Round Robin Tournament Scheduling

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1
Requests / Re: Request: 24 players 4v4; 10 games
« Last post by Ian Wakeling on Today at 03:34:27 AM »
There is actually an error in the 24 player schedule that you copied - for Day 6 the first 'E' should be a 'G'.  However, this schedule is for foursomes over 7 days, each player plays exactly once with 21 different players, and has exactly two players who they never meet - so for example player A meets everyone except I and Q.  The problem is that the schedule does not work well if you try and divide each day into 3 games of 4 versus 4.  For example if you played column 1 versus column 2, then A would always oppose I, and never oppose Q.  No matter how you form the 4v4 games, you will always have poor balance for opponents.

I don't know of any software that will help you here, but perhaps I can help with a schedule.  The schedule above is for 7 rounds when you were asking for a 10 round schedule, so I presume there is some flexibility in the number of rounds - is that right?
2
Requests / Re: Request: 24 players 4v4; 10 games
« Last post by saintsriracha on Today at 01:45:14 AM »
Perhaps I found the answer - i eventually got to this page following many breadcrumbs:
https://web.archive.org/web/20120503232317/http://www.maa.org/editorial/mathgames/mathgames_08_14_07.html#g24o4d7

This appears to be the answer I was looking for (do please let me know if it appears correct):
24 golfers can play in foursomes for 7 days.
Quote
Day1 ABKU IJSE QRCM DGFX HLNO PTVW
Day2 ACLV IKTF QSDN EHGR BMOP JUWX
Day3 ADMW ILUG QTEO FBHS CJNP KRVX
Day4 AENX IMVH QUFP GCBT DJKO LRSW
Day5 AFOR INWB QVGJ HDCU EKLP MSTX
Day6 AEPS IOXC QWHK BEDV FJLM NRTU
Day7 AHJT IPRD QXBL CFEW GKMN OSUV

3
Requests / Request: 24 players 4v4; 10 games
« Last post by saintsriracha on Today at 01:17:27 AM »
First of all, huge thanks to the contributors and moderators of this forum. It's super helpful. There is not another forum like this on the internet. 

I found this awesome response for a 16 player, 4v4 10 game tournament in two fields (in ABCD EFGH ...) 
https://www.devenezia.com/round-robin/forum/?topic=774 

Would it be possible to have one for 24 players, 4v4, 10 games, 3 fields? 
Only additional requirement is not to have any one pair repeat more than twice, everyone paired with most others, and facing most everyone else. 
THANKS!

PS - is there a widget that I could install in Excell or formula to import in Google Sheets where we input # of players (maintaining 4v4 and 10 games)? 
4
Requests / Newbe
« Last post by Morti on May 15, 2024, 05:07:54 PM »
 I would like some assistance on creating a schedule of play.  We have 18 teams and would like to create a schedule where every team plays each other once before we start the rotation over in 6 weeks.  We don't need to end the season with every team playing each other an equal number of times, but as close as possible.  How do I go about creating a schedule?
 We have six pits to use.
I forgot to mention that it is important that the teams rotate on the pits that they use for each game.  What I mean is that one team can't throw on the same court all the time.  Each court is a bit different from the next due to lighting, neighboring courts, wind, rain, etc. so we want to level the playing field as much as possible.
5
Requests / Re: Help! 11 teams and 6 events.
« Last post by Ian Wakeling on May 11, 2024, 10:55:25 AM »
Reduce to 5 events, then use this schedule but remove 'match 1'. What remains is a schedule for 11 teams playing 11 rounds.  Call the 5 columns events 1 to 5, and you will have each team playing each event twice.
6
Requests / Help! 11 teams and 6 events.
« Last post by JuniperJonesJr on May 10, 2024, 03:20:04 PM »
We had a team back out. I need help with a schedule for 11 teams and 6 events. Whatever works!
7
Requests / Algoritm search: X rounds, 2 against 2, changing partners
« Last post by Skippy1957 on May 07, 2024, 01:31:16 PM »
I need an algoritm for a tournament with the following requirements:
- X rounds (2, 3, 4)
- X participants
- playing team with 2 against  team with 2
- changing partners every time
- never play with or against one another
- if not divide by 4, rest is added to the first 1 to 3 teams
Anyone a solution to this?
8
Requests / Re: 7 Team Round Robin
« Last post by Chumpson on May 03, 2024, 01:58:03 PM »
Never mind, found it on some other posts and using Richard's cyclic method.  Thanks anyway!
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Requests / 7 Team Round Robin
« Last post by Chumpson on May 03, 2024, 01:10:40 PM »
Good morning...Stumbled across this website today and hoping for some help.  I tried downloading the Excel file, but can't figure out how to make use of it, so I'm asking here for help.

Have a 7 team round robin tournament, on three courts where each team needs to play on each court at least twice. It's a given we want 1 bye per team and 1 match against every other team.  Thanks!


10
Requests / Re: A players and B players
« Last post by Ian Wakeling on April 25, 2024, 02:08:38 PM »
Hi,  Thanks for letting me know about the error in the paper - I am sorry that you had to find out the hard way.  For the benefit of anyone else reading this, there is an example of the correct schedule here - see reply #6.  The paper itself can be found here.

I was looking at my computer search code again and I have managed to find a 9 round schedule that might be of some use:

(m01 f07 v m05 f06) (m02 f01 v m06 f02) (m08 f04 v m07 f08) (m03 f05 v m04 f03)
(m08 f06 v m04 f04) (m01 f03 v m03 f01) (m02 f02 v m05 f08) (m07 f07 v m06 f05)
(m07 f05 v m08 f08) (m04 f07 v m01 f02) (m05 f04 v m06 f03) (m02 f01 v m03 f06)
(m02 f06 v m07 f03) (m08 f01 v m05 f04) (m06 f07 v m01 f08) (m03 f02 v m04 f05)
(m02 f05 v m01 f04) (m05 f02 v m08 f06) (m07 f01 v m04 f07) (m03 f03 v m06 f08)
(m07 f04 v m03 f02) (m02 f07 v m04 f06) (m01 f01 v m08 f03) (m06 f08 v m05 f05)
(m07 f05 v m05 f01) (m01 f06 v m03 f08) (m04 f02 v m06 f04) (m08 f07 v m02 f03)
(m04 f08 v m05 f03) (m08 f02 v m03 f07) (m07 f06 v m06 f01) (m02 f04 v m01 f05)
(m01 f03 v m07 f02) (m02 f08 v m04 f01) (m08 f05 v m06 f06) (m03 f04 v m05 f07)

So above each player has
  1 repeated partner
  1 repeated opposite sex opponent
  2 repeated same sex opponents

Hope that helps.