This is a solid report, you have convinced me that you watched the film. In the first sentence of the second paragraph you have a slight issue with a disconnected antecedent. B+

See also "Return from the Ashes" (1965) starring Ingrid Thulin and the beautiful but dangerous Maximilian Schell. https://en.wikipedia.org/wiki/Return_fro…

(It looks like "Phoenix" is not a remake of the previous movie, but a separate adaptation.)

@2 Sounds like they took the story in a completely different direction. Few things in the synopsis--chess, stepdaughter, drowning, etc.--appear in the Petzold film.

@3 I wouldn't use the word "revenge" to describe what happens at the end. It's more subtle than that, but also more devastating for what isn't said/done.