1...f3!
2.gxf3Bxh3
3.Rg1Qh5
4.Rg5Qh4
5.Kg1
So far, all White's moves are forced. Now Black embarks on a further series of splendid forcing moves...
5...Bh2+!
6.Kh1
If 6.Kxh2 Bf1+!
6...Bf1!
7.Qd1
If 7.Qxf1 Bg3+! and mate on h2; now, if 7... Bg3+ 8.Kg1 and White gains respite, but...
7...Be2!
Closing the king's last escape route - if the bishop is captured, then 8... Bg3+ and mate in two, so White resigns
Herman-Charousek (1896)