This is a simple but easy-to-use Sudoku solving game.
The Sudoku Rule:
There are 81 blocks in Sudoku puzzle, each one can be filled by one digit from 1~9, and must fit the following three rules.
1. For all block in each column, each digit can not be repeated.
2. For all block in each row, each digit can not be repeated.
3. For all block in each 3x3 block, each digit can not be repeated.
Re-generate(重生)︰
Regenerate a new Sudoku puzzle.
Revise(重來)︰
Remove all answer blocks.
Setting(設定)︰
Set the difficulty of Sudoku puzzle.
Check(檢查)︰
Check whether your answer is fitting the Sudoku rule.
