IF YOU SOLVE THIS YOU ARE GENIUS

Having sloved the OP-problem, let's turn it into something serious. It's now a helpmate puzzle which means that both sides cooperate to get the checkmate. Black starts, white plays 1 move and then white is checkmated! How?

THANKS SIR FOR YOUR KIND REPLY THE WHITE PLAYS THE FIRTS MOVE IF YOU WANT TO SEE THAT YOU ARE IMPROVED SO YOU CAN PLAY BILND FOLD CHESSS
PLS SEEE MY ALL FOURS THANKS ONCE AGAIN
AND IF YOU WANT THE ANSWER SET THE BORD AND PRATICE IT AND IF YOU THIS YOU ARE GENIUS YOU VISTED TO MAGNUS CLUB
Ke3, then Ng2! there, I’m a genius!
Indeed you are a genius in playing king moves to e3 and knight moves to g2. Can you also solve this puzzle (which was the real puzzle the OP wanted to post)? Checkmate in 14 moves.

I am assuming you got this puzzle from the ever-popular Youtube Channel, ChessTalk? The caption of that video is legit the exact same as the title of this thread (minus the spelling error, of course). Being serious, I actually love this puzzle, because even though Black has an entire army of pieces, he still can't win -- or draw -- the game.