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Luuk Birkner

CJJF Germany

W–L
1–1
Won and lost rating-eligible matches in the past 12 months.
Gi
1,198
Rating based on Gi matches in the past 12 months.
No-Gi
-
Rating based on No-Gi matches in the past 12 months.
Current form
1–1
Results from the ten most recent rating-eligible matches.
Opponents
2
Unique opponents faced in rating-eligible matches in the past 12 months.

Indexed career

Matches

2
Indexed competition matches
Date Opponent Result Event Division
2026-06-20 Tim Niedzwetzki
Loss
Pandamania Summercup 2026 (Kids & Teens) Gi · Teens (12-15 Jahre) - Gi / Boys / -70 kg
2026-06-20 Lennard Klein
Win
Pandamania Summercup 2026 (Kids & Teens) Gi · Teens (12-15 Jahre) - Gi / Boys / -70 kg

Calculation details

Rating breakdown for the past 12 months

See the published month-end rating and the rating-eligible matches added in each month. Open a month for details.

August 2026 No new matches Change 0 Rating 1,198

Rating-period composition

Rating matches
2 0
Record
1–1 Previous month 1–1
Opponents
2 0
Events
1 0

No matches were added or left the period. The change comes from the monthly revaluation of opponents across the full network.

July 2026 No new matches Change 0 Rating 1,198

Rating-period composition

Rating matches
2 0
Record
1–1 Previous month 1–1
Opponents
2 0
Events
1 0

No matches were added or left the period. The change comes from the monthly revaluation of opponents across the full network.

June 2026 2 new matches Change Starting point Rating 1,198

New rating matches

This is a current what-if estimate: roughly how much the current rating changes when this match is omitted. These values cannot be added and therefore do not together explain the monthly change.
Loss
June 20, 2026 Tim Niedzwetzki
Pandamania Summercup 2026 (Kids & Teens) Teens (12-15 Jahre) - Gi / Boys / -70 kg
Method Submission 01:13 0–9
Marginal influence -46
Win
June 20, 2026 Lennard Klein
Pandamania Summercup 2026 (Kids & Teens) Teens (12-15 Jahre) - Gi / Boys / -70 kg
Method Points 04:00 7–0
Marginal influence +40
Relevant matches
1.7
Official ranking percentile
-
Performance
-

1.7 weighted matches against 2 different opponents across 1 events

Weighted win rate
-
Expected win rate
-
Average opponent rating
1,210
Repeated-opponent share
0.0%
Network connectivity
87.6%

Classification evidence

Why U16?

Within the published period from 2025-09-01 through 2026-08-31, only competition ages recorded at events in the calculation year determine this outcome, with at most one vote per event. Without such an age, the most recent unambiguous earlier competition age is projected to the calculation year; bracket evidence is the final fallback. The newest evidence breaks a tie.

Evidence outcome

  • U16 1 event vote Selected outcome

Registrations and outcomes

LET´S ROLL HENNEF | EBI SUB-ONLY
Does not count
Men +18 years No-Gi / Novice / Adults / -83 kg
  • Competition age 14
Pandamania Summercup 2026 (Kids & Teens)
U16 · Counts
Teens (12-15 Jahre) - Gi / Boys / -70 kg
  • Competition age 14

Classification evidence

Why ≤ 70 kg?

This outcome uses at most one unambiguous upper weight limit per completed ranking event from 2025-09-01 through 2026-08-31. Only the three most recent eligible events are considered, and the lightest verified upper limit is selected. A higher division is not treated as measured body weight.

Evidence outcome

  • ≤ 70 kg 1 competition event Selected outcome

Registrations and outcomes

LET´S ROLL HENNEF | EBI SUB-ONLY
Does not count
Men +18 years No-Gi / Novice / Adults / -83 kg
  • Registered weight class: -83 kg
  • Source competition limit: -83 kg

No matches in the rating period · no valid weight evidence

Pandamania Summercup 2026 (Kids & Teens)
≤ 70 kg · Counts as a competition event
Teens (12-15 Jahre) - Gi / Boys / -70 kg
  • Registered weight class: -70 kg
  • Source competition limit: -70 kg

2 matches in the rating period