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Maurick Willemstein

Checkmat Zurich

W–L
2–3
Won and lost rating-eligible matches in the past 12 months.
Gi
1,214
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
2–3
Results from the ten most recent rating-eligible matches.
Opponents
5
Unique opponents faced in rating-eligible matches in the past 12 months.

Indexed career

Matches

5
Indexed competition matches
Date Opponent Result Event Division
2026-03-21 Oliver Kogan
Loss
Zurich BJJ SPRING OPEN GI and NO-GI 2026 Gi · BOYS GI / Kids 2 / Grey / -23kg
2026-03-21 Alessio Darugna
Loss
Zurich BJJ SPRING OPEN GI and NO-GI 2026 Gi · BOYS GI / Kids 2 / Grey / -23kg
2026-03-21 Liam Amano
Win
Zurich BJJ SPRING OPEN GI and NO-GI 2026 Gi · BOYS GI / Kids 2 / Grey / -23kg
2025-09-20 Matias Gomes
Win
Züri Kids Cup 2025 Gi · Boys GI / White / Kids 2 (2019-2018) / 20kg-23kg
2025-09-20 Elias David
Loss
Züri Kids Cup 2025 Gi · Boys GI / White / Kids 2 (2019-2018) / 20kg-23kg

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 1,214

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.

July 2026 No new matches Change 0 Rating 1,214

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.

June 2026 No new matches Change -3 Rating 1,214

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.

May 2026 No new matches Change 0 Rating 1,217

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.

April 2026 No new matches Change +1 Rating 1,217

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.

March 2026 3 new matches Change +19 Rating 1,216

Rating-period composition

Rating matches
5 +3
Record
2–3 Previous month 1–1
Opponents
5 +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.
Loss
March 21, 2026 Oliver Kogan
Zurich BJJ SPRING OPEN GI and NO-GI 2026 BOYS GI / Kids 2 / Grey / -23kg
Method Points 02:00 2–3
Marginal influence -28
Loss
March 21, 2026 Alessio Darugna
Zurich BJJ SPRING OPEN GI and NO-GI 2026 BOYS GI / Kids 2 / Grey / -23kg
Method Submission 01:26 4–0
Marginal influence -27
Win
March 21, 2026 Liam Amano
Zurich BJJ SPRING OPEN GI and NO-GI 2026 BOYS GI / Kids 2 / Grey / -23kg
Method Points 02:00 5–1
Marginal influence +35
February 2026 No new matches Change 0 Rating 1,197

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.

January 2026 No new matches Change 0 Rating 1,197

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.

December 2025 No new matches Change 0 Rating 1,197

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.

November 2025 No new matches Change 0 Rating 1,197

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.

October 2025 No new matches Change 0 Rating 1,197

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.

September 2025 2 new matches Change Starting point Rating 1,197

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
September 20, 2025 Matias Gomes
Züri Kids Cup 2025 Boys GI / White / Kids 2 (2019-2018) / 20kg-23kg
Method Submission 00:36 0–0
Marginal influence +35
Loss
September 20, 2025 Elias David
Züri Kids Cup 2025 Boys GI / White / Kids 2 (2019-2018) / 20kg-23kg
Method Submission 01:45 0–0
Marginal influence -36
Relevant matches
4
Official ranking percentile
Top 85%
Performance
-

4 weighted matches against 5 different opponents across 2 events

Weighted win rate
-
Expected win rate
-
Average opponent rating
1,242
Repeated-opponent share
0.0%
Network connectivity
80.9%

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

Zurich BJJ SPRING OPEN GI and NO-GI 2026
U10 · Counts
BOYS GI / Kids 2 / Grey / -23kg
  • Competition age 8
  • Registered age: u10
  • Source category: u10
Züri Kids Cup 2025
Does not count
Boys GI / White / Kids 2 (2019-2018) / 20kg-23kg
  • Competition age 7
  • Registered age: u8
  • Source category: u8

Classification evidence

Why ≤ 23 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

  • ≤ 23 kg 2 competition events Selected outcome

Registrations and outcomes

Zurich BJJ SPRING OPEN GI and NO-GI 2026
≤ 23 kg · Counts as a competition event
BOYS GI / Kids 2 / Grey / -23kg
  • Registered weight class: -23kg
  • Source competition limit: -23kg

3 matches in the rating period

Züri Kids Cup 2025
≤ 23 kg · Counts as a competition event
Boys GI / White / Kids 2 (2019-2018) / 20kg-23kg
  • Registered weight class: 20kg-23kg
  • Source competition limit: 20kg-23kg

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

Registrations and outcomes

Zurich BJJ SPRING OPEN GI and NO-GI 2026
grey · Counts as a match
BOYS GI / Kids 2 / Grey / -23kg
  • Source belt category: grey

3 matches in the rating period

Züri Kids Cup 2025
white · Counts as a match
Boys GI / White / Kids 2 (2019-2018) / 20kg-23kg
  • Source belt category: white

2 matches in the rating period