As we get "better" at chess, we see the board more quickly, but we may also stop seeing certain things.
In the following position, White can sacrifice his queen profitably. How?
And here's the question I couldn't answer when Mesgen Amanov told me to look for a queen sac: how many ways does White have to sacrifice his queen? I only counted three squares, and literally could not see the best move! The confusion eventually cleared.