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Aren Koc

Satsang BJJ

W–L
1–3
Won and lost rating-eligible matches in the past 12 months.
Gi
1,134
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
1–3
Results from the ten most recent rating-eligible matches.
Opponents
4
Unique opponents faced in rating-eligible matches in the past 12 months.

Indexed career

Matches

4
Indexed competition matches
Date Opponent Result Event Division
2026-05-23 Aura Lee
Loss
GrappleCity: Rotterdam Summer Open Gi · Kids Gi / Grey / Kids 8-9 years / -30kg
2026-05-23 Lucienna Mascini
Loss
GrappleCity: Rotterdam Summer Open Gi · Kids Gi / Grey / Kids 8-9 years / -30kg
2026-02-22 Dempsey Makatita
Loss
GrappleCity: Rotterdam Spring Open Gi · Kids Gi / White / Kids 8-9 years / -25kg
2026-02-22 Isaac O'Mahony
Win
GrappleCity: Rotterdam Spring Open Gi · Kids Gi / White / Kids 8-9 years / -25kg

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 1,134

Rating-period composition

Rating matches
4 0
Record
1–3 Previous month 1–3
Opponents
4 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.

July 2026 No new matches Change 0 Rating 1,134

Rating-period composition

Rating matches
4 0
Record
1–3 Previous month 1–3
Opponents
4 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.

June 2026 No new matches Change -2 Rating 1,134

Rating-period composition

Rating matches
4 0
Record
1–3 Previous month 1–3
Opponents
4 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.

May 2026 2 new matches Change -59 Rating 1,136

Rating-period composition

Rating matches
4 +2
Record
1–3 Previous month 1–1
Opponents
4 +2
Events
2 +1

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
May 23, 2026 Aura Lee
GrappleCity: Rotterdam Summer Open Kids Gi / Grey / Kids 8-9 years / -30kg
Method Decision 03:00 0–0
Marginal influence -44
Loss
May 23, 2026 Lucienna Mascini
GrappleCity: Rotterdam Summer Open Kids Gi / Grey / Kids 8-9 years / -30kg
Method Points 03:00 0–6
Marginal influence -38
April 2026 No new matches Change 0 Rating 1,195

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.

March 2026 No new matches Change -1 Rating 1,195

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.

February 2026 2 new matches Change Starting point Rating 1,196

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
February 22, 2026 Dempsey Makatita
GrappleCity: Rotterdam Spring Open Kids Gi / White / Kids 8-9 years / -25kg
Method Submission 00:30 0–6
Marginal influence -29
Win
February 22, 2026 Isaac O'Mahony
GrappleCity: Rotterdam Spring Open Kids Gi / White / Kids 8-9 years / -25kg
Method Submission 00:30 2–0
Marginal influence +46
Relevant matches
3.4
Official ranking percentile
-
Performance
-

3.4 weighted matches against 4 different opponents across 2 events

Weighted win rate
-
Expected win rate
-
Average opponent rating
1,176
Repeated-opponent share
0.0%
Network connectivity
87.6%

Classification evidence

Why U10?

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

  • U10 2 event votes Selected outcome

Registrations and outcomes

GrappleCity: Rotterdam Summer Open
U10 · Counts
Kids Gi / Grey / Kids 8-9 years / -30kg
  • Competition age 9
  • Registered age: u10
  • Source category: u10
GrappleCity: Rotterdam Spring Open
U10 · Counts
Kids NoGi / White / Kids 6-7 years / -30kg
  • Competition age 9
  • Registered age: u8
  • Source category: u8
Kids Gi / White / Kids 8-9 years / -25kg
  • Competition age 9
  • Registered age: u10
  • Source category: u10

Classification evidence

Why ≤ 25 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

  • ≤ 25 kg 1 competition event Selected outcome
  • ≤ 30 kg 1 competition event

Registrations and outcomes

GrappleCity: Rotterdam Summer Open
≤ 30 kg · Counts as a competition event
Kids Gi / Grey / Kids 8-9 years / -30kg
  • Registered weight class: -30kg
  • Source competition limit: -30kg

2 matches in the rating period

GrappleCity: Rotterdam Spring Open
Does not count
Kids NoGi / White / Kids 6-7 years / -30kg
  • Registered weight class: -30kg
  • Source competition limit: -30kg

No matches in the rating period · no valid weight evidence

GrappleCity: Rotterdam Spring Open
≤ 25 kg · Counts as a competition event
Kids Gi / White / Kids 8-9 years / -25kg
  • Registered weight class: -25kg
  • Source competition limit: -25kg

2 matches in the rating period

Classification evidence

Why Grey?

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

  • grey 2 matches in the rating period Selected outcome
  • white 2 matches in the rating period

Registrations and outcomes

GrappleCity: Rotterdam Summer Open
grey · Counts as a match
Kids Gi / Grey / Kids 8-9 years / -30kg
  • Source belt category: grey

2 matches in the rating period

GrappleCity: Rotterdam Spring Open
white · Counts as a match
Kids Gi / White / Kids 8-9 years / -25kg
  • Source belt category: white

2 matches in the rating period