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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.

Indexed career

Matches

9
Indexed competition matches
Date Opponent Result Event Division
2026-06-14 Athanasios Savvidis
Win
ADCC Suisse Open Championship 2026 No-Gi · BOYS / 7-8 years / -28 kg
2026-06-14 Luka Lakic
Win
ADCC Suisse Open Championship 2026 No-Gi · BOYS / 7-8 years / -28 kg
2026-03-21 Aylan Saâdi
Loss
Zurich BJJ SPRING OPEN GI and NO-GI 2026 No-Gi · BOYS NOGI / Kids 2 / Grey / -30kg
2026-03-21 Jonas Boll
Win
Zurich BJJ SPRING OPEN GI and NO-GI 2026 No-Gi · BOYS NOGI / Kids 2 / Grey / -30kg
2026-03-21 John Linder
Loss
Zurich BJJ SPRING OPEN GI and NO-GI 2026 Gi · BOYS GI / Kids 2 / Grey / -30kg
2025-09-20 Sani Nebojša Bonfa
Win
Züri Kids Cup 2025 Gi · Boys GI / White / Kids 2 (2019-2018) / 26kg-30kg
2025-09-20 Tudor Vulpe
Win
Züri Kids Cup 2025 Gi · Boys GI / White / Kids 2 (2019-2018) / 26kg-30kg
2025-06-14 Alan Peiker
Loss
Zurich BJJ SUMMER OPEN GI - Children, Adults and Masters 2025 Gi · BOYS GI / Kids 2 / White / -26kg
2025-06-14 Ektoras Wieser-Christoforidis
Win
Zurich BJJ SUMMER OPEN GI - Children, Adults and Masters 2025 Gi · BOYS GI / Kids 2 / White / -26kg

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