K7/5R2/5R2/P4p2/8/8/1p3r2/k7 w - - 0 1
David, sorry, but that line after 5.Rf8 is a draw. Try again. This is a tough puzzle to work out, and not nearly that easy as you describe above.
- Rb6! b1=Q, 2. Rxb1+ Kxb1,
- a6 f4, 4. a7 f3, 5. Rf8! Rh2, 6. Rxf3
Rb2, 7. Rf8 Ka1, 8. Rb8 Rc2, 9. Kb7 Ra2,
- a8=Q Rxa8, 11.Kxa8 1-0