1.Nxe6!	Qxe6
1... fxe6 does not work because of 2.Qg6+ Ke7 3.Rhe1 and 1... hxg4 is met by 2.Nc7+ Ke7 3.N3d5+ winning the queen back in favourable circumstances
2.Qd4!	Nc6
3.Qd7+	1-0
After 3... Qxd7 4.Bxd7+ Ke7 5.Bxc6 Bxc6 6.Rhe1+ Black is mated
Kogan-Kotenko (1972) Correspondence