White plays and wins in 5 moves https://lichess.org/UkpiQYHp
- Bc4+ Ka7 2. Na5 Ka8 3. Bd5+ Ka7 4. Nc6+ Ka6 5. Bc4#
The analysis board does checkmate in 5 moves
- Ba4 Ka7 2. Bb5 Ka8 3. Nd6 Ka7 4. Nc8+ Ka8 5. Bc6#
Source:
https://www.amazon.com/Chess-Puzzles-Advanced-Expert-Level/dp/B0917YQZP1