The Final Round Ciphering Tournament

Of

The Alabama Statewide Mathematics Contest

The final round ciphering tournament of the contest is by invitation based on the results of the first round written comprehensive tests. The criteria for qualifying for the final round can be found in the contest brochure. Qualifying teams receive their invitations in the mail along with the results of the first round written tests. The invitation includes maps, a hotel list, a detailed description of the tournament, and a copy of the previous year's ciphering questions. (These are also available on the contest web site.) The tournament is held on a Saturday in April at Jacksonville State University in Jacksonville, Alabama.

Of course, there are actually three separate tournaments run in parallel, one for each of the three divisions. Each tournament consists of five rounds and is typically scheduled about like this:

7:40 AM : Brief meeting with sponsors to take attendance, go over rules, and answer any questions.

8:10 AM: Round 1

8:50 AM: Round 2

9:30 AM: Round 3

10:10 AM: Round 4

10:50 AM: Round 5

11:30 AM: Brief awards ceremony where team and individual trophies and plaques from the first and second round of the contest are presented.

The ciphering tournament follows an unusual format, which was created especially for this contest because none of the standard tournament designs seem to be satisfactory for us. The tournament format most equitable to all teams is a round-robin tournament, in which every team plays every other team "one on one". Since we invite up to 16 teams in each division and we have less than four hours in which to execute the entire tournament, we do not have time for this. For many years, a Swiss tournament was used for the contest. These tournaments, which are commonly used in chess and bridge, allow an equitable tournament in fewer rounds than a round robin without eliminating teams, but not so few rounds that we can ensure accurate placings in all the trophy winning positions (#1 - #4) in the time we have available. Elimination tournaments are not satisfactory because they are not fair to teams which come a great distance to compete in the tournament and end up playing very few rounds.

The format of the tournament (or rather of the three separate tournaments which take place in each division) is as follows:

Round 1

ROOMS

TEAMS

Room 1

1 5 9 13

Room 2

2 6 10 14

Room 3

3 7 11 15

Room 4

4 8 12 16

Round 2

ROOMS

TEAMS

Room 1

1 6 11 16

Room 2

2 5 12 15

Room 3

3 8 9 14

Room 4

4 7 10 13

Round 3

ROOMS

TEAMS

Room 1

1 8 10 15

Room 2

2 7 9 16

Room 3

3 6 12 13

Room 4

4 5 11 14

Round 4

ROOMS

TEAMS

Room 1

1 7 12 14

Room 2

2 8 11 13

Room 3

3 5 10 16

Room 4

4 6 9 15

 Round 5

ROOMS

TEAMS

Room 1

1 2 3 4

Room 2

5 6 7 8

Room 3

9 10 11 12

Room 4

13 14 15 16

 

Advantages of this tournament