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Jan Jaszczuk

BERSERKERS TEAM

W–L
1–2
Won and lost rating-eligible matches in the past 12 months.
Gi
1,196
Rating based on Gi matches in the past 12 months.
No-Gi
1,134
Rating based on No-Gi matches in the past 12 months.
Current form
1–2
Results from the ten most recent rating-eligible matches.
Opponents
3
Unique opponents faced in rating-eligible matches in the past 12 months.

Honours

Medals and placements

Gold
0
Silver
4
Bronze
0
Total medals
4
Events with results
4

Full career record

Wins
5
Losses
7
Matches
12
Win rate
41.7%

Ways of winning

Submission
2
Points
2
Decision
0
Disqualification
0

Personal records

Longest winning streak
2
Longest submission streak
2

Recent recorded placements

12-month performance profile

How the results were achieved

Past 12 months
Current win streak
0
Unique opponents
3
Distinct events
1

Ways of winning

  • Submission 0 0%
  • Points 1 100%
  • Decision 0 0%
  • Other recorded result 0 0%

Gi versus No-Gi

Gi

Rating
1196
Record
1–1
Win rate
50%
Submission share
0%

No-Gi

Rating
1134
Record
0–1
Win rate
0%
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
1,256
Change over 90 days
+145
Highest rating in 12 months
1,256
Performance versus expectation
-
Schedule strength
-
Average opponent rating
1,381
Weighted win rate
-
Expected win rate
-
Repeat-opponent share
0%
Effective evidence
2.7
Confidence
52/100

Opponents

Opposition and rivalries

The strongest recorded win, rematches and opponents faced repeatedly.

Rematches 2–4 2–4 across 6 rematches against 3 repeat opponents.
Most-faced opponent Jonas Vogt 2–0 · 2 matches

Top 10 highest-ranked defeated opponents

Past 12 months

  1. #1448 Jonas Vogt · Fennec BJJ Kids Cup Vol. 9 Gi & NoGi Pts 13–0

Full career

  1. #1448 Jonas Vogt · Fennec BJJ Kids Cup Vol. 9 Gi & NoGi Pts 13–0

Rivals

Opponent Head-to-head record Matches
Jonas Vogt 2–0 2
Jonte Lehmann 0–2 2
Nuaym Nguyen 0–2 2

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 1,256

Rating-period composition

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

July 2026 No new matches Change 0 Rating 1,256

Rating-period composition

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

June 2026 No new matches Change 0 Rating 1,256

Rating-period composition

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

May 2026 No new matches Change 0 Rating 1,256

Rating-period composition

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

April 2026 3 new matches · 2 left period Change +145 Rating 1,256

Rating-period composition

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

2 older matches left the 12-month period: 0 won and 2 lost. The rating is then recalculated across the full network, so the monthly change is not a sum of separate deductions.

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
April 11, 2026 Tim Libuda
Fennec BJJ Kids Cup Vol. 9 Gi & NoGi Boys No-Gi (under 16 y.o.) / Grey / 10-11 years / -34 kg
Method Submission 01:37 2–0
Marginal influence -17
Loss
April 11, 2026 Nuaym Nguyen
Fennec BJJ Kids Cup Vol. 9 Gi & NoGi Boys Gi (under 16 y.o.) / Grey / 10-11 years / -30 kg
Method Submission 00:11 0–2
Marginal influence -4
Win
April 11, 2026 Jonas Vogt
Fennec BJJ Kids Cup Vol. 9 Gi & NoGi Boys Gi (under 16 y.o.) / Grey / 10-11 years / -30 kg
Method Points 03:00 13–0
Marginal influence +23
Relevant matches
2.7
Official ranking percentile
-
Performance
-

2.7 weighted matches against 3 different opponents across 1 events

Weighted win rate
-
Expected win rate
-
Average opponent rating
1,381
Repeated-opponent share
0.0%
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 1 event vote Selected outcome

Registrations and outcomes

Fennec BJJ Kids Cup Vol. 9 Gi & NoGi
U14 · Counts
Boys No-Gi (under 16 y.o.) / Grey / 10-11 years / -34 kg
  • Competition age 12
  • Registered age: u12
  • Source category: u12
Boys Gi (under 16 y.o.) / Grey / 10-11 years / -30 kg
  • Competition age 12
  • Registered age: u12
  • Source category: u12

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

Registrations and outcomes

Fennec BJJ Kids Cup Vol. 9 Gi & NoGi
grey · Counts as a match
Boys No-Gi (under 16 y.o.) / Grey / 10-11 years / -34 kg
  • Source belt category: grey

1 match in the rating period

Fennec BJJ Kids Cup Vol. 9 Gi & NoGi
grey · Counts as a match
Boys Gi (under 16 y.o.) / Grey / 10-11 years / -30 kg
  • Source belt category: grey

2 matches in the rating period