The goal of Sudoku is to fill in a 9×9 grid with digits so that each column row and 3×3 section contain the numbers between 1 to 9. At the beginning of the game the 9×9 grid will have some of the squares filled in. Your job is to use logic to fill in the missing digits and complete the grid.

Game features:
1 Sudoku puzzles level is rich simple intermediate difficult expert four levels
2 Rich themes night mode regular mode color mode arbitrarily
3 Auxiliary function is useful auxiliary check error duplicate item highlighting
4 Note function uncertain digital note record
5 Prompt function provide guidance when encountering difficulties
6 Statistical functions challenge records at a glance
 
As a digital puzzle game Sudoku does not require you to have calculations and special math skills only wisdom and focus.
Improve attention and intelligence!

Tip: There is only one answer for each Sudoku question!