can team scheduled be modified

[michele57]

We made a schedule for 12 round robin teams.  On the 1st night 12 teams played as scheduled. 2 new teams joined and played each other,  How can I now re create round robin to accommodate 14 teams.  I have been racking my brain trying to make the algorithm work Is what I want to do even possible.  Please help.  I need to understand in next 2 days or tell last two teams they can not play.  Thanks in advance for a reply, your time and concern in helping our league., or direct me where I can figure this out.  Newbie, Michele

[Ian Wakeling]

Michele,

This is possible.  Start with a new schedule for 14 players that you could find by following the schedules link above.  All you need to do is make the correct assignment of the numbers 1 to 14 from the new schedule to the 14 teams.   So any two teams who played together on the first night must be given team numbers that are paired in the first round of the new schedule.   Does that make sense?

Ian.

[wbport]

The trick is knowing how RR tables are put together.  In chess, one person would stay put while everyone else would play whoever is across from them on a long table.  Each round, everyone except for the "anchor" or "ghost" (won't exist if there are an odd number of players--the person or team would get a bye for that round).

I don't know what RR table you used originally, but your ghost would either be 1 or 12 and is probably shown in the same column for each round.  Note the order in which players come to him--that is the same order they will follow on the long table.  To get the new teams in, just add a new "board" at the other end from your ghost.

It is better illustrated on this site: late.htm and it has links to other helpful pages, including a site to produce round robin tables.  It is set up for chess, but White and Black can be changed to Home and Away.

[michele57]

I appreciate your timely responses.  Thank you. unfortunately I do not understand. I am almost hearing I have to change the numbers already assigned by reading "So any two teams who played together on the first night must be given team numbers that are paired in the first round of the new schedule."  but I also realized this makes no sense in the way I am understanding,  I have tried to rearrange the attached 14 schedule but just could not get it.  :-? :-? :-?Although I now know I really need to fully understand the system as this may  happen in future again. I am afraid I will not fully understand by Friday.  I spent too much time trying on my own, believing it would be relatively easy as I already had something to work with.  I also searched the web for understanding how to add in and finally stumbled onto your site.  I originally just used a generator.   When I went to send I realized I could attach the 14 schedule I have to work with. The full 12 would not fit.  So on week one the schedule we started with was 2-1  3-12  4-11  5-10  6-9  7-8  13-14. I realize I am repeating myself, repeating back is part of how I learn. Maybe having this info would help you in making me understand. I am hoping to understand a formula that's fairly easy for me to understand.  Thank you, again, in advance for now your patience and understanding.
I so much appreciate it.  Michele

[wbport]

I found the printyourbracket.com site and looked at the 12 player RR and couldn't decipher it either.  If none of the 2nd round games have been played, this might work.  Renumber your teams as follows:
1-> 1,  2-> 14, 3-> 8, 4-> 2, 5->9, 6->3, 7->10, 8->5, 9->12, 10->6, 11->13, 12-> 7, new1->4, new2->11

Use this table:

13 or 14 players
Rd    Pairings
 1:   1-14   8-7   13-2    9-6   12-3   10-5   11-4  
 2:  14-8    2-1    7-9    3-13   6-10   4-12   5-11 
 3:   2-14   9-8    1-3   10-7   13-4   11-6   12-5  
 4:  14-9    3-2    8-10   4-1    7-11   5-13   6-12 
 5:   3-14  10-9    2-4   11-8    1-5   12-7   13-6  
 6:  14-10   4-3    9-11   5-2    8-12   6-1    7-13 
 7:   4-14  11-10   3-5   12-9    2-6   13-8    1-7  
 8:  14-11   5-4   10-12   6-3    9-13   7-2    8-1  
 9:   5-14  12-11   4-6   13-10   3-7    1-9    2-8  
10:  14-12   6-5   11-13   7-4   10-1    8-3    9-2  
11:   6-14  13-12   5-7    1-11   4-8    2-10   3-9  
12:  14-13   7-6   12-1    8-5   11-2    9-4   10-3  
13:   7-14   1-13   6-8    2-12   5-9    3-11   4-10 

Good luck!

[michele57]

I DID IT, I FIGURED IT OUT,  I ADJUSTED THE 1ST WEEK TO BE AS PLAYED AND THEN ADJUSTED JUST THE LAST WEEK.  SOMETIMES IT JUST ENDS UP CLICKING FOR ME AFTER HEARING SOMETHING ELSE.  THANK YOU SO MUCH FOR YOUR INPUT.

MICHELE 8-)

[michele57]

I had thought of that but in my brain could not see how that was a solution.  With you explanation I do now.  Thank you.  I went back and proved that what I did by changing rd 13 did not work. LOL and will use your method,  Thank you very very much

[michele57]

  :-?:(So now I am here with my team mate actually changing team names. The list below  as I understand it, you state to renumber my teams to,  team 1 remains team 1,  team 2 becomes 14,  then team 3 becomes 8 etc.  Below this list you state NEW 1 becomes 4 and new 2 becomes 11, So to clarify as I see it,  I will renumber all 14 teams like stated in your first line then after I do that  I will renumber 1 to 4 and then 2 to 11, which does not work.  If I follow as I understand We will have no team 1 or no team2 but (2) team 4's and (2) team 11's. I am very sorry I am not understanding and ask if it is possible to be explained yet another way I can understand. Also do I use the table given after the team numbers have been changed?   Thank you again for your help.  Michele

[wbport]

Team 1 stays team 1.  Everyone else's number changed.

What I did was to renumber (almost) every team so that the pairings of your first round would have happened in a 14 team RR.

[michele57]

Thank you my team member figured that out.  Thank you again for your help, very much appreciated

[wbport]

You're welcome.  Just saw I didn't finish a key sentence in an earlier post.

The trick is knowing how RR tables are put together.  In chess, one person would stay put while everyone else would play whoever is across from them on a long table.  Each round, everyone except for the "anchor" or "ghost" (won't exist if there are an odd number of players--the person or team would get a bye for that round) would rotate one position.