Jan Rybak

Checkmat Zurich

W–L: 5–2
Gi: 1,283
No-Gi: 1,309
Current form: 5–2
Opponents: 7

Overview Matches (9) Events (4+1 scheduled)

Scheduled

19 Sep 2026

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

Tournament history

Events

Search tournament history

Events
Date	Event	Result	Format	Division
2026-06-14	ADCC Suisse Open Championship 2026 CH · No-Gi · 7–8 yo · ≤28 kg	2–0	No-Gi
2026-03-21	Zurich BJJ SPRING OPEN GI and NO-GI 2026 CH · Gi · grey · ≤30 kg ; No-Gi · grey · ≤30 kg	1–2	GiNo-Gi	Place #5
2025-09-20	Züri Kids Cup 2025 CH · Gi · white · 26–30 kg	2–0	Gi
2025-06-14	Zurich BJJ SUMMER OPEN GI - Children, Adults and Masters 2025 CH · Gi · white · ≤26 kg	1–1	Gi

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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 2026-06-14

U10 · Counts

BOYS / 7-8 years / -28 kg

Competition age 8

Zurich BJJ SPRING OPEN GI and NO-GI 2026 2026-03-21

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 2025-09-20

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 2026-06-14

≤ 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 2026-03-21

≤ 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 2026-03-21

≤ 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 2025-09-20

≤ 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 2026-03-21

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 2026-03-21

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 2025-09-20

white · Counts as a match

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

Source belt category: white

2 matches in the rating period

Scheduled

Züri Kids Cup 2026

Events