
Solution

1. Qh7+ Kxh7 2. Rxe8+ Qe4 3. Bxe4# is checkmate.
Note 1. Rxe8+? Rxe8+ gives black a tempo since the white king will be in check.
1. Qh7+ Kxh7 2. Rxe8+ Qe4 3. Bxe4# is checkmate.
Note 1. Rxe8+? Rxe8+ gives black a tempo since the white king will be in check.