Apparently, if you get this puzzle wrong you are a genius because no smart man will promote to a bishop, why would anyone do all that hardwork.
IF U SOLVE THIS PUZZLE U ARE A GENIOUS

So I am a genious.
There is more easy way to win than you suggested.
1. Rook c6, b1
2. Rook a6 ! King b7
3. Rook b6 !
)
Look for a stalemate defense (it's tricky)
I checked out my solution one more time. There is no stalemate. )
King has free squares to move.
After Rb6+ black plays Ka8. Rxb1 - stalemate
tRY I KNOW MOST OF U WONT
if u found it foooolish then no need to comment : ohhh comon i would do that in a game : if u found it offending to your brain you can click alt f4 and go thank u
Why do you need to promote to a bishop? What?
Exactly. Even Carlsen would get it wrong because of promoting to a bishop.