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Halo Posner

BJJ ROTTERDAM

W–L
8–3
Won and lost rating-eligible matches in the past 12 months.
Gi
1,380
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
7–3
Results from the ten most recent rating-eligible matches.
Opponents
10
Unique opponents faced in rating-eligible matches in the past 12 months.

Honours

Medals and placements

Gold
1
Silver
1
Bronze
1
Total medals
3
Events with results
3

Full career record

Wins
8
Losses
3
Matches
11
Win rate
72.7%

Ways of winning

Submission
6
Points
2
Decision
0
Disqualification
0

Personal records

Longest winning streak
6
Longest submission streak
5
Longest gold streak
1

Recent recorded placements

12-month performance profile

How the results were achieved

Past 12 months
Current win streak
1
Unique opponents
10
Distinct events
3

Ways of winning

  • Submission 6 75%
  • Points 2 25%
  • Decision 0 0%
  • Other recorded result 0 0%

Gi versus No-Gi

Gi

Rating
1380
Record
8–3
Win rate
73%
Submission share
75%

No-Gi

Rating
-
Record
-
Win rate
-
Submission share
-

Win quality

Grouped by pre-match win probability. This provides context and does not award an extra rating bonus.

As underdog 0–0 Less than 35% expected win probability before the match.
Even match 0–0 Between 35% and 65% expected win probability before the match.
As favourite 0–0 More than 65% expected win probability before the match.

Development

Rating and development

The same published rating, supported by trend, opponent strength and evidence quality.

Current rating
1,380
Change over 90 days
+162
Highest rating in 12 months
1,381
Performance versus expectation
+10.8 pp
Schedule strength
Top 97%
Average opponent rating
1,230
Weighted win rate
72%
Expected win rate
61%
Repeat-opponent share
9%
Effective evidence
7.5
Confidence
82/100

Opponents

Opposition and rivalries

The strongest recorded win, rematches and opponents faced repeatedly.

Rematches 2–0 2–0 across 2 rematches against 1 repeat opponents.

Top 10 highest-ranked defeated opponents

Past 12 months

  1. #770 Jerome Van Leeuwen · The Future League 9 - Gi & NoGi Sub 00:42 2–0
  2. #1435 Hovhannes Hovhannisyan · Nijmegen Open BJJ 2026 Pts 9–0 Earlier · Sub 00:45 6–0 March 22, 2026 · The Future League 9 - Gi & NoGi

Full career

  1. #770 Jerome Van Leeuwen · The Future League 9 - Gi & NoGi Sub 00:42 2–0
  2. #1435 Hovhannes Hovhannisyan · Nijmegen Open BJJ 2026 Pts 9–0 Earlier · Sub 00:45 6–0 March 22, 2026 · The Future League 9 - Gi & NoGi

Rivals

Opponent Head-to-head record Matches

Around this athlete

Athlete Rank Rating
Ismail Ceman #484 1,381
Halo Posner #485 1,380
Khayrullah Adaev #486 1,380

Scheduled

Recent tournaments

  2. The Future League 9 - Gi & NoGi

    March 22, 2026 · Gi · ≤45 kg
    Gi 3–0

  3. The Future League 8 – Gi & No-Gi

    November 30, 2025 · Gi · ≤20 kg
    Gi 2–2

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 1,380

Rating-period composition

Rating matches
11 0
Record
8–3 Previous month 8–3
Opponents
10 0
Events
3 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 1,380

Rating-period composition

Rating matches
11 0
Record
8–3 Previous month 8–3
Opponents
10 0
Events
3 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 -1 Rating 1,380

Rating-period composition

Rating matches
11 0
Record
8–3 Previous month 8–3
Opponents
10 0
Events
3 0

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

May 2026 4 new matches Change +40 Rating 1,381

Rating-period composition

Rating matches
11 +4
Record
8–3 Previous month 5–2
Opponents
10 +3
Events
3 +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.
Win
Nijmegen Open BJJ 2026 Kids / 10 - 12 years boys / White / -55 kg
Method Points 03:00 9–0
Marginal influence +7
Loss
May 30, 2026 Jackson Hendriks
Nijmegen Open BJJ 2026 Kids / 10 - 12 years boys / White / -55 kg
Method Submission 01:39 0–6
Marginal influence -22
Win
May 30, 2026 Abdullah Balfoort
Nijmegen Open BJJ 2026 Kids / 10 - 12 years boys / White / -55 kg
Method Points 03:00 2–0
Marginal influence +18
Win
Nijmegen Open BJJ 2026 Kids / 10 - 12 years boys / White / -55 kg
Method Submission 01:05 7–0
Marginal influence +10
April 2026 No new matches Change +5 Rating 1,341

Rating-period composition

Rating matches
7 0
Record
5–2 Previous month 5–2
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.

