Mating Tactic!

This is from round 5 of 2017 PanAm InterCollegiate Chess Championship

White to move and mate in 9

Robson vs Zherebukh

Comments
No. 1-6
atulborkar
atulborkar

Rg4, b5; Qe5, Qh6: h5, Qc1+; Kh2, Qc2+; kh3, Qd3+; Rxd3; e4xd3; h6, Kh7; Rxg7, Kh8,; Rxg8, kxg8, Qg7+ mate

atulborkar
atulborkar

1) h4, a5

atulborkar
atulborkar

is it possible with h4

Alena
Alena

Vipinzamvar, why does one need to take pawns if one can checkmate?

vipinzamvar
vipinzamvar

what about:
1) R x g7, R xg7
2) Rd8+, Qg8
3) R x g8, K xg8
4) And then the white Queen can mop up the pawns.