Four tournament formats, four very different events. This guide compares single elimination, double elimination, round robin and Swiss on the things that actually decide which one you should run: how many matches you have to schedule, how many games each team is guaranteed, and what you give up in exchange.
Format comparison at a glance
| Format | Matches (16 teams) | Rounds | Games per team | Best for | Trade-off |
|---|---|---|---|---|---|
| Single Elimination | 15 | 4 | 1 minimum | One-day LANs, community cups, tight schedules | One bad map ends a run; high variance |
| Double Elimination | 30–31 | 7–8 | 2 minimum | Majors, qualifiers, prize-pool events | Roughly double the runtime and staffing |
| Round Robin | 120 | 15 | 15 | Leagues, group stages, pods of 4–8 | Match count scales quadratically |
| Swiss System | 32 | 4 | 4 | Large open fields, FGC pools, CS2 majors | Produces a ranking, not a champion |
How to choose in practice
Start from your two hard constraints: how many hours you have, and how many entrants you accepted. Single elimination fits the most teams into the fewest hours, which is why it dominates free community cups. Double elimination costs roughly twice the time but is far more likely to crown the genuinely best team, so it is the default once money is involved.
Round robin is the fairest structure that exists — everyone plays everyone — but it only stays practical up to about ten entrants. Beyond that, split into groups, run round robin inside each group, then send the top finishers into an elimination bracket. That group-stage-into-playoffs shape is what most leagues actually run.
Swiss is the answer when you have a large open field and limited rounds. Nobody is eliminated early, everyone plays the same number of games, and the field sorts itself by record. A 128-player Swiss resolves in 7 rounds where single elimination would need 127 matches. Because Swiss produces a ranking rather than a single winner, pair it with a playoff cut for the top finishers.
Build any of them free
Each format has a dedicated generator with the structure pre-selected: single elimination, double elimination, round robin and Swiss system. Or open the full bracket generator and switch between them freely.