Round Robin Tournament Scheduling

Schedules - You must register to Post and Download => Requests => Topic started by: Mikebell on November 14, 2011, 10:09:58 PM

Title: Euchre Tournament
Post by: Mikebell on November 14, 2011, 10:09:58 PM

Good Evening.
I am running a Euchre Tournament for 20 people.

We would like to play 9 games.

With Rotating partners....ideally you will play with a different partner each game, and against 2 different opponents each game. Doing the best we can to play with or agains everyone at least 1 time (or close to  that)
Anybody have a tournament like that they have run already and I could borrow the schedule....
Trying to figure it out myself is not easy.

Thanks

Mike

Title: Re: Euchre Tournament
Post by: Ian Wakeling on November 15, 2011, 03:30:02 AM

Here is a ten round schedule that you should be able to adapt.  All the partnerships are different and all pairs of players oppose at least once - therefore each player plays against one of the other 19 players twice.

Hope that helps.

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

Title: Re: Euchre Tournament
Post by: Mikebell on November 16, 2011, 06:23:02 PM

That is very helpful thank you.

Title: Re: Euchre Tournament
Post by: Jenward29 on December 14, 2011, 06:44:58 PM

How about if you only have 8 or 11 players for 10 weeks? What if you had 8 or 12 players for 8 weeks? What would the rotation be for each?

Title: Re: Euchre Tournament
Post by: Ian Wakeling on December 16, 2011, 03:50:46 AM

The hardest problem to solve is 12 players for 8 rounds and I think the following is about the best that can be done:

  (12  1 v  8  5) (11  3 v  7  9) ( 6  4 v 2 10)
  ( 9 10 v 11  8) ( 3  6 v  5  1) (12  7 v 2  4)
  ( 3  2 v  5  9) (10 12 v  1  7) ( 6 11 v 8  4)
  ( 5  3 v 10  4) ( 9 11 v 12  2) ( 7  6 v 1  8)
  ( 7  8 v  5  2) ( 4  3 v  1 11) ( 9 12 v 6 10)
  ( 1  6 v  2  9) ( 4 12 v  3  8) (11  7 v 5 10)
  (10 11 v  1  2) ( 8  9 v  4  5) ( 6 12 v 7  3)
  ( 2  8 v  3 10) (11 12 v  6  5) ( 9  1 v 4  7)

All the partnerships are different and pairs play in opposition either once or twice.

Some of the other problems that you have listed are close to a classic whist design, so the best solution is to start with one of those and modify it as necessary.

You can find the whist schedules by clicking on the 'schedules' button above and then choosing 'whist'.

For example

8 players and 8/10 weeks: add rounds to the fully balanced 7 round whist schedule for 8 players.

11 players leaves 3 byes per round, and you would need 11 rounds to give everyone the same number of games (8 games + 3 byes).  Is it possible to play with one table of 3 - in which case delete player 12 from the 12 player whist?