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SK

Alex Kukumberg

Jiu-Jitsu Academy Bratislava

W–L
1–1
Won and lost rating-eligible matches in the past 12 months.
Gi
1,211
Rating based on Gi matches in the past 12 months.
No-Gi
-
Rating based on No-Gi matches in the past 12 months.
Current form
1–1
Results from the ten most recent rating-eligible matches.
Opponents
2
Unique opponents faced in rating-eligible matches in the past 12 months.

Honours

Medals and placements

Gold
5
Silver
3
Bronze
0
Total medals
8
Events with results
7

Full career record

Wins
25
Losses
6
Matches
31
Win rate
80.6%

Ways of winning

Submission
21
Points
2
Decision
2
Disqualification
0

Personal records

Longest winning streak
19
Longest submission streak
11
Longest gold streak
1

Recent recorded placements

  5. TATAMY 5 (NO-GI and GI)

    CZ Event record 9–2

    • Kids / No Gi / 10-12 years / Boys / Beginner / -45 kg
    • Kids / Gi / 10-12 years / Boys / White/grey belt / -45 kg

12-month performance profile

How the results were achieved

Past 12 months
Current win streak
0
Unique opponents
2
Distinct events
1

Ways of winning

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

Gi versus No-Gi

Gi

Rating
1211
Record
1–1
Win rate
50%
Submission share
0%

No-Gi

Rating
-
Record
-
Win rate
-
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
1,211
Change over 90 days
+11
Highest rating in 12 months
1,341
Performance versus expectation
-
Schedule strength
-
Average opponent rating
1,279
Weighted win rate
-
Expected win rate
-
Repeat-opponent share
0%
Effective evidence
1.7
Confidence
36/100

Opponents

Opposition and rivalries

The strongest recorded win, rematches and opponents faced repeatedly.

Rematches 10–4 10–4 across 14 rematches against 7 repeat opponents.

Top 10 highest-ranked defeated opponents

Past 12 months

No win over a currently ranked opponent in this period.

Full career

  1. #1678 Adam Rudij · TATAMY 15 KIDS (No-GI and GI round robin) Dec 0–0

Rivals

Opponent Head-to-head record Matches
David Adamčík 2–0 2
Jan Maxa 0–2 2
Jiří Váňa 2–0 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 1,211

Rating-period composition

Rating matches
2 0
Record
1–1 Previous month 1–1
Opponents
2 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 1,211

Rating-period composition

Rating matches
2 0
Record
1–1 Previous month 1–1
Opponents
2 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 -10 Rating 1,211

Rating-period composition

Rating matches
2 0
Record
1–1 Previous month 1–1
Opponents
2 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 · 2 left period Change -110 Rating 1,221

Rating-period composition

Rating matches
2 -2
Record
1–1 Previous month 3–1
Opponents
2 -2
Events
1 -1

2 older matches left the 12-month period: 2 won and 0 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 +1 Rating 1,331

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.

March 2026 No new matches Change -12 Rating 1,330

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.

February 2026 No new matches Change +5 Rating 1,342

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 -4 Rating 1,337

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 2 new matches Change +20 Rating 1,341

Rating-period composition

Rating matches
4 +2
Record
3–1 Previous month 2–0
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.
Loss
December 6, 2025 Michal Pařil
TATAMY 18 KIDS (No-GI and GI round robin) Kids / Gi / 13-14 years / Boys / Yellow/orange/green belt / -65 kg
Method Points 04:00 0–3
Marginal influence -39
Win
December 6, 2025 Tomas Krejci
TATAMY 18 KIDS (No-GI and GI round robin) Kids / Gi / 13-14 years / Boys / Yellow/orange/green belt / -65 kg
Method Decision 04:00 0–0
Marginal influence +46
November 2025 No new matches Change +2 Rating 1,321

Rating-period composition

Rating matches
2 0
Record
2–0 Previous month 2–0
Opponents
2 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.

October 2025 No new matches Change -12 Rating 1,319

Rating-period composition

Rating matches
2 0
Record
2–0 Previous month 2–0
Opponents
2 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.

September 2025 No new matches Change +1 Rating 1,331

Rating-period composition

Rating matches
2 0
Record
2–0 Previous month 2–0
Opponents
2 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.

Relevant matches
1.7
Official ranking percentile
-
Performance
-

1.7 weighted matches against 2 different opponents across 1 events

Weighted win rate
-
Expected win rate
-
Average opponent rating
1,279
Repeated-opponent share
0.0%
Network connectivity
80.9%

Classification evidence

Why U16?

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

  • U16 1 event vote Selected outcome

Registrations and outcomes

TATAMY 18 KIDS (No-GI and GI round robin)
U16 · Counts
Kids / Gi / 13-14 years / Boys / Yellow/orange/green belt / -65 kg
  • Competition age 14
TATAMY 16 KIDS (No-GI and GI round robin)
Does not count
Kids / Gi / 13-14 years / Boys / Yellow/orange/green belt / -65 kg
  • Competition age 14

Classification evidence

Why ≤ 65 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

  • ≤ 65 kg 1 competition event Selected outcome

Registrations and outcomes

TATAMY 18 KIDS (No-GI and GI round robin)
≤ 65 kg · Counts as a competition event
Kids / Gi / 13-14 years / Boys / Yellow/orange/green belt / -65 kg
  • Registered weight class: -65 kg
  • Source competition limit: -65 kg

2 matches in the rating period

TATAMY 16 KIDS (No-GI and GI round robin)
Does not count
Kids / Gi / 13-14 years / Boys / Yellow/orange/green belt / -65 kg
  • Registered weight class: -65 kg
  • Source competition limit: -65 kg

No matches in the rating period · no valid weight evidence

Classification evidence

Why Green?

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

  • green 2 matches in the rating period Selected outcome

Registrations and outcomes

TATAMY 18 KIDS (No-GI and GI round robin)
green · Counts as a match
Kids / Gi / 13-14 years / Boys / Yellow/orange/green belt / -65 kg
  • Source belt category: green

2 matches in the rating period