Solution: 1. Ne5+ Kd6! 1. ......., Kc5? 2. Nd7+ Kd6 Qf4+! Kc6 Qf6+ Kb7 Qb6+ etc.
2. Nd3! with the threat of 3. Qd7 and mate, so:
2. ........., Qf7 3. Qd4+ Qd5 Black can't move his king
4. Qf6+ Qe6 5. Qg7!! with the idea Qc7+ and Nf4+
5. ......., Qf5 6. Nf4!!Black can't take the knight, and must prevent Qc7#
6. ......, Kc5 7. Qc3+ Kb(d)6 8. Qc7#!
to here.