I am looking at Be5. If f *e5 then Nf6, threathning Qh2. You can't first take at f6 cause Qxb8, covering h2.

Any other thoughts about the position?

solution lies in a final small trick-

1.Be5!- fe5 2.Qh2! (2.Nf6? - Qc8+ sergio) 2...Qc8+ (only move - white's threatening Nf6#)

3.Kg5 Rg8+ (3...Qd8+ 4.Nf6 with mate)

4.Ng7+!! -

(4...Kxg7 5.Qh6#)

RRB:
Actually 3. Kg5 still fails due to 3. ... Qc1+.
White needs to play 3. Bd7! first and only after 3. ... Qxd7 4. Kg5 Rg8+ 5. Ng7+

Beautifully done Roberto, yeah, I couldn't figure out this continuation.

The winning plan is to play Qh2 threatening decisively Nf6+ but the problem is that the bishop b8 is "en prise" and it allows Qxb8 harrasing the queen
So the logical move is 1.Be5!!
A) 1....Qc8+ 2.QxQ RxQ 3.Bxf6+ and I believe this is winning
B)so 1...fxe5 but now the diagonal is closed 2. Qh2!! Qc8+ 3.Kg5!
and here the possible variations are
1)3...Qd8 4.Nf6+ and Qh7 mate
2)3...f6+ 4.Nxf6 idem
3)3...Kg8 4.Nf6+
4)3...Rg8+ 4.Ng7!!+ Kxg7 5.Qh6 mate!!

I simply overlooked Roberto's defence sorry!