Hi everyone,

I'm new to the forum. Until now I was able to solve every hard Sudoku that I tried, but now I am stuck on this one. I never learned any solving technique by hard, for this one I looked into the advanced techniques, but they all seemed like kind of what I am already applying. Of course I could be bruteforcing it, but I hope to find a more elegant method.

It would be great if someone could tell me what a next step in this state is.

Thanks in advance

Gero