Bridge & other card games/18 team marathon

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Question
I am chairperson for a 12 month marathon with 18 teams.  Can you tell me a rotation?

Answer
Hi,

Here is a rotation for 18 teams over 12 months. There are no repeat matchups.

Month          team Matchups

1       18-1 17-2 16-3 15-4 14-5 13-6 12-7  11-8 10-9
2       18-2  1-3 17-4 16-5 15-6 14-7 13-8  12-9 11-10
3       18-3  2-4  1-5 17-6 16-7 15-8 14-9  13-10 12-11
4       18-4  3-5  2-6  1-7 17-8 16-9 15-10 14-11 13-12
5       18-5  4-6  3-7  2-8 1-9 17-10 16-11 15-12 14-13
6       18-6  5-7  4-8  3-9 2-10 1-11 17-12 16-13 15-14
7       18-7  6-8  5-9 4-10 3-11 2-12  1-13 17-14 16-15
8       18-8  7-9 6-10 5-11 4-12 3-13  2-14  1-15 17-16
9       18-9 8-10 7-11 6-12 5-13 4-14  3-15  2-16  1-17
10       18-10 9-11 8-12 7-13 6-14 5-15 4-16  3-17  2-1
11       18-11 10-12 9-13 8-14 7-15 6-16 5-17 4-1   3-2
12       18-12 11-13 10-14 9-15 8-16 7-17 6-1 5-2   4-3  

Bridge & other card games

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Unhunk

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I can answer questions on bidding and on cardplay with the caveat that the former may necessarily involve some subjectivity. I have been playing tournament bridge for over 20 years and I have won several regional tournaments.

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