Puzzle of the Day 1 September 2017 |  Find the best move

1. Kf6 Rf1+ 2. Ke6 Bf5+ 3. Kd6 Rg1 4. g7 Kh4 5. Re7 Bc2 6. Nf6 Bb3 7. Ke5 Re1+ 8. Ne4 Bg8 9. Kf4