Study n°852 , Rottman , 1959

White plays and wins.

SOLUTION (not official , found by myself)

Black threatens 1…Nxf6+ followed by 2…Nxd5 and wins easily.How White can counter Black’s plans ?

1. Nc7+ Kf8 (the only square)
2. Rd8+!! Rxd8 (the only legal move)
3. e7+ Kf7 (again the only square)
4. exd8=N+!!! Kf8 (the other move , …Kxf6 , loses after Nd5#.)
5. Nce6 + Ke8 (the only square)
6. f7 + Kd8 (the only move)
7. Nxg5

1-0

Nothing can be done to counter the pawn promotion on the next move.