whats wrong with queen e1?
Puzzle from actual game
Um, Kxe1?
1. Qe1+ Kxe1
2. Bb4+ Kd1
3. Re1#
but i overlooked that f1 isnt hanging after king f3

Um, Kxe1?
1. Qe1+ Kxe1
2. Bb4+ Kd1
3. Re1#
but i overlooked that f1 isnt hanging after king f3
You've still got the fork Ne5+.

oops, looks like i missed it. I was ahead in material and my opponent wasn't posing any major threats, so I wasn't really thinking about checkmate yet.
This occurred in an actual correspondence game I played: