Sudoku is a "logic-based number placement puzzle" game. The object of the game is to fill a 9x9 grid with digits so that each column, row, and 3×3 sub-grid contains all of the digits from 1 to 9.

How to play:
- Start by selecting a puzzle
- There are four difficulty levels
- There are 125 puzzles per difficulty level
- Select an empty cell on the game grid
- Tap the digits below the grid - they'll appear in the selected cell
- Repeat to fill in all empty cells
- Guess the correct digits and you win!