- League (round-robin)
- Everyone plays everyone — the fairest way to rank a field over a season.
- Home & away
- A league where every pair plays twice — once at home, once away.
- Knockout
- Win or go home — fastest way to a champion; great for one-day events.
- Swiss
- Many players, few rounds — opponents matched by record. Built for chess and large fields.
- Double elimination
- One loss isn't the end — a losers' bracket gives everyone a second chance.
- Groups + knockout
- Group stage to sort the field, then a knockout to crown a winner — the World Cup format.
- Chess scoring
- Half-points, Swiss pairing and Sonneborn-Berger tiebreaks built in.