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Gustav Achtenberg

Fennec Jiu Jitsu

W–L
0–4
Won and lost rating-eligible matches in the past 12 months.
Gi
1,116
Rating based on Gi matches in the past 12 months.
No-Gi
1,125
Rating based on No-Gi matches in the past 12 months.
Current form
0–6
Results from the ten most recent rating-eligible matches.
Opponents
4
Unique opponents faced in rating-eligible matches in the past 12 months.

Tournament history

Events

9
Events
Date Event Result Format Division
Grappling Industries BERLIN Germany · Gi · 14–15 yo · yellow/orange · ≤145 lb 0–2 W–L: Win / Loss Gi
  • Gi Kids / Yellow/Orange / 14 - 15 years (Male) / -145 lbs
Fennec BJJ Kids Cup Gi & NoGi Germany · Gi · U16 · orange · ≤55 kg ; No-Gi · U16 · orange · ≤60 kg 0–4 W–L: Win / Loss GiNo-Gi
  • Place #5
  • Place #4
Fennec BJJ KIDS CUP Vol. 7 Gi and NoGi Germany · Gi · U16 · green · ≤55 kg ; No-Gi · U16 · grey · ≤55 kg 4–2 W–L: Win / Loss GiNo-Gi
  • Boys Gi (under 16 y.o.) / Green / 12-13 years / -60 kg
  • Boys No-Gi (under 16 y.o.) / Grey / 12-13 years / -55 kg
Fennec BJJ Kids Cup Vol. 6 Germany · Gi · 12 yo · yellow/orange · ≥48 kg ; No-Gi · 12 yo · yellow/orange · ≤45 kg 1–3 W–L: Win / Loss GiNo-Gi
  • Boys NoGi / Junior II (11/12 yrs) / Yellow/Orange / -45.00 kg
  • Boys Gi / Junior II (11/12 yrs) / Yellow/Orange / Above 48,00 kg
Fennec BJJ Kids Cup Vol.5 Germany · Gi · 12 yo · yellow/orange · ≤48 kg ; No-Gi · 12 yo · yellow/orange · ≤45 kg 0–4 W–L: Win / Loss GiNo-Gi
  • Boys Gi / Junior II (11/12 yrs) / Yellow/Orange (bzw. 1 bis 3 Jahre Training) / -48,00 kg
  • Boys NoGi / Junior II (11/12 yrs) / Yellow/Orange (bzw. 1 bis 3 Jahre Training) / -45.00 kg
Doso Kids Cup - The Combatch Games Germany · Gi · 11 yo · grey · ≤50 kg 1–2 W–L: Win / Loss Gi
  • Teen Boys / Grey / Junior 2 (10/11yrs) / - 50 kg
Fennec BJJ Kids Cup Vol. 4 Germany · Gi · 10 yo · white/grey · ≤42 kg 3–2 W–L: Win / Loss Gi
  • Boys Gi / Junior I (9/10yrs) / White/Grey (bzw. bis 1 Jahr Training) / -42.00 kg
Doso Kids Cup Germany · Gi · 11 yo · white · ≤46 kg 3–1 W–L: Win / Loss Gi
  • Teen Boys / White / Junior 2 (10/11yrs) / -46 kg
Fennec BJJ Kids Cup Vol. 3 Germany · Gi · 10 yo · white/grey · ≤39 kg 2–1 W–L: Win / Loss Gi
  • Boys Gi / Junior I (9/10yrs) / White/Grey (bzw. bis 1 Jahr Training) / -39,00 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 1,211

Rating-period composition

Rating matches
4 0
Record
0–4 Previous month 0–4
Opponents
4 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 +1 Rating 1,211

Rating-period composition

Rating matches
4 0
Record
0–4 Previous month 0–4
Opponents
4 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 No new matches Change 0 Rating 1,210

Rating-period composition

Rating matches
4 0
Record
0–4 Previous month 0–4
Opponents
4 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.

May 2026 No new matches Change +4 Rating 1,210

Rating-period composition

Rating matches
4 0
Record
0–4 Previous month 0–4
Opponents
4 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.

April 2026 No new matches Change +2 Rating 1,206

Rating-period composition

Rating matches
4 0
Record
0–4 Previous month 0–4
Opponents
4 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.

