TopBJJ Index Youth

TopBJJ Index

Search TopBJJ Index
Language selector
Menu
NL

Sybe Boomsma

Bjj Delft

W–L
3–5
Won and lost rating-eligible matches in the past 12 months.
Gi
1,229
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
3–5
Results from the ten most recent rating-eligible matches.
Opponents
7
Unique opponents faced in rating-eligible matches in the past 12 months.

Indexed career

Matches

8
Indexed competition matches
Date Opponent Result Event Division
2026-05-30 Rayan Lichtveld
Loss
Nijmegen Open BJJ 2026 Gi · Kids / 13 - 15 years boys / White / -42 & -46 kg
2026-05-30 Neo Rosenstand
Loss
Nijmegen Open BJJ 2026 Gi · Kids / 13 - 15 years boys / White / -42 & -46 kg
2026-03-28 Ilajah Swaak
Loss
International Veluwe Open Jiu Jitsu Championship 2026 GI & NO-GI Gi · Kids GI / 10 - 12 years boys / White / -42 & -46 kg
2026-03-28 Nouh El Badey
Win
International Veluwe Open Jiu Jitsu Championship 2026 GI & NO-GI Gi · Kids GI / 10 - 12 years boys / White / -42 & -46 kg
2026-03-28 Zahra Hiba
Win
International Veluwe Open Jiu Jitsu Championship 2026 GI & NO-GI Gi · Kids GI / 10 - 12 years boys / White / -42 & -46 kg
2026-03-28 Loris De Ceulaer
Win
International Veluwe Open Jiu Jitsu Championship 2026 GI & NO-GI Gi · Kids GI / 10 - 12 years boys / White / -42 & -46 kg
2026-03-15 Jenoah Plet
Loss
Cauliflower Cup Circuit Gi · Boys Gi / White / Teen I (13yrs) / -44,50 kg
2026-03-15 Jenoah Plet
Loss
Cauliflower Cup Circuit Gi · Boys Gi / White / Teen I (13yrs) / -44,50 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 1,229

Rating-period composition

Rating matches
8 0
Record
3–5 Previous month 3–5
Opponents
7 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 1,229

Rating-period composition

Rating matches
8 0
Record
3–5 Previous month 3–5
Opponents
7 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 -4 Rating 1,229

Rating-period composition

Rating matches
8 0
Record
3–5 Previous month 3–5
Opponents
7 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 2 new matches Change -35 Rating 1,233

Rating-period composition

Rating matches
8 +2
Record
3–5 Previous month 3–3
Opponents
7 +2
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.
Loss
May 30, 2026 Rayan Lichtveld
Nijmegen Open BJJ 2026 Kids / 13 - 15 years boys / White / -42 & -46 kg
Method Points 04:00 0–2
Marginal influence -30
Loss
May 30, 2026 Neo Rosenstand
Nijmegen Open BJJ 2026 Kids / 13 - 15 years boys / White / -42 & -46 kg
Method Points 04:00 2–4
Marginal influence -24
April 2026 No new matches Change 0 Rating 1,268

Rating-period composition

Rating matches
6 0
Record
3–3 Previous month 3–3
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.

March 2026 6 new matches Change Starting point Rating 1,268

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
March 28, 2026 Ilajah Swaak
International Veluwe Open Jiu Jitsu Championship 2026 GI & NO-GI Kids GI / 10 - 12 years boys / White / -42 & -46 kg
Method Submission 02:24 0–9
Marginal influence -20
Win
March 28, 2026 Nouh El Badey
International Veluwe Open Jiu Jitsu Championship 2026 GI & NO-GI Kids GI / 10 - 12 years boys / White / -42 & -46 kg
Method Submission 02:18 6–0
Marginal influence +20
Win
March 28, 2026 Zahra Hiba
International Veluwe Open Jiu Jitsu Championship 2026 GI & NO-GI Kids GI / 10 - 12 years boys / White / -42 & -46 kg
Method Points 03:00 4–0
Marginal influence +30
Win
March 28, 2026 Loris De Ceulaer
International Veluwe Open Jiu Jitsu Championship 2026 GI & NO-GI Kids GI / 10 - 12 years boys / White / -42 & -46 kg
Method Points 03:00 2–2
Marginal influence +35
Loss
March 15, 2026 Jenoah Plet
Cauliflower Cup Circuit Boys Gi / White / Teen I (13yrs) / -44,50 kg
Method Submission 02:10 0–2
Marginal influence -16
Loss
March 15, 2026 Jenoah Plet
Cauliflower Cup Circuit Boys Gi / White / Teen I (13yrs) / -44,50 kg
Method Submission 01:33 0–0
Marginal influence -16
Relevant matches
5.7
Official ranking percentile
Top 81%
Performance
9.0 pp below expectation

5.7 weighted matches against 7 different opponents across 3 events

Weighted win rate
37.2%
Expected win rate
46.2%
Average opponent rating
1,278
Repeated-opponent share
12.5%
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 3 event votes Selected outcome

Registrations and outcomes

Nijmegen Open BJJ 2026
U14 · Counts
Kids / 13 - 15 years boys / White / -42 & -46 kg
  • Competition age 13
  • Registered age: u16
  • Source category: u16
International Veluwe Open Jiu Jitsu Championship 2026 GI & NO-GI
U14 · Counts
Kids GI / 10 - 12 years boys / White / -42 & -46 kg
  • Competition age 13
  • Registered age: u12
  • Source category: u12
Cauliflower Cup Circuit
U14 · Counts
Boys Gi / White / Teen I (13yrs) / -44,50 kg
  • Competition age 13
  • Registered age: u14
  • Source category: u14

Classification evidence

Why ≤ 45 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

  • ≤ 45 kg 1 competition event Selected outcome
  • ≤ 46 kg 2 competition events

Registrations and outcomes

Nijmegen Open BJJ 2026
≤ 46 kg · Counts as a competition event
Kids / 13 - 15 years boys / White / -42 & -46 kg
  • Registered weight class: -46 kg
  • Source competition limit: -46 kg

2 matches in the rating period

International Veluwe Open Jiu Jitsu Championship 2026 GI & NO-GI
≤ 46 kg · Counts as a competition event
Kids GI / 10 - 12 years boys / White / -42 & -46 kg
  • Registered weight class: -46 kg
  • Source competition limit: -46 kg

4 matches in the rating period

Cauliflower Cup Circuit
≤ 45 kg · Counts as a competition event
Boys Gi / White / Teen I (13yrs) / -44,50 kg
  • Registered weight class: -44,50 kg
  • Source competition limit: -44,50 kg

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 8 matches in the rating period Selected outcome

Registrations and outcomes

Nijmegen Open BJJ 2026
white · Counts as a match
Kids / 13 - 15 years boys / White / -42 & -46 kg
  • Source belt category: white

2 matches in the rating period

International Veluwe Open Jiu Jitsu Championship 2026 GI & NO-GI
white · Counts as a match
Kids GI / 10 - 12 years boys / White / -42 & -46 kg
  • Source belt category: white

4 matches in the rating period

Cauliflower Cup Circuit
white · Counts as a match
Boys Gi / White / Teen I (13yrs) / -44,50 kg
  • Source belt category: white

2 matches in the rating period