1. Nf3
is a bad move in bughouse. Nf3
intending to Ng5, Nxf7
is not good because this idea can be easily refuted.
[FEN ""]
1. Nf3 e6 2. Ng5Ne5 Qf6 3. Nxf7 Qxf7
Place the knight on g6, Qe7
, pawn on f7, Kd8
and Black king is surprisingly safe.
There are many other good options for White such as 1. e4
.