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Bosse De Jonge

Haven BJJ

W–L
3–3
Won and lost rating-eligible matches in the past 12 months.
Gi
1,251
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
3–3
Results from the ten most recent rating-eligible matches.
Opponents
6
Unique opponents faced in rating-eligible matches in the past 12 months.

Honours

Medals and placements

Gold
0
Silver
2
Bronze
0
Total medals
2
Events with results
3

Full career record

Wins
5
Losses
4
Matches
9
Win rate
55.6%

Ways of winning

Submission
1
Points
3
Decision
1
Disqualification
0

Personal records

Longest winning streak
2
Longest submission streak
1

Recent recorded placements

12-month performance profile

How the results were achieved

Past 12 months
Current win streak
1
Unique opponents
6
Distinct events
2

Ways of winning

  • Submission 1 33%
  • Points 1 33%
  • Decision 1 33%
  • Other recorded result 0 0%

Gi versus No-Gi

Gi

Rating
1251
Record
3–3
Win rate
50%
Submission share
33%

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
1,251
Change over 90 days
+40
Highest rating in 12 months
1,251
Performance versus expectation
-
Schedule strength
-
Average opponent rating
1,268
Weighted win rate
-
Expected win rate
-
Repeat-opponent share
0%
Effective evidence
4.5
Confidence
65/100

Opponents

Opposition and rivalries

The strongest recorded win, rematches and opponents faced repeatedly.

Top 10 highest-ranked defeated opponents

Past 12 months

  1. #1017 Adrian Maier · Lion Cub Jiu Jitsu Competition 6 Dec 0–0
  2. #1311 Jayvo Hermans · Lion Cub Jiu Jitsu Competition 6 Pts 9–0

Full career

  1. #717 Anis Boukhzar · Lion Cub Jiu Jitsu Competition 4 Pts 12–0
  2. #1017 Adrian Maier · Lion Cub Jiu Jitsu Competition 6 Dec 0–0
  3. #1311 Jayvo Hermans · Lion Cub Jiu Jitsu Competition 6 Pts 9–0

Around this athlete

Athlete Rank Rating
Houceyn Ben Amor #1102 1,251
Bosse De Jonge #1103 1,251
Sari Allam #1104 1,251

Recent tournaments

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 1,251

Rating-period composition

Rating matches
6 0
Record
3–3 Previous month 3–3
Opponents
6 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 1,251

Rating-period composition

Rating matches
6 0
Record
3–3 Previous month 3–3
Opponents
6 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 0 Rating 1,251

Rating-period composition

Rating matches
6 0
Record
3–3 Previous month 3–3
Opponents
6 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 4 new matches Change +141 Rating 1,251

Rating-period composition

Rating matches
6 +4
Record
3–3 Previous month 0–2
Opponents
6 +4
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
May 9, 2026 Younes Lashkari
Lion Cub Jiu Jitsu Competition 6 Boys GI / 8 & 9 years old (DAY 2: Sunday) / White belt / -30 & -34 kg
Method Submission 01:04 13–0
Marginal influence +20
Loss
May 9, 2026 Kyano Panday
Lion Cub Jiu Jitsu Competition 6 Boys GI / 8 & 9 years old (DAY 2: Sunday) / White belt / -30 & -34 kg
Method Points 01:35 0–14
Marginal influence -19
Win
May 9, 2026 Jayvo Hermans
Lion Cub Jiu Jitsu Competition 6 Boys GI / 8 & 9 years old (DAY 2: Sunday) / White belt / -30 & -34 kg
Method Points 03:00 9–0
Marginal influence +25
Win
May 9, 2026 Adrian Maier
Lion Cub Jiu Jitsu Competition 6 Boys GI / 8 & 9 years old (DAY 2: Sunday) / White belt / -30 & -34 kg
Method Decision 03:00 0–0
Marginal influence +39
April 2026 No new matches · 3 left period Change -102 Rating 1,110

Rating-period composition

Rating matches
2 -3
Record
0–2 Previous month 2–3
Opponents
2 -3
Events
1 -1

3 older matches left the 12-month period: 2 won and 1 lost. The rating is then recalculated across the full network, so the monthly change is not a sum of separate deductions.

March 2026 No new matches Change +1 Rating 1,212

Rating-period composition

Rating matches
5 0
Record
2–3 Previous month 2–3
Opponents
5 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.

February 2026 No new matches Change 0 Rating 1,211

Rating-period composition

Rating matches
5 0
Record
2–3 Previous month 2–3
Opponents
5 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 -1 Rating 1,211

Rating-period composition

Rating matches
5 0
Record
2–3 Previous month 2–3
Opponents
5 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 +1 Rating 1,212

Rating-period composition

Rating matches
5 0
Record
2–3 Previous month 2–3
Opponents
5 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 2 new matches Change -44 Rating 1,211

Rating-period composition

Rating matches
5 +2
Record
2–3 Previous month 2–1
Opponents
5 +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
November 9, 2025 Damin Ahamed
GrappleCity: Rotterdam Winter Open Kids Gi / Grey / Kids 6-7 years / -30kg
Method Points 03:00 0–13
Marginal influence -15
Loss
November 9, 2025 Jayden Durivou
GrappleCity: Rotterdam Winter Open Kids Gi / Grey / Kids 6-7 years / -30kg
Method Decision 03:00 2–2
Marginal influence -50
October 2025 No new matches Change +16 Rating 1,255

Rating-period composition

Rating matches
3 0
Record
2–1 Previous month 2–1
Opponents
3 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.

September 2025 No new matches Change 0 Rating 1,239

Rating-period composition

Rating matches
3 0
Record
2–1 Previous month 2–1
Opponents
3 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.

Relevant matches
4.5
Official ranking percentile
Top 74%
Performance
-

4.5 weighted matches against 6 different opponents across 2 events

Weighted win rate
-
Expected win rate
-
Average opponent rating
1,268
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 1 event vote Selected outcome

Registrations and outcomes

Lion Cub Jiu Jitsu Competition 6
U10 · Counts
Boys GI / 8 & 9 years old (DAY 2: Sunday) / White belt / -30 & -34 kg
  • Competition age 8
  • Registered age: u10
  • Source category: u10
GrappleCity: Rotterdam Winter Open
Does not count
Kids Gi / Grey / Kids 6-7 years / -30kg
  • Competition age 7
  • Registered age: u8
  • Source category: u8

Classification evidence

Why ≤ 30 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

  • ≤ 30 kg 1 competition event Selected outcome
  • ≤ 34 kg 1 competition event

Registrations and outcomes

Lion Cub Jiu Jitsu Competition 6
≤ 34 kg · Counts as a competition event
Boys GI / 8 & 9 years old (DAY 2: Sunday) / White belt / -30 & -34 kg
  • Registered weight class: -34 kg
  • Source competition limit: -34 kg

4 matches in the rating period

GrappleCity: Rotterdam Winter Open
≤ 30 kg · Counts as a competition event
Kids Gi / Grey / Kids 6-7 years / -30kg
  • Registered weight class: -30kg
  • Source competition limit: -30kg

2 matches in the rating period

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
  • grey 2 matches in the rating period

Registrations and outcomes

Lion Cub Jiu Jitsu Competition 6
white · Counts as a match
Boys GI / 8 & 9 years old (DAY 2: Sunday) / White belt / -30 & -34 kg
  • Source belt category: white

4 matches in the rating period

GrappleCity: Rotterdam Winter Open
grey · Counts as a match
Kids Gi / Grey / Kids 6-7 years / -30kg
  • Source belt category: grey

2 matches in the rating period