White is of course, completely winning in the puzzle shown.
The question is:
Can you find the fastest way to checkmate the Black King? White to play.
Answer can be found by highlighting between the brackets
[I got a mate in 3 moves with
1. Qf5+ Ke8
2. Nd6+ Kd8
But there's actually a mate in 2 moves! The exact continuation is
If ....Ra6 or Rh6 or g6 2. Qg8#
Any other Black moves, 2. Ng6#]