The dark cypress, a quiet village under a whirl of clouds and an expressive moon among the stars...
Undoubtedly the most famous painting in the world after Mona Lisa. And without contest my favorite one far ahead the latter.

Difficulty : ******

Tested, logical.
Don't require any specific method, but you'll need to be very, very, very focused. R7 and R11 can be some good keys, but overall, C21 can be decisive at the very end.
Good blackenage.