March 2026 No new matches · 5 left period Change -71 Rating 1,204

Rating-period composition

Rating matches
4 -5
Record
0–4 Previous month 3–6
Opponents
4 -3
Events
1 -1

5 older matches left the 12-month period: 3 won and 2 lost. The rating is then recalculated across the full network, so the monthly change is not a sum of separate deductions.

February 2026 No new matches Change 0 Rating 1,275

Rating-period composition

Rating matches
9 0
Record
3–6 Previous month 3–6
Opponents
7 0
Events
2 0

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

January 2026 No new matches Change +2 Rating 1,275

Rating-period composition

Rating matches
9 0
Record
3–6 Previous month 3–6
Opponents
7 0
Events
2 0

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

December 2025 No new matches Change -4 Rating 1,273

Rating-period composition

Rating matches
9 0
Record
3–6 Previous month 3–6
Opponents
7 0
Events
2 0

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

November 2025 4 new matches · 4 left period Change -44 Rating 1,277

Rating-period composition

Rating matches
9 0
Record
3–6 Previous month 4–5
Opponents
7 0
Events
2 0

4 older matches left the 12-month period: 1 won and 3 lost. The rating is then recalculated across the full network, so the monthly change is not a sum of separate deductions.

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
November 22, 2025 Elias Benabdallah
Fennec BJJ Kids Cup Gi & NoGi Boys No-Gi (under 16 y.o.) / Orange / 12-13 years / -60 kg
Method Submission 01:34 0–5
Marginal influence -10
Loss
November 22, 2025 Ylber-Rubin Murtezi
Fennec BJJ Kids Cup Gi & NoGi Boys No-Gi (under 16 y.o.) / Orange / 12-13 years / -60 kg
Method Submission 00:36 0–2
Marginal influence -9
Loss
November 22, 2025 Joshua Maennel
Fennec BJJ Kids Cup Gi & NoGi Boys Gi (under 16 y.o.) / Orange / 12-13 years / -55 kg
Method Submission 03:03 0–7
Marginal influence -20
Loss
November 22, 2025 Khakim Umedov
Fennec BJJ Kids Cup Gi & NoGi Boys Gi (under 16 y.o.) / Orange / 12-13 years / -55 kg
Method Submission 01:41 0–4
Marginal influence -4
October 2025 No new matches Change +3 Rating 1,321

Rating-period composition

Rating matches
9 0
Record
4–5 Previous month 4–5
Opponents
7 0
Events
2 0

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

September 2025 No new matches Change 0 Rating 1,318

Rating-period composition

Rating matches
9 0
Record
4–5 Previous month 4–5
Opponents
7 0
Events
2 0

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

Relevant matches
3.4
Official ranking percentile
-
Performance
-

3.4 weighted matches against 4 different opponents across 1 events

Weighted win rate
-
Expected win rate
-
Average opponent rating
1,428
Repeated-opponent share
0.0%
Network connectivity
87.6%

Classification evidence

Why U14?

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

  • U14 1 event vote Selected outcome

Registrations and outcomes

Fennec BJJ Kids Cup Gi & NoGi
U14 · Counts
Boys No-Gi (under 16 y.o.) / Orange / 12-13 years / -60 kg
  • Competition age 12
  • Registered age: u14
  • Source category: u14
Boys Gi (under 16 y.o.) / Orange / 12-13 years / -55 kg
  • Competition age 12
  • Registered age: u14
  • Source category: u14

Classification evidence

Why Orange?

This outcome uses the belt category of every rating-eligible match from 2025-09-01 through 2026-08-31. The most-fought category is selected; the newest evidence breaks a tie.

Evidence outcome

  • orange 6 matches in the rating period Selected outcome

Registrations and outcomes

Grappling Industries BERLIN
orange · Counts as a match
Gi Kids / Yellow/Orange / 14 - 15 years (Male) / -145 lbs
  • Source belt category: orange

2 matches in the rating period

Fennec BJJ Kids Cup Gi & NoGi
orange · Counts as a match
Boys No-Gi (under 16 y.o.) / Orange / 12-13 years / -60 kg
  • Source belt category: orange

2 matches in the rating period

Fennec BJJ Kids Cup Gi & NoGi
orange · Counts as a match
Boys Gi (under 16 y.o.) / Orange / 12-13 years / -55 kg
  • Source belt category: orange

2 matches in the rating period