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Jan Rybak

Checkmat Zurich

W–L
5–2
Won and lost rating-eligible matches in the past 12 months.
Gi
1,283
Rating based on Gi matches in the past 12 months.
No-Gi
1,309
Rating based on No-Gi matches in the past 12 months.
Current form
5–2
Results from the ten most recent rating-eligible matches.
Opponents
7
Unique opponents faced in rating-eligible matches in the past 12 months.

Honours

Medals and placements

Gold
2
Silver
2
Bronze
0
Total medals
4
Events with results
4

Full career record

Wins
6
Losses
3
Matches
9
Win rate
66.7%

Ways of winning

Submission
1
Points
5
Decision
0
Disqualification
0

Personal records

Longest winning streak
2
Longest submission streak
1
Longest gold streak
1
Largest recorded points win
9–0

Recent recorded placements

  3. Züri Kids Cup 2025

    CH Event record 2–0

    • Boys GI / White / Kids 2 (2019-2018) / 26kg-30kg

12-month performance profile

How the results were achieved

Past 12 months
Current win streak
2
Unique opponents
7
Distinct events
3

Ways of winning

  • Submission 1 20%
  • Points 4 80%
  • Decision 0 0%
  • Other recorded result 0 0%

Gi versus No-Gi

Gi

Rating
1283
Record
2–1
Win rate
67%
Submission share
0%

No-Gi

Rating
1309
Record
3–1
Win rate
75%
Submission share
33%

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
1,375
Change over 90 days
+38
Highest rating in 12 months
1,374
Performance versus expectation
+22.6 pp
Schedule strength
Top 72%
Average opponent rating
1,285
Weighted win rate
72%
Expected win rate
50%
Repeat-opponent share
0%
Effective evidence
6
Confidence
81/100

Opponents

Opposition and rivalries

The strongest recorded win, rematches and opponents faced repeatedly.

Top 10 highest-ranked defeated opponents

Past 12 months

  1. #1661 Athanasios Savvidis · ADCC Suisse Open Championship 2026 Sub 03:29 0–1
  2. #2048 Sani Nebojša Bonfa · Züri Kids Cup 2025 Pts 9–0
  3. #2140 Luka Lakic · ADCC Suisse Open Championship 2026 Pts 4–2

Full career

  1. #1661 Athanasios Savvidis · ADCC Suisse Open Championship 2026 Sub 03:29 0–1
  2. #2048 Sani Nebojša Bonfa · Züri Kids Cup 2025 Pts 9–0
  3. #2140 Luka Lakic · ADCC Suisse Open Championship 2026 Pts 4–2

Around this athlete

Athlete Rank Rating
Jan Rybak #1043 1,375
Vojtěch Šebek #1044 1,375

Scheduled

  1. Züri Kids Cup 2026

    CH

    Boys GI / Grey / Kids 3 (2017-2018) / 27kg-30kg Boys NO-GI / Grey / Kids 3 (2017-2018) / 27kg-30kg
    Confirmed

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 1,375

Rating-period composition

Rating matches
7 0
Record
5–2 Previous month 5–2
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 +1 Rating 1,375

Rating-period composition

Rating matches
7 0
Record
5–2 Previous month 5–2
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 2 new matches · 2 left period Change +31 Rating 1,374

Rating-period composition

Rating matches
7 0
Record
5–2 Previous month 4–3
Opponents
7 0
Events
3 0

2 older matches left the 12-month period: 1 won and 1 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.
Win
June 14, 2026 Athanasios Savvidis
ADCC Suisse Open Championship 2026 BOYS / 7-8 years / -28 kg
Method Submission 03:29 0–1
Marginal influence +19
Win
June 14, 2026 Luka Lakic
ADCC Suisse Open Championship 2026 BOYS / 7-8 years / -28 kg
Method Points 04:00 4–2
Marginal influence +15
May 2026 No new matches Change -4 Rating 1,343

Rating-period composition

Rating matches
7 0
Record
4–3 Previous month 4–3
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.

April 2026 No new matches Change 0 Rating 1,347

Rating-period composition

Rating matches
7 0
Record
4–3 Previous month 4–3
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.

