Bridge & other card games/Bridge Rotation

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Question
We have 20 teams that will play contract bridge once a month for 9 months in a central location.  Can you give us a rotation for the season?  Thanks you for your help.     Joan Papp

Answer
Hi,

Assign each team/pair a number from 1-20.

Month          Team matchups

1         20-1 19-2 18-3 17-4 16-5 15-6 14-7 13-8 12-9 11-10
2         20-2  1-3 19-4 18-5 17-6 16-7 15-8 14-9 13-10 12-11
3         20-3  2-4  1-5 19-6 18-7 17-8 16-9 15-10 14-11 13-12
4         20-4  3-5  2-6  1-7 19-8 18-9 17-10 16-11 15-12 14-13
5         20-5  4-6  3-7  2-8  1-9 19-10 18-11 17-12 15-13 15-14
6         20-6  5-7  4-8  3-9 2-10 1-11 19-12 18-13 17-14 16-15
7         20-7  6-8  5-9 4-10 3-11 2-12  1-13 19-14 18-15 17-16
8         20-8  7-9 6-10 5-11 4-12 3-13  2-14  1-15 19-16 18-17
9         20-9 8-10 7-11 6-12 5-13 4-14  3-15  2-16  1-17 19-18

Bridge & other card games

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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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