In an effort to change up the monthly answering competition, I introduce the 'King of the Castle' format.
Day 0: Nobody is Regent. The Game of throne begins.
Answer a question posted before March 31, 2019. Get an upvote. Add it to the answer below. You become the 'Regent'.
Whoever is the 'Regent' at the end of November wins the competition.
Dethroning: If your upvoted answer is invalidated (question is closed, answer loses its votes, is determined to not fit the old question criteria), you are dethroned and the previous Regent retakes the throne. If there is no previous regent, the throne is vacant.
Please add a comment below if clarifications are required, and indicate if you're keen to compete.