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How to run a double-elimination tournament: winners bracket, losers bracket and the reset

In double elimination a team is out only after its second loss. That makes it fairer than single elimination for tournaments where teams travelled and one bad game should not end the weekend. The price is roughly twice the games.

Open the free bracket builder (set the play-off to double elimination on the page)

A worked example: 6 teams, 10 games

Six invented teams are seeded 1 to 6. The bracket is sized to 8, so the #1 and #2 seeds get a first-round bye. Teams that lose in the winners bracket drop into the losers bracket; a second loss ends their run. Matches are named so you can follow who plays whom: "winner of W2M1" is whoever wins that game.

RoundMatchTeams
Winners QuarterfinalsW1M2#4 Bears vs #5 Lynx
Winners QuarterfinalsW1M4#3 Foxes vs #6 Wolves
Winners SemifinalsW2M1#1 Hawks vs winner of W1M2
Winners SemifinalsW2M2#2 Owls vs winner of W1M4
Winners FinalW3M1winner of W2M1 vs winner of W2M2
Losers round 2 (WB drop-downs)L2M1loser of W1M2 vs loser of W2M2
Losers round 2 (WB drop-downs)L2M2loser of W1M4 vs loser of W2M1
Losers round 3L3M1winner of L2M1 vs winner of L2M2
Losers round 4 (WB drop-downs)L4M1winner of L3M1 vs loser of W3M1
Grand finalGF1winner of W3M1 vs winner of L4M1
Grand final reset (only if the losers-bracket team wins GF1)GF2winner of GF1 vs loser of GF1

If the losers-bracket team wins GF1, a reset game GF2 is played between the same two teams, which makes 11 games. Otherwise the tournament ends after GF1.

The bracket comes from the same code the page runs and a test recomputes this table from it, so it cannot drift from the tool.

Build your own bracket

Questions

How many games is a double-elimination tournament?

With 6 teams it is 10 games, or 11 if the grand final reset is needed. In general a double-elimination field of n teams plays between 2n - 2 and 2n - 1 games, because every team except the champion loses exactly twice and the reset game is played only when the losers-bracket team wins the grand final.

What is a grand final reset?

The winners-bracket finalist has not lost yet, the losers-bracket finalist has lost once. If the losers-bracket team wins the grand final, both teams now have one loss, so a second game decides the title. If the winners-bracket team wins the first game, the tournament is over.

How do byes work when the field is not a power of two?

The bracket is sized up to the next power of two (8 for 6 teams) and the top seeds skip the first round. In the example, the #1 and #2 seeds have a first-round bye, and the losers bracket skips every match a bye leaves without an opponent.

When should I use double elimination instead of single?

Use it when one bad game should not end a team's weekend, such as a youth or rec tournament where every team travelled. It costs about twice the games of a single-elimination bracket, so check you have the courts and daylight for them.

Related: how a single-elimination bracket is seeded, how to make a round-robin schedule, how a Swiss tournament works, and how an Americano rotation works.