Mate in one move.

Here is a mate in one I have composed. Please write your solving time and your rating but without giving the solution.

White to play and mate in 1.

5 seconds rating is around 1600-1700 uscf

Only 5 seconds ?
I'have showed this problem to several players better rated and they needed much more time.
Congrats if you are not wrong.

I took about 30 seconds, rating 2000

takes a while looking at all of the pieces to find which one can checkmate...

EDIT: didn't even get it lol! thought Qb5 was mate, didn't see the pin

further edit: got it, about 90 seconds

1200ish. 40- 50 seconds.

1848, but I think my rating is a fluke, had some timeouts---think I got it, but only after I looked away from frustration then looked again, then thought I had it then was about to give up, not over 2 mins  of actual contemplation tho.  I STILL love your picture Elodie, and I think if I got it right you should send me an enlargement(LOL,I can dream can't I?)

10 seconds, 1700

30 seconds, don't have an official rating, around 1100-1300 here.

Just depends on which piece you start looking at.

about 90s, 2000 rating.

harder than it looks - give it 67 seconds at a 1257 rating

30 secs. Rating 1150.

Flawed!!! Qa1# or Rxe2!!!!!

!!!

Whoops, R takes  a2 doesn't work, but still 30 secs.

Wow... nice problem.

23 possible checks if I counted correctly.  The only White piece that can't deliver check is the pinned rook.  And both of black's "pinned" pieces actually have to move in some of the lines.

20 seconds, but to be fair half of that was spent finding the king