My solution

[felezeu 1]

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

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

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

[gabriele]

r3c6 can not be 1, the cell should be yellow.
It's my fault: the rules are incomplete: in all my variant, where applicable, the "dark rule" applies: if a cell is white all its diagonal adjacents can not be smaller or bigger.