The same three rankings the game shows you: rating, level and achievement points. Rating and level split by board; achievement points are earned across all of them at once.
Time invested rather than a contested rating, so there is no placement gate and no activity window here — it is the one ranking a solo-only player appears on. Classic Boggle. Three minutes, three-letter minimum.
52 ranked. No placement gate and no activity window on this one: levels are earned time rather than a contested rating, so everyone who has scored a round is here. Ties break on XP, because each level costs more than the last. Ordered by level on this board alone.
Not on the board yet? Ranked rounds need a rival — see who's about, or open the game.