Move up where? 1. h7 Rg3+ 2. Kh4 Rg1 3. Ra6+ followed by Rh6 wins in any scenario (and is essentially the same as the solution with Ra3)
Exactly! And if Black plays 1...Rh3 instead of 1...Rg3+ you have only this winning idea with Ra6-h6. Always the same, I lose rating points for absolutely correct solution. That sucks!