Information
Total Members: 18
Members per group: 3
Circulation times for covering: 10
Example of combinations
| set | group 1 | group 2 | group 3 | group 4 | group 5 | group 6 |
|---|
| 1 | 1, 2, 3 | 4, 5, 6 | 7, 8, 9 | 10, 11, 12 | 13, 14, 15 | 16, 17, 18 |
|---|
| 2 | 4, 12, 17 | 1, 14, 18 | 3, 5, 16 | 2, 9, 13 | 6, 8, 10 | 7, 11, 15 |
|---|
| 3 | 3, 10, 14 | 6, 13, 17 | 2, 4, 15 | 5, 7, 18 | 9, 11, 16 | 1, 8, 12 |
|---|
| 4 | 5, 12, 13 | 2, 10, 18 | 1, 6, 11 | 8, 15, 16 | 3, 7, 17 | 4, 9, 14 |
|---|
| 5 | 11, 13, 18 | 12, 14, 16 | 10, 15, 17 | 1, 4, 7 | 2, 5, 8 | 3, 6, 9 |
|---|
| 6 | 6, 7, 14 | 3, 12, 15 | 4, 8, 18 | 2, 11, 17 | 5, 9, 10 | 1, 13, 16 |
|---|
| 7 | 1, 5, 15 | 3, 4, 11 | 9, 12, 18 | 8, 14, 17 | 2, 6, 16 | 7, 10, 13 |
|---|
| 8 | 4, 10, 16 | 1, 9, 17 | 2, 7, 12 | 6, 15, 18 | 3, 8, 13 | 5, 11, 14 |
|---|
| 9 | 3, 9, 18 | 2, 8, 14 | 4, 11, 13 | 6, 12, 16 | 1, 7, 10 | 5, 15, 17 |
|---|
| 10 | 4, 7, 16 | 5, 8, 11 | 6, 17, 10 | 1, 13, 18 | 9, 12, 15 | 2, 3, 14 |
|---|
Frequency of combinations
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
|---|
| 1 | - | 1 | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 1 | 2 |
|---|
| 2 | - | - | 2 | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 1 |
|---|
| 3 | - | - | - | 1 | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 1 |
|---|
| 4 | - | - | - | - | 1 | 1 | 2 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 1 | 2 | 1 | 1 |
|---|
| 5 | - | - | - | - | - | 1 | 1 | 2 | 1 | 1 | 2 | 1 | 1 | 1 | 2 | 1 | 1 | 1 |
|---|
| 6 | - | - | - | - | - | - | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 1 |
|---|
| 7 | - | - | - | - | - | - | - | 1 | 1 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
|---|
| 8 | - | - | - | - | - | - | - | - | 1 | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 1 |
|---|
| 9 | - | - | - | - | - | - | - | - | - | 1 | 1 | 2 | 1 | 1 | 1 | 1 | 1 | 2 |
|---|
| 10 | - | - | - | - | - | - | - | - | - | - | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 1 |
|---|
| 11 | - | - | - | - | - | - | - | - | - | - | - | 1 | 2 | 1 | 1 | 1 | 1 | 1 |
|---|
| 12 | - | - | - | - | - | - | - | - | - | - | - | - | 1 | 1 | 2 | 2 | 1 | 1 |
|---|
| 13 | - | - | - | - | - | - | - | - | - | - | - | - | - | 1 | 1 | 1 | 1 | 2 |
|---|
| 14 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 1 | 1 | 1 | 1 |
|---|
| 15 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 1 | 2 | 1 |
|---|
| 16 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 1 | 1 |
|---|
| 17 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 1 |
|---|
| 18 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
|---|
Frequency of groups
| Member | group 1 | group 2 | group 3 | group 4 | group 5 | group 6 |
|---|
| 1 | 2 | 2 | 1 | 2 | 1 | 2 |
|---|
| 2 | 1 | 2 | 2 | 2 | 2 | 1 |
|---|
| 3 | 3 | 2 | 1 | 0 | 2 | 2 |
|---|
| 4 | 3 | 2 | 3 | 1 | 0 | 1 |
|---|
| 5 | 2 | 2 | 1 | 1 | 2 | 2 |
|---|
| 6 | 1 | 2 | 2 | 2 | 2 | 1 |
|---|
| 7 | 2 | 0 | 2 | 2 | 2 | 2 |
|---|
| 8 | 0 | 2 | 2 | 2 | 3 | 1 |
|---|
| 9 | 1 | 1 | 2 | 1 | 3 | 2 |
|---|
| 10 | 2 | 1 | 2 | 1 | 3 | 1 |
|---|
| 11 | 1 | 2 | 2 | 2 | 1 | 2 |
|---|
| 12 | 2 | 2 | 2 | 2 | 1 | 1 |
|---|
| 13 | 2 | 1 | 1 | 2 | 2 | 2 |
|---|
| 14 | 2 | 3 | 0 | 1 | 1 | 3 |
|---|
| 15 | 1 | 1 | 2 | 2 | 2 | 2 |
|---|
| 16 | 2 | 1 | 1 | 2 | 2 | 2 |
|---|
| 17 | 1 | 2 | 2 | 2 | 1 | 2 |
|---|
| 18 | 2 | 2 | 2 | 3 | 0 | 1 |
|---|
Links
Original link :
(Japanese: https://slpr.sakura.ne.jp/sikinote/)
(English: https://slpr.sakura.ne.jp/sikinote/en/)
References: https://ljcr.dmgordon.org/cover/table.html
http://www.mathpuzzle.com/MAA/54-Golf%20Tournaments/mathgames_08_14_07.html