Round Robin Tournament Scheduling

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Title: 13 person Doubles Platform Tennis League / 13 Weeks
Post by: lunkerhunter on September 26, 2021, 09:54:31 AM

Can anyone help us (PLEASE)?

We have a 13 person doubles platform tennis league and are trying to figure out a 13 week scheduler that allows every person to partner up with each other once).  

Yes we will have a bye week but is this possible?  

Thanks very much to anyone that can help!!!!!  Really appreciate it!!!

Title: Re: 13 person Doubles Platform Tennis League / 13 Weeks
Post by: Ian Wakeling on September 26, 2021, 10:45:19 AM

What you want is a 'Whist' schedule for 13 players, which gives all partners once, and all opponents twice.  Here is an example:

[(B M):(I F)] [(C L):(D K)] [(E J):(G H)]
[(C A):(J G)] [(D M):(E L)] [(F K):(H I)]
[(D B):(K H)] [(E A):(F M)] [(G L):(I J)]
[(E C):(L I)] [(F B):(G A)] [(H M):(J K)]
[(F D):(M J)] [(G C):(H B)] [(I A):(K L)]
[(G E):(A K)] [(H D):(I C)] [(J B):(L M)]
[(H F):(B L)] [(I E):(J D)] [(K C):(M A)]
[(I G):(C M)] [(J F):(K E)] [(L D):(A B)]
[(J H):(D A)] [(K G):(L F)] [(M E):(B C)]
[(K I):(E B)] [(L H):(M G)] [(A F):(C D)]
[(L J):(F C)] [(M I):(A H)] [(B G):(D E)]
[(M K):(G D)] [(A J):(B I)] [(C H):(E F)]
[(A L):(H E)] [(B K):(C J)] [(D I):(F G)]

for even numbers of players (4n) you can click on "Visit the pages that inspired the forum", at the top of this page, and then look for 'Whist' link.  Both even (4n) and odd (4n+1) numbers of players are covered here at Durango Bill web site (http://www.durangobill.com/BridgeCyclicSolutions.html).