German chess puzzle composer Herbert Ahues (1922-2015) specialized in the art of the mate in two. He composed more than 4000 chess problems and was awarded the title of Grand Master of Chess Composition by FIDE in 1989. Below is one of his final masterpieces first published in the year of his passing.
Whether you prefer racking your brain, wracking your brain or even wrecking your brain, this chess puzzle is for you. White to move and mate in two by Herbert Siegfried Oskar Ahues (Troll, 1/2001).
This particular mate in two managed to confound me for a couple of hours. I am sure if you give it a shot, you will soon see why!