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Bridge & other card games/MARATHON BRIDGE ROTATION

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Question
QUESTION: YOUR ANSWER FOR 8 PAIR MARATHON ROTATION WORKS FOR A SINGLE SITE.

EACH MONTH WE PLAY AT TWO DIFFERENT SITES WITH 4 PAIRS AT EACH SITE. HOW DO WE SCHEDULE FOR A 7 MONTH PERIOD WITH EACH PAIR PLAYING EACH OTHER PAIR THE SAME NUMBER OF TIMES AS CLOSE AS POSSIBLE

ANSWER: Hi,

Does any given pair stay at the same site from one month to the next or can it change its location from month to month? Does a pair play all three other pairs at the same site every month or does it just play one of the other pairs?

---------- FOLLOW-UP ----------

QUESTION: No one pair stays at the same place every month. Each month we rotate homes with two different hosts. At each site ever pair plays ever other pair.

Answer
Hi,

You could try this. Give each pair a number from 1 to 8.

The following chart list the pairs in each home, four to a home, for seven months.

Month      Home #1     Home #2

1         8 1 6 2    5 7 3 4
2         8 2 7 3    6 1 4 5
3         8 3 1 4    7 2 5 6
4         8 4 2 5    1 3 6 7
5         8 5 3 6    2 4 7 1
6         8 6 4 7    3 5 1 2
7         8 7 5 1    4 6 2 3

Each pair meets every other pair (is in the same home) exactly three times.

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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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