Math games, Sudoku (Sudoku)

This app is a free puzzle game,
During the game, the brain can be trained to improve logical thinking, and promote brain activation.

Game mode:
Each row, each column and each palace must be a number from 1 to 9 (digital unrepeatable), the game needs to be filled with blank digital grid,
All the blanks filled completely and comply with the rules to win.

Specifications:
1. 9 x 9 grid array.
2. The game offers three difficulty.

Play Sudoku help train logical thinking ability, suitable for leisure and entertainment to pass the time.
Come and mental exercise.

Limit free, Android limitation.

Sudoku / Puzzle.