The subgenre of the Giallo is one that I personally have always found to be incredibly underrated, as far as the influence that it's had in horror in general. Personally I've always felt as if the Giallo was the smarter cousin of the slasher film, and What Have you Done to Solange is one of the glaring examples of this. Solange is a sleek, intelligent film that constantly has you guessing the entire way. The twists aren't as far fetched as in most of its contemporaries, and manages to keep everything a mystery until the last act.
What Have You Done to Solange is a morality tale about a school teacher who is romantically involved with one of his female students. As they are out for a romantic boat ride the girl notices a girl running from a knife wielding killer. After this happens someone starts running rampant through the girl's school taking out students one by one. As the murders start piling up the teacher himself gets further and further involved into murder, mystery, and mayhem. Director Massimo Dallamono does an excellent job at making sure the movie flows at a steady pace, keeping the movie interesting at all times. Credit should also be handed to Joe D'Amato (credited as Aristide Massaccesi) for the beautiful cinematography in the film as well. Dallamono is also responsible (at least partially with Bruno Di Geronimo) for creating this unique avant-garde story about young school girls being brutally murdered (bodies are found with a knife inserted into the vagina).
One of the more impressive things about Solange is the fact that the movie shifts moods several times from romantic to incredibly menacing and on edge in a matter of seconds. Plus, the fact that this movie is just downright ballsy in its attempt in its subject matter. We're talking underage girls being murdered in an sexual manner, and Catholic school girls are the target. That's something that I think makes this film not only underrated, but very significant in the subgenre of Giallo itself.
Overall I would have to classify Solange as a can't miss Giallo that's intelligent, violent, and much different from the other films that fall into its category. It's a staunch negative look at murder in a way that many films can't comprehend. HIGHLY RECOMMENDED.
Rating - ***1/2