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Example of a round-robin tournament with 10 participants. A round-robin tournament or all-play-all tournament is a competition format in which each contestant meets every other participant, usually in turn. [1] [2] A round-robin contrasts with an elimination tournament, wherein participants are eliminated after a certain number of wins or losses.
In a round-robin tournament, all playoff contenders play each other an equal number of times, usually once or twice (the latter is often called a "double round robin"). This is a common tournament format in association football. In the FIFA World Cup, teams are organized into eight pools of four teams, with each team playing the other three ...
In round-robin tournaments, usually one competitor gets a bye in each round when there are an odd number of competitors, as it is impossible for all competitors to play in the same round. However, over the whole tournament, each plays the same number of games as well as sitting out for the same number of rounds.
A special type of group tournament is the Round-robin tournament, in which each player plays against every other player. Usually each competitor finishes with an equal number of matches, in which case rankings by total points and by average points are equivalent at the end of the tournament, though not necessarily while it is in progress.
The change was intended to allow the expansion of the main stage of the tournament from twelve to sixteen teams while keeping the round robin at eleven games. The teams are seeded using a ranking system in which points are calculated based on the teams' results in all competitive bonspiels using a complicated formula. Seeds 1, 4, 5, 8, 9, 12 ...
GR A is the number of games remaining for Team A in the season; L B is the number of losses that Team B has in the season; This third formula basically says: Assume Team A loses every remaining game. Calculate how many games team B needs to lose to surpass team A's maximum total by 1. Using the example above and with the same 162-game season ...
In a tournament format that uses a round-robin group stage, the number of matches that need to be played between n teams is equal to the triangular number T n − 1. For example, a group stage with 4 teams requires 6 matches, and a group stage with 8 teams requires 28 matches.
The name tournament comes from interpreting the graph as the outcome of a round-robin tournament, a game where each player is paired against every other exactly once. In a tournament, the vertices represent the players, and the edges between players point from the winner to the loser.