Puzzle of the Day 7 November 2016 |  Find the best move

1. ... Nc4 2. Rh7+ Kg2 3. Rg7+ Kf2 4. Rf7+ Ke2 5. Re7+ Kd2 6. Rd7+ Kc3 7. Rc7 c1=R 8. Rc8 Kd2 9. Rd8+ Ke1 10. Kb3 Ne3 11. Kb4 Rc2