1.Nh3 f6

The current status of this reply is quite unclear, but it seems that this move is at least suboptimal if not losing. White's most common choices are 2.Nc3, 2.e3 and 2.e4.

Another line: 2.Nf4 d5 (2...e6) 3.Ne6 Bxe6 4.Nc3 (4.e3) b5 (4...Nh6; 4...Nc6) 5.e4 (5.d3) e5 (5...Nh6) 6.Qg4 f5 and white can't play 7.Qxg7 (7...Qh4 8.g3 Qh6 and black wins).