Nf4 is best because of the fork, whereas Ne3+ only lets the king run away.

I saw the moves (…e4 and …Qa5+), but I couldn’t connect the moves in the best way because I couldn’t see pass …e4.

Sacrifice the rook to get the queen.

Why not Bxf6? Because then the bishop can take the f6.

…Rd1+, Kxd1, …Qf3+?? 😂

I thought about Qg3, but I didn’t want to sacrifice my bishop, so I gave up the thought.
The best line is …Qg3, Nxb7, …Ng4, Qxg4, …Qxg4.

This is a example of threatening.
“Checkmate, capture, threaten.”
Because there is no checkmates, no captures, so it’s best to threaten.

I was supposed to sacrifice the rook and keep the queen.

Qf3?? What was I thinking?

It took me a long time to decide whether I should check the king with my Bishop or my queen. But now I know why should check it with the bishop. Because pawn to b4. I didn’t see it.

Nd6?! The king will eat me. What was I thinking? (xb7). I didn’t see Bb4+. I guess I was overwhelmed by all the pieces around the king.