Subject: Re: Rotation for 4 tables
Date: Thu, 3 Jun 1999 21:15:44 +0200
From: "Henk Uijterwaal (RIPE-NCC)" 
Newsgroups: rec.games.bridge

On Tue, 1 Jun 1999 goman3345@my-deja.com wrote:


> I'm having a bridge party this weekend for 16 people (4 tables) -- the
> only tally cards I can find have rotations for either 2 or 3 tables --
> can anyone give me a rotation for **four** tables so that, as often as
> possible, people are mixed and play with various others during the
> evening?  Thanks-Judy Miller

8 pairs:

          Table 1   Table 2   Table 3   Table 4
          NS EW Brd NS EW Brd NS EW Brd NS EW Brd
Round 1    8  1  A   3  6  D   2  7  F   5  4  G
      2    8  2  B   4  7  E   3  1  G   6  5  A
      3    8  3  C   5  1  F   4  2  A   7  6  B

and so on until round 7.  If you want to play 7 boards during the evening,
Brd A is board 1, for 14 board A=1+2, B=3+4, etc.., for 21 boards A=1-3,
B=4-6, etc.

16 individuals:

           Table 1        Table 2        Table 3        Table 4
           N  S  E  W  B  N  S  E  W  B  N  S  E  W  B  N  S  E  W  B
Round 1   16  1 15 12  A  6  7  9 11  C  4  8 14  5  G 13  3 10  2  H
      2   16  2  1 13  B  7  8 10 12  D  5  9 15  6  H 14  4 11  3  I
      3   16  3  2 ....

And so on until round 15.  After 15 rounds, everybody has partnered
everybody once.  For 15 boards on the evening A = board 1, for 30 A=board
1 and 2, B=3+4, ...

4 teams of 4.

The first team consists of pairs 1 and 2, the second of pairs 3 and 4,
etc:

          Table 1   Table 2   Table 3   Table 4
          NS EW Brd NS EW Brd NS EW Brd NS EW Brd
Round 1    1  3  A  4  2   A   5  7  B   8  6  B
      2    1  5  A  6  2   A   3  7  B   8  4  B
      3    1  7  A  8  2   B   3  5  B   6  4  B

After each round, score up and shuffle the boards.  A variation is:

Round 1a   1  3  A  4  2   A   5  7  B   8   6 B
      1b   1  4  B  3  4   B   5  8  A   7   6 B
Round 2a   1  5  A  6  2   A   3  7  B   8  4  B
...

Henk


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