sudoku#34_mắtto found it

[Lilycat]

http://tinypic.com/hwmzvc.jpg

[mắtto]

9 3 4 7 1 2 6 5 8
8 1 2 6 5 9 7 3 4
7 6 5 3 4 8 9 2 1
5 7 1 8 9 4 2 6 3
3 4 9 2 6 1 5 8 7
2 8 6 5 3 7 4 1 9
4 9 3 1 2 5 8 7 6
1 5 8 9 7 6 3 4 2
6 2 7 4 8 3 1 9 5