How the Football Playoff Pairings are Determined — 2006 

The boys football playoffs are the only IHSA tournament for which teams qualify on the basis of their regular-season records. There are 554 schools playing 11-man varsity football in 2006.  However, six Chicago Public League conferences comprising 40 teams do not participate in the playoffs, leaving a total of 514 eligible schools. Of these, 256 (slightly less than half) will be selected for the playoffs. The following steps are used to determine which teams receive a playoff berth and how the playoff teams are paired.

The first step is to select the 256 playoff teams. The process proceeds as follows:

1. All champions of conferences with six or more teams receive a playoff berth. If two or more teams are tied for the best conference record, the conference determines which team shall be the representative. In practice, two-team ties have always been broken on the basis of head-to-head competition when those teams have played during the regular season. Three- and four-way ties are broken by a variety of formulas.
2. The remaining schools are sorted by three categories:
   • First, by total wins
   • Second, by combined wins of all opponents (also known as "playoff points")
   • Third, by combined wins of all defeated opponents

   For example:

   School	Wins	Combined Wins of All Opponents	Combined Wins of Defeated Opponents
   Andersonville	9	30	30
   Blairburg	9	27	27
   Garland City	8	37	30
   Mulkeytown	8	37	29
   Vittleboro	7	40	30
   Edgeburg	7	38	31
   Port Clemens	6	43	30
   Cat Creek	6	37	28

3. Starting at the top of this sorted list, the teams are added to the playoff field until the 256-team limit is reached. In the event of a tie for the 256th position, the following tiebreakers are applied:
   • Head-to-head competition (if the teams have met)
   • Number of teams played that qualified for the playoffs
   • Number of wins by teams played that qualified for the playoffs
   • Coin flip

   In practice, teams with 9, 8, 7, and 6 wins will always qualify for the playoffs. Teams with 5 wins are "on the bubble," and the tie is broken by the number of playoff points (the combined wins of all opponents).

The chart below shows the historic at-large cutoff for the 256-team field.

Since almost every 5-win team qualifies for the playoffs, the "playoff point" cutoff fluctuates wildly, making it virtually meaningless as a predictor.  It is even possible that one or more 4-win teams could earn an at-large berth.

After the 256 qualifiers have been determined, the schools are broken down into 8 classes of 32 teams each, based on their "football enrollment." A school's football enrollment is the larger of these two figures:

• The school's adjusted enrollment (which is based on last year's report to the Illinois State Board of Education, adjusted by the 1.65 multiplier where applicable).
• The split of the difference between (a) the school's adjusted enrollment and (b) the average adjusted enrollment of all opponents after throwing out the high and the low.

The largest 32 schools based on the football enrollment figures are placed in Class 8A, the next largest in Class 7A, and so on down to Class 1A. If a tie should occur for the final spot in a particular class, a coin flip is used to break the tie.

It is important to remember that a school's classification is not determined until the 256-team field has been selected on the final day of the season. The classes used in the Associated Press polls are a "best guess" at the final determinations, but they are unofficial and can be misleading. The fact that the AP ranks a school all season in a certain class has no bearing on the school's ultimate classification in the state playoffs. This can be determined only at season's end, after the entire 256-team field is selected.

The chart below shows the enrollment cutoffs for the 256-team field prior to the implementation of the multiplier: 

The chart below shows the enrollment cutoffs for the 256-team field after the implementation of the multiplier. The first year the multiplier was in effect 2005), it did not apply to schools with enrollments less than 450 and certain other schools.  

Once the 32 teams in a particular class are determined, they are grouped manually by the IHSA Office. Each class is grouped into two halves of 16 teams based on the general location of the schools within that class.

Then, within each half, the seeds are determined by sorting the teams by two of the factors used to determine playoff berths:

• Total wins
• Combined wins of all opponents (known as "playoff points")

If two or more teams are tied for a particular seed, the following tiebreakers are applied:

• Head-to-head record (if exactly two teams are tied)
• Conference standing (if none of the tied teams is an independent).  Ties in conference standing are not broken, except that a single champion is determined according to conference rules, as mentioned in the first section.
• Random selection by computer

If, in any half, the natural first-round pairings (1 vs. 16, 2 vs. 15, etc.) result in two or more trips exceeding 150 miles, an attempt will be made to re-pair the 16 teams into quadrants of eight teams each. If, in these quadrants, the natural first-round pairings (1 vs. 8, 2 vs. 7, etc.) do not eliminate more than half of the 150-mile trips, the attempt will be abandoned and the original pairings using all 16 teams will be used.

A school's ranking in the Associated Press poll has no bearing on its seed in the IHSA Football Playoffs. The only criteria used to seed the teams are those mentioned above.

In the first round, the higher seed hosts the game. In subsequent rounds, the school that has hosted fewer times during the current playoff series hosts the game.

If both teams have hosted an equal number of times, the higher seed hosts in the second round, the quarterfinal round, and in any semifinal where the bracket was paired 1 through 16. But in a semifinal game where the bracket was paired in two groups of eight, the team with the highest seeding criteria at the end of the regular season (wins, playoff points, conference standing, etc., as listed above) is the host. If all these criteria are equal, the team on the top of the bracket is the host.

When circumstances warrant, a site other than the designated host school’s field may be requested by either school and may be used subject to the approval of the IHSA Board of Directors and the host school.

The game must be played on Saturday, unless both schools agree to play the game on Friday. The host school then sets the time of the game. Friday games must not be scheduled during school hours. Saturday games must start between 1 pm and 7 pm.

For the state championship game at Memorial Stadium in Champaign, the team on the top of the bracket is the home team and occupies the west grandstand.