Answers.Body: <p>I have found <a href="https://www.oxfordfusion.com/epsca/" rel="nofollow noreferrer">this web page</a> with a number of Excel spreadsheets programmed for 3 round jamboree pairings for 4, 6, 8, 10, 12, 16, 20 board matches with 3 to 26 teams. Also 12 board 2 round jamboree and 12 board 5 round.</p>
  <p>Maybe you can download the spreadsheets and work out the algorithms used if they don't cover your use case.</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2023-12-11T16:20:37.200Z
Answers.Text: Yes, I came across this site but it didn't include the exact configuration I wanted (12 10-player teams with 3 rounds). I tried a Google search on the algorithm used but I didn't get anything. It seems that this system is very niche and/or possibly outdated.
Answers.UserDisplayName: Developer
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2023-12-10T23:36:44.040Z
Answers.LastActivityDate: 2023-12-10T23:36:44.040Z
Answers.UserDisplayName: Brian Towers
Body: <p>Is there any algorithm that generates pairings for a Jamboree chess tournament, given the number of teams, the number of players in each team (no. boards) and the number of rounds? I've read somewhere that you can extrapolate the pairings for smaller numbers of teams to find those for more teams, but I'm slightly unsure how to do this?</p>
  <p>We are trying to minimise the color difference so that in each round, the number of blacks for each team should be as close as possible to the number of whites. For odd numbers of teams, no player should have more than one up-float or more than one down-float. And, over all the rounds taken together, the number of up-floats for each team should be as close as possible to the number of down-floats.</p>
  
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2023-12-08T23:54:42.840Z
Comments.Text: I would suggest adding some details on what the pairing rules are. Are we trying to minimize board differences, color differences, the number of times one team plays another, etc.?
Comments.UserDisplayName: D M
Tags: <tournament><jamboree><pairing>
Title: Algorithm for generating Jamboree chess pairings
ThreadText: # Algorithm for generating Jamboree chess pairings
  
  (Asked by: username_0 on 2023-12-08)
  
  Is there any algorithm that generates pairings for a Jamboree chess tournament, given the number of teams, the number of players in each team (no. boards) and the number of rounds? I've read somewhere that you can extrapolate the pairings for smaller numbers of teams to find those for more teams, but I'm slightly unsure how to do this?
  
  We are trying to minimise the color difference so that in each round, the number of blacks for each team should be as close as possible to the number of whites. For odd numbers of teams, no player should have more than one up-float or more than one down-float. And, over all the rounds taken together, the number of up-floats for each team should be as close as possible to the number of down-floats.
  
  **Tags:** tournament, jamboree, pairing
  
  > **Comments:**
  > **username_1**: I would suggest adding some details on what the pairing rules are. Are we trying to minimize board differences, color differences, the number of times one team plays another, etc.?  
  
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  ## 1 answers
  
  ### Answer by username_2 on 2023-12-10. Score: 1
  
  I have found [this web page](https://www.oxfordfusion.com/epsca/) with a number of Excel spreadsheets programmed for 3 round jamboree pairings for 4, 6, 8, 10, 12, 16, 20 board matches with 3 to 26 teams. Also 12 board 2 round jamboree and 12 board 5 round.
  
  Maybe you can download the spreadsheets and work out the algorithms used if they don't cover your use case.
  
  > **Comments:**
  > **username_0**: Yes, I came across this site but it didn't include the exact configuration I wanted (12 10-player teams with 3 rounds). I tried a Google search on the algorithm used but I didn't get anything. It seems that this system is very niche and/or possibly outdated.  
  
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