That's absolutely correct, however, the best white move after 1. ... Rc3 is amazingly 2. Bf5! (idea: Bh3; and in some critical variations the white queen protects the knight on e1 if the bishop b1 has moved away).
So can you win after:
- ... Rc3
- Bf5! exf5
- f4 Rxh2
- f3 ?