Black plays and wins in 2 moves https://lichess.org/ytjcOuXE/black
1... Rb4+ 2. Ka7 Qb6#
The analysis board does checkmate in 5 moves
1... Rb4+ 2. Kc8 Rc4+ 3. Qc6 Rxc6+ 4. Kb7 Rc7+ 5. Ka8 Qd8#
Source:
This publication is in my collection "500 chess puzzles. Mate in 5. Advanced & Expert Level."