Endgamepuzzle - Series 120

White to move

GM_Knockout said ;

1. Nxb7!! a4
2. c6! Ke7
3. c7 Kd7
4. b6 Kc8
5. Nd8!! Bc5
6. b7+! Kxc7
7. Ne6+ Kxb7
8. Nxc5+ Kb6
9. Nxa4+ Ka5
10. Nb2 Kb4
11. Nd3+ Kxc4
12. Ne5+ Kb4
13. Nxg6 Ka3
14. Ne7 Kxa2
15. Nxf5 Kb3
16. Nd4 Kc4
17. Ke4 Kc5
18. Ke5 Kb6
19. Ke6 Kc7
20. Ke7

OR

1. Nxb7!! a4
2. c6! Ke7
3. c7 Kd7
4. b6 Kc8
5. Nd8!! Bc5
6. b7+! Kxc7
7. Ne6+ Kxb7
8. Nxc5+ Kb6
9. Nxa4+ Ka5
10. Nb2 Kb4
11. Nd3+ Kxc4
12. Ne5+ Kb4
13. Nxg6 Ka3
14. Ne7 Kxa2
15. Nxf5 Kb3
16. Nd4 Kc4
17. Ke4 Kc5
18. Ke5 Kb6
19. Kc4 Ke6
20. Kc5 f5

- Black resigned 1-0