Hard Level 10 (27 clues)

谜题网址: http://cn.sudoku99.com/sudoku9x9/puzzle/903393/
网站: cn.sudoku99.com

4

8

7

1

9

1

6

8

8

7

3

2

5

4

7

5

6

1

3

2

2

5

4

7

1

8

6