Well, that was a month. Congrats everyone who has reached the end, and thanks to everyone who has contributed solutions and advice.
Sometime in January I will create a megathread for visualizations. If anyone has any other ideas, happy to hear them, otherwise, take a well earned 11 month rest until next year :D
wow we have someone with a positive global score in the leader board! well I have solved everything I can for now: all except 20,21,24 part2. part2 of these problems made me go "oh for fucks sake". So maybe I will just steep for a while with these questions and see if I can come up with something without having to look anywhere.