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SK

Štefan Jakubec

SAI CLUB Martin - Slovakia

W–L
9–1
Won and lost rating-eligible matches in the past 12 months.
Gi
1,355
Rating based on Gi matches in the past 12 months.
No-Gi
1,431
Rating based on No-Gi matches in the past 12 months.
Current form
9–1
Results from the ten most recent rating-eligible matches.
Opponents
9
Unique opponents faced in rating-eligible matches in the past 12 months.

Tournament history

Events

11
Events
Date Event Result Format Division
N-GEN Kids BJJ Tournament #4 CZ · Gi · 10–11 yo · white/grey · ≤33 kg ; No-Gi · 10–11 yo · ≤36 kg 7–0 W–L: Win / Loss GiNo-Gi
  • Boys No-Gi / All belt / Junior (10-11yrs) / -36 kg (2015,2016)
  • Boys Gi / White grey / Junior (10-11yrs) / -33 kg (2015,2016)
TATAMY 16 KIDS (No-GI and GI round robin) CZ · No-Gi · 10–12 yo · ≤32 kg 2–1 W–L: Win / Loss No-Gi
  • Kids / No Gi / 10-12 years / Boys / Intermediate / -32 kg
ADCC Amateur World Championship 2025 PL · No-Gi · 9–10 yo · ≤32 kg 0–1 W–L: Win / Loss No-Gi
  • Place #9
XIV. REBEL BJJ CUP CZ · Gi · 10–11 yo · yellow/orange/green · ≤33 kg ; No-Gi · 10–11 yo · ≤33 kg 6–1 W–L: Win / Loss GiNo-Gi
  • Boys Gi / Yellow orange green / Junior (10-11yrs) / -33 kg (2014,2015)
  • Boys No-Gi / All belt / Junior (10-11yrs) / -33 kg (2014,2015)
TATAMY 12 (No-GI and GI round robin) CZ · Gi · 7–9 yo · ≤32 kg ; No-Gi · 7–9 yo · ≤32 kg 11–1 W–L: Win / Loss GiNo-Gi
  • Kids / Gi / 7-9 years / Mix / All levels / -32 kg
  • Kids / No Gi / 7-9 years / Mix / All levels / -32 kg
XI. GrappleXmas BJJ Cup KIDS CZ · Gi · 7–9 yo · white/grey · ≤29 kg ; No-Gi · 7–9 yo · ≤29 kg 9–0 W–L: Win / Loss GiNo-Gi
  • Boys Gi / White grey / Pee Wee (7-9 yrs) / -29 kg (2014,2015,2016)
  • Boys No-Gi / All belt / Pee Wee (7-9 yrs) / -29 kg (2014,2015,2016)
TATAMY 6 (NO-GI and GI round robin) CZ · Gi · 7–9 yo · ≤28 kg ; No-Gi · 7–9 yo · ≤28 kg 9–1 W–L: Win / Loss GiNo-Gi
  • Kids / Gi / 7-9 years / Mix / All levels / -28 kg
  • Kids / No Gi / 7-9 years / Mix / All levels / -28 kg
XII. REBEL BJJ CUP KIDS CZ · Gi · 9 yo · yellow/orange/green · ≤30 kg ; No-Gi · 9 yo · ≤27 kg 3–2 W–L: Win / Loss GiNo-Gi
  • Boys No-Gi / All belt / Pee Wee III (9yrs) / -27 kg
  • Boys Gi / Yellow orange green / Pee Wee III (9yrs) / -30 kg
Czech Open Gi CZ · Gi · 7–8 yo · ≤28 kg 3–1 W–L: Win / Loss Gi
  • Place #4
ADCC Czech Open 2023 CZ · No-Gi · 7–8 yo · ≤28 kg 3–1 W–L: Win / Loss No-Gi
  • Kids Mix 7-8 years / Beginner / -28kg
TATAMY 4 (NO-GI and GI) CZ · Gi · 7–9 yo · yellow/orange/green · ≤28 kg ; No-Gi · 7–9 yo · ≤28 kg 4–0 W–L: Win / Loss GiNo-Gi
  • Kids / No Gi / Boys / Intermediate / 7-9 years / -28 kg
  • Kids / Gi / Boys / Yellow/orange/green belt / 7-9 years / -28 kg

