Round Robin Tournament Scheduling

Schedules - You must register to Post and Download => Requests => Topic started by: sue on May 23, 2022, 12:42:53 PM

Title: bridge schedule
Post by: sue on May 23, 2022, 12:42:53 PM
I want to make a schedule for 28 teams that play for 8 months. Each month four teams play each other. is it possible to make a schedule and have no two teams play each other more than once?  Also, keeping numbers 1 - 7  in the first column, 8  - 14  in the second column, etc.

    1  8    15   22
    2  9    16   23  
    3  10  17   24
    4  11  18   25
    5  12  19   26
    6  13  20   27
    7  14  21   28

I think i need a miracle.

Thank You,
Sue Colella
    
Title: Re: bridge schedule
Post by: sue on May 24, 2022, 10:23:01 PM
I want to make a schedule for 28 teams that play once a month for 8 months.
Each month  four teams play each other. Is it possible to make a schedule and  have no two teams play each other more than once?  Also, keeping numbers 1-7 in the first column, 8-16 in the second column, etc.

Sincerely,
Sue
Title: Re: bridge schedule
Post by: Ian Wakeling on May 25, 2022, 04:19:24 AM
Sue,

Unfortunately, what you are asking is impossible.  Arranging players in columns in the way that you have specified means that a player can never play against the other 6 players within their column.  This limits the total number of opponents to 21.  However in 8 months of play a player must have 24 opponents, and as there is only a pool of 21 to choose from, this means that some of the opponents must be the same.  All may not be lost, if you reduce the requirement to 7 months of play, then you can have all 21 possible opponents exactly once - to do this the use the foursome schedule for 28 players that you can find in the attachment available in this thread (https://www.devenezia.com/round-robin/forum/?topic=1115).

BTW you can only see attachments if you are logged into the forum.

Ian