1.Nf3 f6 2.Nc3

A strong move since black can't reply 2...Nf6.

Black's best reply is 2...Nh6.

The popular 2...c6 seems to be losing.

Another possible move is 2...e6 and 3.e3 will transpose to 1.Nf3 f6 2.e3 e6 3.Nc3.