White to Play – Mate in 2

Comments on lichess.org/@/scala/blog/white-to-play--mate-in-2/zRFwUxY0

The queen is pinned so there is no Rd4+
To prevent Rd4, Nf3 and Bb2 must be used.
The knight on e2 is overworked.
The answer is Rf4!

Nxf4, Bb2#
Nd4, Nf7#
f5, Qg7#
Kd4, Qxd6#
else, Nf3#