The new age of monster Puzzles!

I have heard many people talk about this and I would also like to spread the news of the new age of Monster puzzles these are puzzles that take to more than 10 moves, I have experienced a 10 move but I have a friend who has experienced a mega monster puzzle of 43 moves. 

https://www.chess.com/analysis?fen=4r1k1%2F4P2p%2F2R3p1%2F7n%2F2P4K%2F5N1P%2F6r1%2F4R3+w+-+-+0+37&flip=true

That is the link to the Analysis boards link, I hope you can put the longest puzzle you have ever encountered!