How does Double-Elimination work?
The Top Bracket (for undefeated teams) works just like a standard elimination ladder: teams play matches with the winner advancing to the next round until only one team remains undefeated. The difference is what happens to teams that lose a match in the Top Bracket: instead of being eliminated from the tournament, they move to the Bottom Bracket. The Bottom Bracket is also a ladder, and one in which a loss means elimination from the tournament. However, since new teams are arriving in the Bottom Bracket after each Top Bracket round, the Bottom Bracket must play matches twice as often to make room. This is why the Bottom Bracket matches are only 3 games long. Once only one team remains in each of the Top and Bottom Brackets, these two survivors advance to the Grand Final.