Mate in 5 Exercise 36

[fernandoylet]

White plays and wins in 4 moves https://lichess.org/lVxxyh5I

1. Rb1 Rd7 2. Kxd7 Ka7 3. Kc6 Ka8 4. Ra1#

The analysis board does checkmate in 5 moves

1. Re1 Rf7 2. Re8+ Ka7 3. Bc5+ Ka6 4. Ra8+ Ra7 5. Rxa7#

Source:

https://www.amazon.com/Chess-Puzzles-Advanced-Expert-Level/dp/B0917YQZP1