Black plays and wins in 4 moves https://lichess.org/iIN96wt1/black
1... Rb1+ 2. Ka2 Bc4+ 3. Ka3 Ra1+ 4. Ra2 Rxa2#
The analysis board does a less aggressive checkmate in 5 moves
1... Re6 2. Rg2 Re1+ 3. Ka2 Bc4+ 4. Ka3 Ra1+ 5. Ra2 Rxa2#
Source:
This publication is in my collection "500 chess puzzles. Mate in 5. Advanced & Expert Level."