March 2026 3 new matches Change +118 Rating 1,336

Rating-period composition

Rating matches
7 +3
Record
5–2 Previous month 2–2
Opponents
7 +3
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.
Win
The Future League 9 - Gi & NoGi Gi - 45
Method Submission 00:45 6–0
Marginal influence +8
Win
March 22, 2026 Kane Ramschie
The Future League 9 - Gi & NoGi Gi - 45
Method Submission 03:00 15–0
Marginal influence +16
Win
March 22, 2026 Jerome Van Leeuwen
The Future League 9 - Gi & NoGi Gi - 45
Method Submission 00:42 2–0
Marginal influence +26
February 2026 No new matches Change 0 Rating 1,218

Rating-period composition

Rating matches
4 0
Record
2–2 Previous month 2–2
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.

January 2026 No new matches Change -1 Rating 1,218

Rating-period composition

Rating matches
4 0
Record
2–2 Previous month 2–2
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.

December 2025 No new matches Change 0 Rating 1,219

Rating-period composition

Rating matches
4 0
Record
2–2 Previous month 2–2
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.

November 2025 4 new matches Change Starting point Rating 1,219

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.
Win
November 30, 2025 Matthew Loubser
The Future League 8 – Gi & No-Gi Gi-20
Method Submission 00:56 12–0
Marginal influence +11
Loss
November 30, 2025 Rahsul Rooi
The Future League 8 – Gi & No-Gi Gi-20
Method Decision 03:00 4–4
Marginal influence -22
Loss
November 30, 2025 Sam Van Den Top
The Future League 8 – Gi & No-Gi Gi-20
Method Points 03:00 4–12
Marginal influence -26
Win
November 30, 2025 Kaije Zoontjens
The Future League 8 – Gi & No-Gi Gi-20
Method Submission 00:32 6–2
Marginal influence +15
Relevant matches
7.5
Official ranking percentile
Top 33%
Performance
10.8 pp above expectation

7.5 weighted matches against 10 different opponents across 3 events

Weighted win rate
71.7%
Expected win rate
60.9%
Average opponent rating
1,230
Repeated-opponent share
9.1%
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 2 event votes Selected outcome

Registrations and outcomes

Nijmegen Open BJJ 2026
U14 · Counts
Kids / 10 - 12 years boys / White / -55 kg
  • Competition age 12
  • Registered age: u12
  • Source category: u12
The Future League 9 - Gi & NoGi
U14 · Counts
Gi - 45
  • Competition age 12
  • Registered age: u14
  • Source category: u14
The Future League 8 – Gi & No-Gi
Does not count
Gi-20
  • Competition age 11
  • Registered age: u14
  • Source category: u14

Classification evidence

Why ≤ 55 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

  • ≤ 55 kg 1 competition event Selected outcome

Registrations and outcomes

Nijmegen Open BJJ 2026
≤ 55 kg · Counts as a competition event
Kids / 10 - 12 years boys / White / -55 kg
  • Registered weight class: -55 kg
  • Source competition limit: -55 kg

4 matches in the rating period

The Future League 9 - Gi & NoGi
Does not count
Gi - 45

3 matches in the rating period · weight class could not be normalized reliably

The Future League 8 – Gi & No-Gi
Does not count
Gi-20

4 matches in the rating period · weight class could not be normalized reliably

Classification evidence

Why White?

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

  • white 4 matches in the rating period Selected outcome

Registrations and outcomes

Nijmegen Open BJJ 2026
white · Counts as a match
Kids / 10 - 12 years boys / White / -55 kg
  • Source belt category: white

4 matches in the rating period