as part of our regular daily activity. Every Sudoku has a unique solution that can be reached logically. Enter numbers into the blank spaces so that each row, column and 3x3 box contains the numbers 1 to 9 without repeats. Choose any level you like. Play easier levels to challenge your brain, or try expert levels to give your mind a real workout. Find out what everybody is talking about, join this exciting 21st century world phenomena, and start playing Sudoku...