I endorse both Dave and Alena's lines

Crap, the renumbering is still occuring.

I would play e5 here without much thought:

1. ..........e5

2. Rd5? Rc3! will win a rook after 3.Rd3 f4+. The alternatives aren't a lot better:

3. ...........e5

4. g3 f4+

5. Ke4 f5+ again drops the rook. Best is probably the retreat to d2 with the rook.

1...e5 2.Rd2 Rxc3+ 3.Ke2 Rcc2 4.Rxc2 Rxc2+ 5.Kf3 Kb5 6.Ra1 Kxb4

1...e5, 2. g3 d4+!, 3. cxd4 f4+!, 4. gxf4 exf4+, 5. Ke4 f5+! and Black’s winning White Rook.