Why?
Puzzles only Geniuses Can Solve

Why?
Obviously the main line is if black promotes to a queen. If black goes insane and promotes to a knight (as you have set it), it's hard to find any move that doesn't win for white. It's impossible to figure out which move you want as a "solution".

Puzzle no =4
Level = IMPOSSIBLE!!!
This one is the same puzzle as this one here, but with the first move by White and Black already played, it's a mate in 12 beginning with 1.Bc7!

Easier version of the above puzzle that I actually got in the game since the opponent didnt play as well:
Puzzle number 2 is a bad joke.