Expected difficulty Medium • Comment/E-mail if you want a solution to be published

Stipulations a) On what square was the rook on f1 at the beginning of the game? b) What color and piece is on h2 (the black circle)? Mention all pieces that can be on that square. (Just so part a is well-defined, I assure you at least one piece works.)

So here’s another one, which I should say is the best piece I’ve ever composed to date. (Yes, if this is the best piece then you know how beginner I am in compositions.) I might post some problems that aren’t composed by me, but I find interesting nevertheless…