...
Which puzzle did this come from?
I couldn't find the address among the outputs of this
tx and the "puzzle" I know of is from
at least 2015 but the first transaction this address received is from 2020.
This puzzle is among the basic ones everyone is looking for, as is Puzzle 120 with a known public key.
Perhaps I misunderstood the translation. The first transaction at this address was made in 2015