
5 0 0  6 0 0  0 0 0
0 6 0  0 0 3  9 0 0
9 0 0  0 4 0  0 0 1

7 1 0  0 5 0  0 0 0
0 0 0  0 0 0  4 0 5
0 0 0  0 2 0  7 1 3

6 0 0  0 1 0  0 0 0
0 0 8  2 0 0  0 6 0
0 0 3  0 0 4  0 0 7

hard from Utube 
https://www.youtube.com/watch?v=VOHfg3Kwsu4 
Nice! Uses hidden (2,3,4) + Ywing to solve
