Last checked: August 2026 · Written by the player-led team at Badminton House
Quick answer: read the rules before the bracket
Find the event's own dated regulations first. Use accepted entries, not bracket capacity, to choose the seed-count row; place fixed and grouped seeds exactly as directed; then calculate byes from bracket capacity minus actual entries. A 24-entry field uses eight byes, but it does not always use eight seeds.
Rules
Start here: confirm the governing body, competition type and effective date.
Entries
Use the number of accepted players or pairs when reading the seed scale.
Seeds
Place fixed seeds first, then draw grouped seeds by lot into their assigned sections.
Byes
Subtract actual entries from the next power-of-two bracket capacity.
When someone says a badminton draw has “eight seeds,” the essential missing words are “under which regulations?” The same 24-entry field maps to eight seeds in Badminton Scotland's 2026 table and four seeds in the BWF technical table in force from 1 January 2018. That is a scope and version difference, not a mathematical contradiction.
Related reading: Learn how ranking points create an ordered list in our BWF world-ranking guide, or compare knockout play with a badminton round-robin format.
Ranking and seeding do different jobs
Ranking and seeding use related information, but they answer different questions. Ranking orders players or pairs on a published list; seeding selects a limited number of accepted entries and assigns them designated starting areas in one event's draw. Always identify the ranking snapshot and event regulation before attaching a seed number.
| Term | Question it answers | What to check |
|---|---|---|
| Ranking | What is the published order of players or pairs? | List, discipline, ranking date and eligibility rules |
| Seeding | Which accepted entries receive seed designations in this draw? | Seed scale, accepted field and draw-placement rules |
For one concrete example, Badminton Scotland's 2026 General Competition Regulations say selection and seeding use the national ranking list from three weeks before the event. Doubles use the pair's average ranking. Those details describe that regulation set, not every badminton tournament.
A seed number is therefore an event label, not a second permanent ranking. Start with the eligible, accepted field and the prescribed ranking snapshot; then apply the event's seed-count scale.
Read the event's dated seed scale
Use the number of actual accepted entries to enter the seed scale, then confirm the scale's scope and date. Do not substitute the bracket's next power-of-two capacity. In Badminton Scotland's 2026 regulations, 24 accepted entries fall in the 24–47 band, so a covered knockout event uses eight seeds.
| Accepted entries | Seeds under the 2026 Badminton Scotland scale |
|---|---|
| 3–11 | 2 |
| 12–23 | 4 |
| 24–47 | 8 |
| 48–64 | 16 |
That table applies within the document's stated scope: Badminton Scotland-sanctioned tournaments, apart from BWF or Badminton Europe international tournaments and any published event-specific variation. It is a useful current example, not a universal badminton seed scale.
Keep “entries” and “draw lines” in separate columns on your worksheet. Twenty-four accepted entries need a 32-line knockout bracket, but the Scottish seed count still comes from the 24-entry row rather than the 32-entry row.
Place seed groups in their assigned sections
Seed numbers do not simply occupy the first lines of the bracket. Seed 1 goes at the top and seed 2 at the bottom; the 3–4 group is drawn by lot between designated quarter positions, and the 5–8 group is drawn by lot among designated eighth positions.
Badminton Scotland regulations 6.11.2 and 6.11.3 make that distinction explicit: the first two positions are fixed, while later seed groups are allocated by lot within their permitted slots. For a 32-line Scottish draw, Appendix B gives these positions:
| Seed group | Permitted draw positions | Placement method |
|---|---|---|
| Seed 1 | 1 | Fixed at the top |
| Seed 2 | 32 | Fixed at the bottom |
| Seeds 3–4 | 9 and 24 | Drawn by lot between the two quarter positions |
| Seeds 5–8 | 5, 13, 20 and 28 | Drawn by lot among the four eighth positions |
“Seeds 3–4 at positions 9 and 24” does not mean seed 3 automatically takes line 9. It means one member of that seed group goes to each listed position, with the assignment decided by lot. The same logic applies to seeds 5–8.
This procedure distributes selected entries across bracket sections. It does not certify that every quarter is equally strong: the remaining entries are drawn into the open positions, and the table makes no promise about their relative strength.
Worked example: 24 entries on 32 draw lines
A 24-entry knockout draw needs 32 bracket lines because 32 is the next power of two. The eight unused lines are byes: 32 minus 24 equals eight. That arithmetic does not choose the seed count, as the current Scottish table and the older BWF technical table demonstrate.
The official BWF Section 5.3.8 technical table, marked in force from 1 January 2018, gives four seeds for exactly 24 entries. Badminton Scotland's 2026 Appendix B gives eight. Both use a 32-line sheet and eight byes.
| 24-entry detail | Badminton Scotland 2026 | BWF Section 5.3.8, in force 2018 |
|---|---|---|
| Draw capacity | 32 lines | 32 lines |
| Number of seeds | 8 | 4 |
| Seed positions | 1; 32; 9 and 24; 5, 13, 20 and 28 | 1; 32; 9 and 24 |
| Number of byes | 8 | 8 |
| Bye positions | 2, 6, 10, 14, 19, 23, 27 and 31 | 2, 6, 10, 14, 19, 23, 27 and 31 |
Using the Scottish table, the draw sequence is straightforward:
- Open 32 numbered lines for the 24 accepted entries.
- Place seeds 1 and 2 at lines 1 and 32.
- Draw seeds 3–4 by lot between lines 9 and 24.
- Draw seeds 5–8 by lot among lines 5, 13, 20 and 28.
- Mark the eight bye lines at 2, 6, 10, 14, 19, 23, 27 and 31.
- Draw the 16 unseeded entries by lot into the remaining open entry positions.
Eight entrants advance through byes, while the other 16 entrants play eight first-round matches. Those eight winners join the eight bye recipients to create a full round of 16. A bye is automatic advancement for that round; it is not another seed designation.
Do not combine the Scottish eight-seed row with the BWF four-seed labels and call the result one official method. Pick the regulation that governs the event, then use its seed count and placement table together.
Audit a published draw in five checks
To audit a draw, work from documents to bracket, not from seed labels backwards. Confirm the regulation and ranking date, count accepted entries, choose the bracket capacity, read the matching seed row, then check every fixed position, lot group and bye. A neat-looking bracket can still use the wrong table.
Your five-line draw audit
- Authority: Which governing body or event terms control this draw, and what date or version applies?
- Field: How many eligible entries were actually accepted?
- Capacity: What is the next power-of-two bracket size?
- Seeds: Which entry band applies, and which placements are fixed or drawn by lot?
- Byes: Does bracket capacity minus accepted entries match the listed bye count and positions?
If a 24-entry event states that the 2026 Badminton Scotland regulations apply, eight seeds are the default shown in that table unless published event-specific terms say otherwise. If an event explicitly applies the BWF 2018 technical table, four seeds can be correct for the same number of entries.
That is the central lesson: ranking supplies an order, the event's dated rules select a seed count, the placement table distributes seed groups, and bracket arithmetic supplies the byes. Keep those four steps separate and the draw becomes much easier to read.
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