Variaton 1:
Rd8+ Rxd8
Rxd8+ Kh7
Qe4+ g6
Qb7 (position below) Kg7 Qe7
and White is winning (mating).

Variation #2:
Rd8+ Kh7
Be4+ g6
Bxg6+! fxg6
R1d7+ and Black loses the queen.