Here’s a toughie for you-and no computers allowed!
I have created this unique chess puzzle which white mates black in many different ways, all in 5 moves, no matter what black does. Options do exist for both sides.
Basically, black is trying to prolong their life as much as possible. But no matter what move they make (not like there’s a ton if options after the first 2 moves), they shall always be mated in 5 moves.
And yes, the position is legal.
EDIT: It’s come to my attention that there is much more than 9 mates in one. In this light, just find as as you can.
White To Play And Checkmate Black In 5 Moves In Many Different Ways
Good luck solving!