Suggested Formats for ACF Tournaments

Field (# of teams) Type Description
4 quadruple round robin 12 games in 12 rounds leaving at least 2 packets for finals that have not been seen by finals teams
5 double round robin, followed by top 3/bottom 2 split round robin 10 games in 12 or 13 rounds, if teams 4 and 5 play twice
6 double round robin 10 games in 10 rounds
7 double round robin 12 games in 14 rounds
8 round robin, followed by top 4/bottom 4 split round robin 10 games in 10 rounds
9 round robin, followed by top 3/middle 3/bottom 3 split round robin 10 games in 12 rounds; non-blind packets used on teams’ byes
10 round robin, followed by top 4/middle 3/bottom 3 split round robin 11 or 12 games in 12 rounds; if there are five non-blind packets, then at least 1 must be from a team with a playoff bye and 2 others from teams not involved in the finals
11 round robin 10 games in 11 rounds
12 round robin 11 games in 11 rounds; run different packets in different rooms if necessary because of non-blind packets (i.e. run Chicago A packet in one room and Michigan A packet in another room to avoid teams hearing their own packet)
13 round robin 12 games in 13 rounds; non-blind packets used on teams’ byes
14 split 7/7 for prelim round robin, followed by top 3/bottom 4 split with top 3 playing full round robin and bottom 4 playing crossover 10 or 11 games in 11 or 12 rounds
15 split 8/7 for prelim round robin, followed by top 4/bottom (3/4) crossover 10 or 11 games in 11 rounds
16 split 8/8 for prelim round robin, followed by top 4/bottom 4 crossover 11 games in 11 rounds
17 split 9/8 for prelim round robin, followed by a 3/3/(3/2) crossover 10 games in 12 rounds (note 2-round difference between the end of the 9 team bracket and the end of the 8 team bracket that could be problematic)
18 split 9/9 for prelim round robin, followed by top 3/middle 3/bottom 3 crossover 10 games in 12 rounds; non-blind packets used on teams’ byes
19 split 10/9 for prelim round robin, followed by top (3/4)/middle 3/bottom 3 crossover 10 or 11 games in 12 or 13 rounds; non-blind packets used on teams’ byes (note that the crossover top bracket ends up with 4 teams from the 10 team bracket and 3 from the 9 team bracket)
20 split 10/10 for prelim round robin, followed by 2/2/2/2/2 crossover 11 games in 11 rounds
21 split 7/7/7 for prelim round robin, followed by taking the top 2 in each bracket to full round robin, with the remaining 15 teams divided into 5-team brackets using statistical tiebreakers 10 or 11 games in 12 rounds (note that this format requires hosts to have reasonably well-updated stats and may cause delays)
22 split 11/11 for prelim round robin, followed by 2/2/2/2/2/1 crossover 11 or 12 games in 12 or 13 rounds; non-blind packets used on teams’ byes
23 split 12/11 for prelim round robin, followed by 2/2/2/2/2/(1 or 2) crossover 12 or 13 games in 13 rounds; non-blind packets used on teams’ byes (note that depending on how many of the top teams submit packets that are used, this may not be entirely feasible)
24 split 8/8/8 for prelim round robin, then 2/2/2/2 crossover 11 games in 11 rounds

If your tournament has more teams, please feel free to contact an ACF member or leave a comment on this post.

One Response to Suggested Formats for ACF Tournaments

  1. Pingback: Suggested Formats for ACF Tournaments | Academic Competition Federation

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