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41

Requests / Re: Volleyball scheduling for 10 teams / 2 courts w/work team - 7 pool play matchs

« Last post by Ian Wakeling on February 01, 2025, 12:06:17 PM »

You schedule looks pretty good to me.  I have come up with the following where the referees are in square brackets:

(B C)  (G F)  [D A]
(E H)  (D A)  [B C]
(C J)  (B I)  [E H]
(G D)  (F A)  [I J]
(I E)  (H J)  [G F]
(G B)  (F C)  [H A]
(H A)  (E D)  [G I]
(J F)  (G I)  [E D]
(H C)  (E B)  [J F]
(D I)  (A J)  [B C]
(E F)  (G H)  [I J]
(A B)  (C D)  [E F]
(I J)        [C]
   
   
(C G)  (A E)  [B D]
(B D)  (F H)  [A G]
(I A)  (J E)  [C H]
(B H)  (D F)  [G J]
(C I)  (J G)  [A E]

I am not sure what criteria you will used to evaluate how good the schedule is, so let me know what you think.

42

Requests / Volleyball scheduling for 10 teams / 2 courts w/work team - 7 pool play matchs

« Last post by KNVBC Volleyball on January 25, 2025, 11:18:44 AM »

We are hosting a volleyball tourney where we guarantee 8 matches.  We have 10 team pools and want to give 7 pool play matches to seed teams - then move all teams to a 10 team playoff bracket based on pool seeding (I have all tie break procedures laid out).  This is a youth tournament played on 2 courts over the course of 2 days.  We need a work team on each of the pool play matches so will have 6 teams playing or working at each round.  Preference is to give as much equal rest and work / play time as possible. 

We have 80 teams across 6 divisions using 16 courts so this is a fun one.  Anyone have a program or work anything like this n the past.  I have my schedules from last couple of years but hoping someone has another view?  If no other options - any suggesting that can improve the below?

Example:

43

Requests / Re: 13 team random mixed doubles schedule - 5 games each

« Last post by Ian Wakeling on January 22, 2025, 03:50:35 AM »

Is reply #9 here, from a conversation we had about three years ago, something close to what you are looking for?  If not, can you specify more about the format of play - how many courts, and how many rounds?

44

Requests / 13 team random mixed doubles schedule - 5 games each

« Last post by bobmasi on January 17, 2025, 04:15:31 PM »

Hello Ian,

I am looking for a 13 mixed doubles teams schedule where they play 5 games each.
Each player has a different partner each game and there are no repeats of opponents they play.

Can you assist.  You did this before for me, but it was for 12 teams.  Whatever you can do that comes the closest would be great.

Many Thanks in Advance
Bob Masi
,

45

Requests / Re: Court Balanced Round Robin - Home of Ian Wakeling's Excel workbook

« Last post by klima on January 17, 2025, 10:15:13 AM »

Hi, and thanks for your hard work, I use your excel program every year for generate league of darts championship in Italy region (Friuli).
I know that if I have clubs that share venue, I edit names in list because 1 and 2, 3 and 4 (and so on) never share same home... but if I like to play the first match in every shared home, there's a specific number of random that have first match with 1 vs 2, 3 vs 4, and so on?

Thanks in advance

Alen

46

Requests / Re: 20 players. Group A and B

« Last post by blascogo on January 09, 2025, 05:23:50 AM »

Thanks a lot for your help.
I have been working in the unfairness score following what it is proposed here: Tournament Designs: Individual-Pairs
I have found a good balance, I think, but not sure because the number of possible permutations is huge.
Thanks again! 

47

Requests / Re: 20 players. Group A and B

« Last post by Ian Wakeling on December 30, 2024, 10:59:31 AM »

Here is a 9 round schedule.  All the partnerships are different and every player has one bye round.

(m6 f8 v m1 f5) (m7 f2 v m3 f3) (m5 f4 v m8 f1) (m4 f7 v m2 f6)
(m1 f7 v m3 f1) (m4 f4 v m6 f3) (m2 f9 v m5 f6) (m9 f2 v m7 f5)
(m4 f2 v m8 f8) (m1 f3 v m5 f9) (m2 f5 v m3 f4) (m6 f1 v m9 f6)
(m1 f2 v m2 f4) (m3 f7 v m5 f8) (m7 f3 v m8 f5) (m4 f9 v m9 f1)
(m7 f4 v m4 f6) (m8 f2 v m1 f1) (m3 f8 v m9 f9) (m6 f7 v m2 f3)
(m3 f2 v m7 f7) (m6 f5 v m5 f1) (m8 f9 v m2 f8) (m9 f3 v m1 f6)
(m2 f1 v m7 f8) (m5 f2 v m6 f6) (m8 f4 v m9 f7) (m4 f5 v m1 f9)
(m3 f5 v m4 f1) (m9 f4 v m5 f3) (m8 f7 v m6 f9) (m1 f8 v m7 f6)
(m7 f9 v m6 f4) (m5 f7 v m4 f8) (m3 f6 v m8 f3) (m2 f2 v m9 f5)

48

Requests / Re: 20 players. Group A and B

« Last post by blascogo on December 29, 2024, 11:53:32 AM »

Thanks for your help.

I am planning to play a 9-rounds championship for 18 people. We will play on a weekly basis, so two persons will take a rest every week.
I will think about the unfairness score.

Thanks again.

49

Requests / Re: 20 players. Group A and B

« Last post by Ian Wakeling on December 29, 2024, 10:32:08 AM »

I don't have any existing way of attempting to optimize the couples as you describe. The way to go about this is to define an unfairness score for a match based on how far apart the rankings of the four players were, and then look for schedules that minimize the total unfairness score for all games in the schedule.  This could even be done on an existing mixed doubles schedule, as you could consider permutations of the player numbers within each group, each permutation gives a different unfairness score, and an algorithm could be used to choose permutations that drive down the total score.

I could make a schedule without the couples balance, but how many rounds are you looking for when there are 18 players?  With four courts there will be two byes per round, so only schedules with a multiple of 9 rounds can have the same number of games for each player.

50

Requests / Re: 20 players. Group A and B

« Last post by blascogo on December 27, 2024, 06:32:49 AM »

Hello again,

Is there a way to plan the matches in a way that we have well balanced couples? Let me explain myself. I am planning to rank players having the more competent on top of the list. This means that the couple m01 f01 would be "strongest". Is there a way that you can build a fixture where a higher ranked "m" plays with a lower ranked "f". I mean that it is more desirable to have this match "m04f02 vs m03f04" than this other "m03f02 vs m04f04".

I would be interested in this fixture, if possible, for 18 players (we are missing two people in the next tournament).

Thanks a lot.