White plays and wins in 4 moves https://lichess.org/wicZ67kD
- Rc4+ Qe4 2. Rxe4+ Kh3 3. Qg5 Rb1 4. Rh4#
The analysis board does a safer checkmate in 5 moves
- Rc4+ Qe4 2. Rxe4+ Kh3 3. Qg4+ Kh2 4. Re2+ Kh1 5. Qg2#
It is safer because it doesn't give a chance to receive a check.
Source:
This publication is in my collection "500 chess puzzles. Mate in 5. Advanced & Expert Level."