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 +2 Rating 1,474

Rating-period composition

Rating matches
10 0
Record
9–1 Previous month 9–1
Opponents
9 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 1,472

Rating-period composition

Rating matches
10 0
Record
9–1 Previous month 9–1
Opponents
9 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 +2 Rating 1,472

Rating-period composition

Rating matches
10 0
Record
9–1 Previous month 9–1
Opponents
9 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 · 1 left period Change +8 Rating 1,470

Rating-period composition

Rating matches
10 -1
Record
9–1 Previous month 9–2
Opponents
9 -1
Events
2 -1

1 older matches left the 12-month period: 0 won and 1 lost. The rating is then recalculated across the full network, so the monthly change is not a sum of separate deductions.

April 2026 No new matches Change +2 Rating 1,462

Rating-period composition

Rating matches
11 0
Record
9–2 Previous month 9–2
Opponents
10 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 7 new matches · 7 left period Change +33 Rating 1,460

Rating-period composition

Rating matches
11 0
Record
9–2 Previous month 8–3
Opponents
10 +1
Events
3 0

7 older matches left the 12-month period: 6 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
March 22, 2026 Alexander Polák
N-GEN Kids BJJ Tournament #4 Boys No-Gi / All belt / Junior (10-11yrs) / -36 kg (2015,2016)
Method Submission 00:21 4–0
Marginal influence +18
Win
March 22, 2026 Lukáš Oravecz
N-GEN Kids BJJ Tournament #4 Boys No-Gi / All belt / Junior (10-11yrs) / -36 kg (2015,2016)
Method Submission 01:07 2–0
Marginal influence +16
Win
March 22, 2026 Jakub Dominik
N-GEN Kids BJJ Tournament #4 Boys No-Gi / All belt / Junior (10-11yrs) / -36 kg (2015,2016)
Method Submission 00:10 0–0
Marginal influence +12
Win
March 22, 2026 Oliver Balej
N-GEN Kids BJJ Tournament #4 Boys No-Gi / All belt / Junior (10-11yrs) / -36 kg (2015,2016)
Method Submission 00:12 4–0
Marginal influence +17
Win
March 22, 2026 Rodan Gábriš
N-GEN Kids BJJ Tournament #4 Boys Gi / White grey / Junior (10-11yrs) / -33 kg (2015,2016)
Method Submission 00:53 9–0
Marginal influence +9
Win
March 22, 2026 Jiri Antos
N-GEN Kids BJJ Tournament #4 Boys Gi / White grey / Junior (10-11yrs) / -33 kg (2015,2016)
Method Submission 00:46 5–0
Marginal influence +2
Win
March 22, 2026 Alexander Polák
N-GEN Kids BJJ Tournament #4 Boys Gi / White grey / Junior (10-11yrs) / -33 kg (2015,2016)
Method Submission 01:20 12–0
Marginal influence +7
February 2026 No new matches Change +3 Rating 1,427

Rating-period composition

Rating matches
11 0
Record
8–3 Previous month 8–3
Opponents
9 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.

January 2026 No new matches Change -1 Rating 1,424

Rating-period composition

Rating matches
11 0
Record
8–3 Previous month 8–3
Opponents
9 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.

December 2025 No new matches · 10 left period Change -94 Rating 1,425

Rating-period composition

Rating matches
11 -10
Record
8–3 Previous month 17–4
Opponents
9 -8
Events
3 -1

10 older matches left the 12-month period: 9 won and 1 lost. The rating is then recalculated across the full network, so the monthly change is not a sum of separate deductions.

