A Bran new chess puzzle

White to play mate in 4

hi good one!

Thanks my friend.

SOLVED IT!

Oh no, wait. Wait. 

it is simple if that black knight at c5 is not there

Yes, that thing is creating problems. 

Mission X: OUTWIT THE JUMPER! 

The key is to give a check every move, otherwise black will start off with perpetual checking and will survive 4 moves no matter what.