Ok, this video will show
a) How to get a treasure map
b) How to start a treasure hunt run and build up the number of turns from 8 to 17.
c) How to fail miserably and finish only with 1 vault
I recommend to focus on the moments when there are several 5-in-a-row possibilities. It's vital to try to choose a turn which also leaves the others to be made in the next turns. Also there are some moves which are done in order to create a 5-in-a-row possibility. Those turns are like 4-in-a-row turns in a long run, so you don't lose any vital turns.
This will be the last video I post. I hope someone that is struggling with this trophy/achievement, but is determined to do it, gets some hints and ideas when watching. My tips in text form can be read from the 5th post. Good luck to everyone trying to get this trophy!