1.Ne3+!	Kg3
2.Qg4+	Kf2
3.Qf4+	Ke2
4.Qf1+	Kd2
The knight is untouchable: 4... Kxe3 5.Qe1+
5.Qd1+	Kc3
6.Qc2+	Kb4
Otherwise the white knight forks on f5
7.Qb2+	Nb3
7... Ka5 8.Nc4+ leads to an elementary mate
8.Qa3+!!	Kxa3
9.Nc2#
Kubbel (1925)