March 2026 3 new matches Change +9 Rating 1,347

Rating-period composition

Rating matches
7 +3
Record
4–3 Previous month 3–1
Opponents
7 +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.
Loss
March 21, 2026 Aylan Saâdi
Zurich BJJ SPRING OPEN GI and NO-GI 2026 BOYS NOGI / Kids 2 / Grey / -30kg
Method Points 02:00 2–3
Marginal influence -22
Win
March 21, 2026 Jonas Boll
Zurich BJJ SPRING OPEN GI and NO-GI 2026 BOYS NOGI / Kids 2 / Grey / -30kg
Method Points 1–0
Marginal influence +15
Loss
March 21, 2026 John Linder
Zurich BJJ SPRING OPEN GI and NO-GI 2026 BOYS GI / Kids 2 / Grey / -30kg
Method Points 02:11 0–1
Marginal influence -18
February 2026 No new matches Change 0 Rating 1,338

Rating-period composition

Rating matches
4 0
Record
3–1 Previous month 3–1
Opponents
4 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 0 Rating 1,338

Rating-period composition

Rating matches
4 0
Record
3–1 Previous month 3–1
Opponents
4 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 +2 Rating 1,338

Rating-period composition

Rating matches
4 0
Record
3–1 Previous month 3–1
Opponents
4 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 No new matches Change 0 Rating 1,336

Rating-period composition

Rating matches
4 0
Record
3–1 Previous month 3–1
Opponents
4 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.

October 2025 No new matches Change 0 Rating 1,336

Rating-period composition

Rating matches
4 0
Record
3–1 Previous month 3–1
Opponents
4 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.

September 2025 2 new matches Change +117 Rating 1,336

Rating-period composition

Rating matches
4 +2
Record
3–1 Previous month 1–1
Opponents
4 +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.
Win
September 20, 2025 Sani Nebojša Bonfa
Züri Kids Cup 2025 Boys GI / White / Kids 2 (2019-2018) / 26kg-30kg
Method Points 02:00 9–0
Marginal influence +15
Win
September 20, 2025 Tudor Vulpe
Züri Kids Cup 2025 Boys GI / White / Kids 2 (2019-2018) / 26kg-30kg
Method Points 02:00 1–0
Marginal influence +12
Relevant matches
6
Official ranking percentile
Top 35%
Performance
22.6 pp above expectation

6 weighted matches against 7 different opponents across 3 events

Weighted win rate
72.4%
Expected win rate
49.9%
Average opponent rating
1,285
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 2 event votes Selected outcome

Registrations and outcomes

ADCC Suisse Open Championship 2026
U10 · Counts
BOYS / 7-8 years / -28 kg
  • Competition age 8
Zurich BJJ SPRING OPEN GI and NO-GI 2026
U10 · Counts
BOYS GI / Kids 2 / Grey / -30kg
  • Competition age 8
  • Registered age: u10
  • Source category: u10
BOYS NOGI / Kids 2 / Grey / -30kg
  • Competition age 8
  • Registered age: u10
  • Source category: u10
Züri Kids Cup 2025
Does not count
Boys GI / White / Kids 2 (2019-2018) / 26kg-30kg
  • Competition age 7
  • Registered age: u8
  • Source category: u8

Classification evidence

Why ≤ 28 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

  • ≤ 28 kg 1 competition event Selected outcome
  • ≤ 30 kg 2 competition events

Registrations and outcomes

ADCC Suisse Open Championship 2026
≤ 28 kg · Counts as a competition event
BOYS / 7-8 years / -28 kg
  • Registered weight class: -28 kg
  • Source competition limit: -28 kg

2 matches in the rating period

Zurich BJJ SPRING OPEN GI and NO-GI 2026
≤ 30 kg · Counts as a competition event
BOYS GI / Kids 2 / Grey / -30kg
  • Registered weight class: -30kg
  • Source competition limit: -30kg

1 match in the rating period

Zurich BJJ SPRING OPEN GI and NO-GI 2026
≤ 30 kg · Counts as a competition event
BOYS NOGI / Kids 2 / Grey / -30kg
  • Registered weight class: -30kg
  • Source competition limit: -30kg

2 matches in the rating period

Züri Kids Cup 2025
≤ 30 kg · Counts as a competition event
Boys GI / White / Kids 2 (2019-2018) / 26kg-30kg
  • Registered weight class: 26kg-30kg
  • Source competition limit: 26kg-30kg

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 NOGI / Kids 2 / Grey / -30kg
  • Source belt category: grey

2 matches in the rating period

Zurich BJJ SPRING OPEN GI and NO-GI 2026
grey · Counts as a match
BOYS GI / Kids 2 / Grey / -30kg
  • Source belt category: grey

1 match in the rating period

Züri Kids Cup 2025
white · Counts as a match
Boys GI / White / Kids 2 (2019-2018) / 26kg-30kg
  • Source belt category: white

2 matches in the rating period