Mate in 4:

wow that was more then unexcpected thxs for sharing

Brilliant thanks! (and yep i had to hit the "view solution" button ;)

A really good puzzle, thanks for sharing!

really good - I initially tried to play it the trade pieces route - to the same end  but yours was great and so much quicker -- thanks for sharing - I'd have never seen it on my own (i.e., "solution")

cool! thanks for sharing :)

Great puzzle!  

 

However, the title makes it sound like a proud parent talking about their newborn baby...

oh come on, theres nothing incredible in that, black has only one move he can play !

Actually, it's rather intricately thought out.  For example, one other try (1 Qa3 cd 2 Re2 de 3 Qxc5) fails to 3... e1/N+.