Mate in 5 Exercise 91

White plays and wins in 2 moves https://lichess.org/rxAxkknv

1. Kf7 g5 2. Rxg5#

The analysis board does checkmate in 5 moves

1. Kf7 Ra7+ 2. Kg8 Ra8+ 3. Kh7 Rh8+ 4. Kxh8 g6 5. Rg5#

Source:

This publication is in my collection "500 chess puzzles. Mate in 5. Advanced & Expert Level."