Medium Level 7 (30 clues)

谜题网址: http://cn.sudoku99.com/sudoku9x9/puzzle/96277/
网站: cn.sudoku99.com

1

8

2

2

6

9

6

5

9

4

7

4

1

3

2

5

1

2

4

3

7

2

1

6

8

6

9

9

8

3