This is from round 5 of 2017 PanAm InterCollegiate Chess Championship
White to move and mate in 9
Robson vs Zherebukh
I have only found mate in 11.
1.Rg4 a52.Rxc7 e33.Rh4 e24.Rxh7+ Kxh75.Qh4+ Kg66.Rxc6+ Kf57.Rf6+ Ke58.Qf4+ Kd59.Rd6+ Kc510.Qd4+ Kb511.Rxb6#
what about:1) R x g7, R xg72) Rd8+, Qg83) R x g8, K xg84) And then the white Queen can mop up the pawns.
Vipinzamvar, why does one need to take pawns if one can checkmate?
is it possible with h4
1) h4, a5
Rg4, b5; Qe5, Qh6: h5, Qc1+; Kh2, Qc2+; kh3, Qd3+; Rxd3; e4xd3; h6, Kh7; Rxg7, Kh8,; Rxg8, kxg8, Qg7+ mate