November 2025 No new matches Change -3 Rating 1,519

Rating-period composition

Rating matches
21 0
Record
17–4 Previous month 17–4
Opponents
17 0
Events
4 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 -3 Rating 1,522

Rating-period composition

Rating matches
21 0
Record
17–4 Previous month 17–4
Opponents
17 0
Events
4 0

No matches were added or left the period. The change comes from the monthly revaluation of opponents across the full network.

September 2025 3 new matches Change +19 Rating 1,525

Rating-period composition

Rating matches
21 +3
Record
17–4 Previous month 15–3
Opponents
17 +3
Events
4 +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 Maxmilián Beneš
TATAMY 16 KIDS (No-GI and GI round robin) Kids / No Gi / 10-12 years / Boys / Intermediate / -32 kg
Method Submission 00:45 0–0
Marginal influence +9
Loss
September 20, 2025 Alexander Ciornii
TATAMY 16 KIDS (No-GI and GI round robin) Kids / No Gi / 10-12 years / Boys / Intermediate / -32 kg
Method Submission 03:01 0–0
Marginal influence -14
Win
September 20, 2025 Michal Mitlehner
TATAMY 16 KIDS (No-GI and GI round robin) Kids / No Gi / 10-12 years / Boys / Intermediate / -32 kg
Method Submission 01:35 0–0
Marginal influence +12
Relevant matches
7.4
Official ranking percentile
Top 11%
Performance
-

7.4 weighted matches against 9 different opponents across 2 events

Weighted win rate
-
Expected win rate
-
Average opponent rating
1,395
Repeated-opponent share
10.0%
Network connectivity
80.9%

Classification evidence

Why U12?

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

  • U12 1 event vote Selected outcome

Registrations and outcomes

N-GEN Kids BJJ Tournament #4
U12 · Counts
Boys Gi / White grey / Junior (10-11yrs) / -33 kg (2015,2016)
  • Competition age 11
  • Registered age: u12
  • Source category: u12
Boys No-Gi / All belt / Junior (10-11yrs) / -36 kg (2015,2016)
  • Competition age 11
  • Registered age: u12
  • Source category: u12
TATAMY 16 KIDS (No-GI and GI round robin)
Does not count
Kids / Gi / 10-12 years / Boys / Yellow/orange/green belt / -32 kg
  • Competition age 10
Kids / No Gi / 10-12 years / Boys / Intermediate / -32 kg
  • Competition age 10

Classification evidence

Why ≤ 32 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

  • ≤ 32 kg 1 competition event Selected outcome

Registrations and outcomes

N-GEN Kids BJJ Tournament #4
≤ 33 kg · Does not count
Boys Gi / White grey / Junior (10-11yrs) / -33 kg (2015,2016)
  • Registered weight class: -33 kg (2015,2016)
  • Source competition limit: -33 kg (2015,2016)

3 matches in the rating period · conflicting upper weight limits make this event ambiguous

N-GEN Kids BJJ Tournament #4
≤ 36 kg · Does not count
Boys No-Gi / All belt / Junior (10-11yrs) / -36 kg (2015,2016)
  • Registered weight class: -36 kg (2015,2016)
  • Source competition limit: -36 kg (2015,2016)

4 matches in the rating period · conflicting upper weight limits make this event ambiguous

TATAMY 16 KIDS (No-GI and GI round robin)
Does not count
Kids / Gi / 10-12 years / Boys / Yellow/orange/green belt / -32 kg
  • Registered weight class: -32 kg
  • Source competition limit: -32 kg

No matches in the rating period · no valid weight evidence

TATAMY 16 KIDS (No-GI and GI round robin)
≤ 32 kg · Counts as a competition event
Kids / No Gi / 10-12 years / Boys / Intermediate / -32 kg
  • Registered weight class: -32 kg
  • Source competition limit: -32 kg

3 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

Registrations and outcomes

N-GEN Kids BJJ Tournament #4
grey · Counts as a match
Boys Gi / White grey / Junior (10-11yrs) / -33 kg (2015,2016)
  • Source belt category: grey

3 matches in the rating period