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Swiss team is a form of duplicate bridge tournament. Its characteristics are immediately ranking after each round, and all teams play the complete tournament.

Mechanism Edit

The teams in the first round are arranged either by drawing, or by some previously known information such as their masterpoints. After each round, all teams are ranked in order, and in the next round, teams with the nearest ranks are played together with the requirement that no two teams may ever compete twice. The winner is determined by the total in all rounds. At least log2 n rounds are required for n tables to determine a winner.

Any form of scoring may be used, but MP scoring is uncommon because it produces lots of ties.

If there is a tie, various tie-breaking systems may be used.

Odd number of tables Edit

When there is an odd number of tables, a three-way match is used for the last 3 teams, with boards shared over two rounds between the 3 teams:

In the odd-numbered round, N-S of team A plays with E-W of team B with board set X; N-S of team B plays with E-W of team C with board set Y; N-S of team C plays with E-W of team A with board set Z.

In the even-numbered round, N-S of team A plays with E-W of team C with board set Z; N-S of team B plays with E-W of team A with board set X; N-S of team C plays with E-W of team B with board set Y.

The size of a board set in this case is the same as the size in regular rounds.

Example Edit

There are 11 teams, with the team number drawn randomly. At least 4 rounds are needed. (Since there are odd number of teams, we must play an even number of rounds.)

Round 1 Edit

Teams VPs
1 2 18 12
3 4 15 15
5 6 3 25
7 8 10 20
Three-way match between 9, 10, 11

Ranking Edit

Team Total VPs
1 18
2 12
3 15
4 15
5 3
6 25
7 10
8 20
9 N/A
10 N/A
11 N/A

Round 2 Edit

Starting from this round, the teams are put according to their rank:

Teams VPs
6 8 20 10
1 3 18 12
4 2 15 15
7 5 9 21
Three-way match between 9, 10, 11
9 10 15 15
10 11 17 13
11 9 24 6

Ranking Edit

Team Total VPs
1 36
2 27
3 27
4 30
5 24
6 45
7 19
8 30
9 21
10 32
11 37

Round 3 Edit

Teams VPs
6 11 17 13
1 10 2 25
8 4 8 22
3 2 14 16
Three-way match between 5, 9, 7

Ranking Edit

Team Total VPs
1 38
2 43
3 41
4 52
5 N/A
6 62
7 N/A
8 38
9 N/A
10 34
11 50

Round 4 Edit

In this round, we must be careful not let teams 3 and 1 play together again, as they competed in round 2 before

Teams VPs
6 4 9 21
11 2 15 15
8 1 20 10
3 10 17 13
Three-way match between 5, 9, 7
5 9 11 19
9 7 13 17
7 5 15 15

Ranking Edit

Team Total VPs
1 48
2 58
3 58
4 73
5 50
6 71
7 51
8 58
9 53
10 47
11 65

Therefore, the overall winner after 4 rounds is team 6.

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