← All formatsSwiss
Swiss system
Middle ground between knockout and round robin. Few matches, accurate top.
- formula
- N × R / 2
- complexity
- medium
- best for
- 16–128+ players
How it works
Fixed number of rounds (typically log₂(N) or slightly more). Each round pairs players with the same score — no one is eliminated. Players with matching points keep meeting each other until a leader emerges. Tiebreakers: Buchholz, head-to-head.
Pros and cons
Pros
- Fewer matches with strong ranking accuracy
- Everyone plays the same number of rounds — no one drops out
- Fairer than single elimination — top players meet each other
- Faster than round robin — log₂(N) rounds instead of N−1
Cons
- Pairing depends on previous rounds — harder to run by hand
- Can produce ties on total points
- Large events need software for correct pairing
- Less familiar visually — no classic bracket
When to pick it
- 01Chess, Go, Magic: the Gathering, tabletop
- 02Medium-to-large fields (16–200+)
- 03You need a top ranking but not full round robin
- 04Fixed-round event
How many matches
Match and round count by participant number — plan your courts and schedule.
formulaN × R / 2
N players × R rounds / 2 = total matches. R is usually log₂(N) rounded up — enough to identify the champion.
| Participants | Matches | Rounds |
|---|---|---|
| 8 | 12 | 3 |
| 16 | 32 | 4 |
| 32 | 80 | 5 |
| 64 | 192 | 6 |
| 128 | 448 | 7 |