you solve it:))) bravo i didn't see Rd7 great:)))

yes:)))

for this puzzle i thing the solution might be around the c5 square so either
Nc5 or Rxd6 but will look tomorow for them now i'm going to sleep good night to
everybody:)))

The 1.Nc5 idea is very interesting. I didn't see it myself, but I think it will work. This knight threatens three things for the next white move:
a) Simply taking the e4 rook.
b) 1...bxc5 2. Rd7! trapping the queen because of the 3.Qxf7+ threat.
c) Nxa6 forking queen and rook.

I don't find a way for black to deal with all threats at once.