Yes.
This is very difficult, as stockfish on lichess.org cannot solve this.
Wha's up .
This takes 10 hours to make.
Maybe to solve this, you need more than a day.
You can mate with all Kd8 Kb8 Bxb7 , however black must do the longest move.
I missed some line.
Kd8 is a suiside.wrong.
Black must do the best move to delay checkmate.
Yeah, there is many answers in this puzzle, this is failure.
Kb8.
Send me this one day in stream and I'll try it out, looking at it right away seems possible @b7 then BxN but I haven't looked at it longer than 10 secs yet! I'll have more time in stream
https://www.chess.com/forum/view/more-puzzles/puzzle-171?quote_id=38254600#comment_box