1...	e3!
Black would like to play exf2; if 2.f3 Nf2 (threat Nh3) and if 3.Qd7 Re6
2.fxe3	Qg3!
3.Kg1	Qxe3+
4.Kh1	Nf2+
5.Kg1	Nh3++
6.Kh1	Qg1+!
7.Rxg1	Nf2+
8.Kh2	Be5#
A lovely combination!
Gergey-Tsivits (1970-72) Correspondence