Hard Level 10 (27 clues)

谜题网址: http://cn.sudoku99.com/sudoku9x9/puzzle/514207/
网站: cn.sudoku99.com

3

4

9

1

5

8

4

7

4

8

6

7

2

6

1

6

5

3

7

4

8

5

1

1

7

9

4