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Round Robin Pairing Tournament

Tool to simplify the planning of pairs tournaments: automatic generator of fair match schedules for a championship (also called Americano).

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Round Robin Pairing Tournament -

Tag(s) : Algorithm, Combinatorics

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# Round Robin Pairing Tournament

## Round Robin Pairing Tourmanent Generator

### What is a round robin pairing tournament? (Definition)

A pairs championship is a competition format where participants are grouped into teams of two. The teams compete in a championship where everyone meets everyone, but the partners change each day so that all players have played against and with each of the other players.

This type of championship is sometimes called Americano.

### How to generate the rounds list?

Indicate in the table the list of participants or competitors in the championship (such as players, people, etc.), placing them one per box. Then, press the Generate button to initiate the random generation of the calendar by days/rounds (represented by #) of the championship.

Each element of the table will be associated with all the others and will meet each other participant.

Example: For a pairs championship with 4 players (P1, P2, P3, P4), a possible draw could be as follows:
Round 1: (P1 & P3) against (P2 & P4)
Round 2: (P1 & P4) against (P2 & P3)
Round 3: (P2 & P1) against (P4 & P3)

Note that the number of participants must necessarily be a multiple of 4 (i.e. 4, 8, 12, 16, 20, 24, 28, 32 players), otherwise some participants may not have a teammate or opponent.

### Why are some games empty?

In a pairs championship, empty matches, designated by ??? occur when the number of players is not divisible by 4.

This means that some players may take a break during a round, as there are not enough partners or opponents available for everyone.

### How are pairs championships used in individual sports?

In addition, this format serves as a basis for organizing card tournaments like Bridge.

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Round Robin Pairing Tournament on dCode.fr [online website], retrieved on 2024-09-10, https://www.dcode.fr/round-robin-pairing-tournament

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