51 team knockout fixture

51 teams: 13 byes, 38 teams play Round I, 50 matches over 6 rounds.

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How the 51 team fixture is drawn

Upper half and lower half

51 is odd, so the upper half gets (51 + 1) ÷ 2 = 26 teams (Teams 1–26) and the lower half gets (51 − 1) ÷ 2 = 25 teams (Teams 27–51).

Byes

Byes = next power of 2 − number of teams = 64 − 51 = 13. 13 is odd, so the upper half gets (13 − 1) ÷ 2 = 6 byes and the lower half gets (13 + 1) ÷ 2 = 7 byes.

Which teams get the byes, and why

The textbook places byes in this order: the 1st bye to the last team of the lower half, the 2nd to the first team of the upper half, the 3rd to the first team of the lower half and the 4th to the last team of the upper half. The remaining byes follow the same pattern, moving inward. For 51 teams:

  1. Team 51 — last team of the lower half
  2. Team 1 — first team of the upper half
  3. Team 27 — first team of the lower half
  4. Team 26 — last team of the upper half
  5. Team 50 — 2nd-last team of the lower half
  6. Team 2 — 2nd team of the upper half
  7. Team 28 — 2nd team of the lower half
  8. Team 25 — 2nd-last team of the upper half
  9. Team 49 — 3rd-last team of the lower half
  10. Team 3 — 3rd team of the upper half
  11. Team 29 — 3rd team of the lower half
  12. Team 24 — 3rd-last team of the upper half
  13. Team 48 — 4th-last team of the lower half

Teams with a bye do not play Round I. They go straight to Round II.

Round I and total matches

51 − 13 = 38 teams play Round I in 19 matches:

  • Match 1: Team 4 vs Team 5
  • Match 2: Team 6 vs Team 7
  • Match 3: Team 8 vs Team 9
  • Match 4: Team 10 vs Team 11
  • Match 5: Team 12 vs Team 13
  • Match 6: Team 14 vs Team 15
  • Match 7: Team 16 vs Team 17
  • Match 8: Team 18 vs Team 19
  • Match 9: Team 20 vs Team 21
  • Match 10: Team 22 vs Team 23
  • Match 11: Team 30 vs Team 31
  • Match 12: Team 32 vs Team 33
  • Match 13: Team 34 vs Team 35
  • Match 14: Team 36 vs Team 37
  • Match 15: Team 38 vs Team 39
  • Match 16: Team 40 vs Team 41
  • Match 17: Team 42 vs Team 43
  • Match 18: Team 44 vs Team 45
  • Match 19: Team 46 vs Team 47

Total number of matches = number of teams − 1 = 51 − 1 = 50 (not including a third-place match). There are 6 rounds, because 64 = 2 × 2 × 2 × 2 × 2 × 2 — worked out from the textbook illustrations, not a textbook formula.

Print or save as PDF

Tap “Print fixture (A4)” and choose “Save as PDF” as the printer to get a 51 team knockout fixture PDF. The bracket prints on 2 A4 pages (upper half, then lower half) in portrait.

Questions

How many byes are there in a 51 team knockout fixture?

Byes = next power of 2 − number of teams = 64 − 51 = 13. 13 is odd, so the upper half gets (13 − 1) ÷ 2 = 6 byes and the lower half gets (13 + 1) ÷ 2 = 7 byes. The byes go, in order, to teams 51, 1, 27, 26, 50, 2, 28, 25, 49, 3, 29, 24 and 48. These teams do not play Round I and go straight to Round II.

How many matches and rounds are there for 51 teams?

Total number of matches = number of teams − 1 = 51 − 1 = 50, not including a third-place match. There are 6 rounds, because 64 = 2 × 2 × 2 × 2 × 2 × 2 (worked out from the textbook illustrations, not a textbook formula).

How are 51 teams divided into the upper and lower half?

51 is odd, so the upper half gets (51 + 1) ÷ 2 = 26 teams (Teams 1–26) and the lower half gets (51 − 1) ÷ 2 = 25 teams (Teams 27–51).

Can I print the 51 team knockout fixture or save it as a PDF?

Yes. Tap “Print fixture (A4)” and choose “Save as PDF” as the printer to get a 51 team knockout fixture PDF. The bracket prints on 2 A4 pages (upper half, then lower half) in portrait.