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No, it works all manually. 70% of the post rewards go to a beneficiary whose wallet builds up the prizepool. The prizes are then paid out as described e.g. here:
https://peakd.com/hive-157286/@stayoutoftherz/the-hivechess-tournament-is-back-start-of-season-15-this-friday

Ah, I saw that before and wanted to try it out too.
It might end up becoming a Hive game in our Discord πŸ˜‰