medium3x3.txt

3

9 1 3 | 6 x x | x x x 
2 5 x | x 8 7 | x 9 x 
x x x | x x x | x 4 x 
---------------------
5 8 x | x 4 6 | x x 7 
x x x | x 5 x | x x x 
7 x x | 8 9 x | x 5 6 
---------------------
x 9 x | x x x | x x x 
x 6 x | 3 7 x | x 2 9 
x x x | x x 5 | 3 6 4 

(Medium puzzle from www.websudoku.com)