Smart Sudoku

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* Sudoku is the best game for training your brain. The aim of the game is to place 1 to 9 into each grid cell so that each number can only appear once in each row, each column and each mini-grid.

* This game is designed with basic colors: black, white, gray, yellow and having an interface that helps player concentrate to play. This game is suitable for sudoku beginner to sudoku expert.

* Features:

- 2 input methods: digit first, cell first

- Endless game

- 7 levels: beginner, very easy, easy, medium, hard, very hard, and expert

- Pencil marks

- Manual hints to help you complete hard ones

- Auto-save

- Load and Save