Enter teams with their Elo, choose how many groups, and check balance — within each group and across all groups.
Group avg spread measures balance across groups (lower = groups are evenly matched). Range and SD inside a group measure balance within it. Per-matchup gaps show the Elo difference each round-robin game would have \u2014 a high max gap means at least one lopsided match even if the group average looks fair. Select a sort mode then confirm with Sort now! — Original input preserves entry order; Auto-balance (snake draft) equalizes group averages; Skill tiers puts similarly-rated teams together in the same group.