Hard Level 10 (27 clues)

谜题网址: http://cn.sudoku99.com/sudoku9x9/puzzle/400977/
网站: cn.sudoku99.com

2

4

6

5

7

2

8

1

2

3

8

1

6

9

7

1

6

9

4

7

5

3

2

1

4

2

8