Too easy :) When you have seen it before :)

Truly one of the better endgame studies.

ohhhhh.... that took me a while to understand. VERY clever.

(simply driving away the rook allows Rc1!)

Why a rook? Why not a queen?

This is a puzzle that someone had posted recently. A couple people stated that it's called the Saavedra Position.

SilverPanic wrote: Why a rook? Why not a queen?

---

 It would be a draw.

Yeah, it's the Saavedra.  If white promotes to a queen, black responds Rc4+!, and white is forced to accept the draw with Qxc4 stalemate.

SilverPanic wrote: Why a rook? Why not a queen?

---

This is because if C8=Q then Rc4+ queen must capture the rook on c4 and black would be put into stalemate.  Therefore you must rook the pawn.

It's a famous study by Saavedra - very beautiful

 A tie-in to the previous problem.