1. Qh8+ Kxh8 2. Kh6 Qh5+ 3. Kxh5 Kh7 4. a8=Q 

4. d7 c2 5. a8=Q (5. d8=Q c1=Q

6. Qxg8+ Kxg8 7. a8=Q+ Kh7 8. Qf8 transfers)5... c1=Q 6. Qxg8+ Kxg8 7. d8=Q+ Kh7 8. Qf8 Qd1+ 9. Kg5 Qg4+ 10. Kf6 Qg8

4...d2 5. Qa1 c2 6. Qh8+ Kxh8 7. Kh6 Bh7 8. d7 d1=Q 9. Bd6 Qd4 9... Qa1 10. d8=Q+ transfers.

10. d8=Q+ 

10. Be5+ Qxe5 11. d8=Q+ Bg8 12. fxe5 c1=Q+ 13. Qg5 Qxg5+ 14. Kxg5 Kg7 15. b4 Kf8 

10... Bg8 11. Qg5 

11. Be5+ Qxe5 12. fxe5 c1=Q+ 13. Qg5 Qxg5+ 14.

Kxg5 Kg7 15. b4 Kf8

11... c1=Q 12. b4 

12. Be5+ Qxe5 13. fxe5 Qxg5+ 14. Kxg5

Kg7 15. b4 Kf8 

12... Qcg1

a) 12... Qda1 13. Be5+ transfers)

b) 12... Qca1/b2/c3 13. Be5+ Qxe5 14.

fxe5 Qxe5 15. b5  

13. Be5+ Qxe5 14. fxe5 Qxg5+ 15.

Kxg5 and white wins. For instance 15... f4 16. Kxf4 Bh7 17. b5 Bd3 18. bxc6 Ba6 19. Kg5 Kg7 20. h5 Bc8 21. h6 Kh7 22. Kf6 etc.