Sudoku is a logic-based, combinatorial number-placement puzzle game. The objective is to fill a 9×9 grid with digits so that each column, each row, and each of the nine 3×3 sub-grids that compose the grid contains all of the digits from 1 to 9.



Sudoku is the most popular Android alternative to Sudoku Master.
Sudoku is the most popular free alternative to Sudoku Master.
- Sudoku is Free and Proprietary


