Solution

This mate in 11! solution began with the incredible Queen sacrifice to keep the initiative (else black trades Queens ie hxg6 Qxe3+).m

Qh6+! Kxh6 hxg6+ Kg5 Rh5+! Kxh5 f4+ Nxe2 Nf6+ Kh6 Rh1+ Kg7 Ne8+! Rxe8 Rxh7+ with mate next move:



This concludes the Royal sacrifice of Q+R+B+N