Swiss-system tournament
Let an agent explain the Swiss system and its pairing rules, relay official pairing systems and tiebreaks from federations such as FIDE, describe uses across games and sports, and distinguish it from round-robin and knockout formats.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
Let an agent explain the Swiss system and its pairing rules, relay official pairing systems and tiebreaks from federations such as FIDE, describe uses across games and sports, and distinguish it from round-robin and knockout formats.
A tournament format in which players are paired in each round against opponents with similar scores rather than in elimination or all-play-all, so that a large field can be ranked in a fixed number of rounds without anyone being eliminated, first used at a Zurich chess tournament in 1895 and now standard in chess, Go, bridge, debating and esports, with variants such as accelerated pairings and the Dutch and Burstein systems and tiebreaks such as Buchholz.
What it is for: Ranking large fields in few rounds.
It can be explain the format and pairing rules; relay official systems and tiebreaks; describe uses; distinguish from other formats.
Distinguishing features
No elimination
Score-group pairing
Fixed rounds
Tiebreak reliance
What it looks like
Not a physical object; pairing tables and standings by round.
Physical character
first use: 1895 year - Zurich
rounds needed for winner: about log2 of players rounds - rule of thumb
How it is recognised
Score-based pairing tournament
Dutch, Burstein and accelerated systems, Buchholz tiebreaks
Round-robin plays everyone; knockout eliminates losers; ladders are ongoing
Related models
is a kind of - in registry terms
is used in - as the standard open format
is standardised by - through pairing rules
is contrasted with - the all-play-all format
In practice
Families and kinds
FIDE Dutch system
Burstein and Lim systems
accelerated Swiss pairings
McMahon system in Go
Swiss in bridge, debating, esports and card games
tiebreak systems such as Buchholz and Sonneborn-Berger
Standards and regulation
FIDE Swiss pairing rules and endorsed software
Federation rules in Go, bridge and other games
Tournament regulations of organisers
Failure modes and hazards
Pairing errors
Unfair tiebreaks
Too few rounds for field size
Confusing with other formats
Where this came from
wikidata · CC0 1.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Understand What the Swiss system is.
Definition.
Definition
Definition and principles.
Definition
Definition.
- What is a Swiss-system tournament, and what principles govern pairing? definition
- Is the format Swiss, round-robin, knockout or a ladder? boundary
Rules
Pairing rules.
Rules
Rules.
- How do the FIDE Dutch system and other systems pair players and handle colours and floats? definition
- Which entry fits the specific system? action
Run Running a tournament.
Practice.
Software
Software and arbitration.
Software
Software.
- How do arbiters and pairing software run Swiss tournaments? provenance
- Which references are standard? provenance
Tiebreaks
Tiebreaks.
Tiebreaks
Tiebreaks.
- How do Buchholz, Sonneborn-Berger and other tiebreaks work, and what are their limits? provenance
- Which entry fits tiebreak? action
Uses Uses beyond chess.
Context.
Games
Other games.
Games
Games.
- How is the Swiss system used in Go, bridge, debating, esports and card games? provenance
- Which sources are cited? provenance
Variants
Variants.
Variants
Variants.
- What are accelerated pairings and the McMahon system? provenance
- Which entry fits McMahon system? action
Context History and analysis.
Context.
History
History.
History
History.
- How did the Swiss system originate in 1895 and spread? provenance
- Which entry fits the history of chess tournaments? action
Analysis
Fairness analysis.
Analysis
Analysis.
- What do analyses say about the fairness and accuracy of Swiss rankings? provenance
- Which entry fits tournament design? action
What the second pass must settle
- Should the Dutch system and Buchholz be separate entries?
- How should FIDE rules be linked?
- How should non-chess variants be recorded?