TopBJJ Index Youth

TopBJJ Index

Search TopBJJ Index
Language selector
Menu
CZ

Jonáš Mareček

Choketopus gym

≤ 24 kg
W–L
0–12
Won and lost rating-eligible matches in the past 12 months.
Gi
1,005
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
1–9
Results from the ten most recent rating-eligible matches.
Opponents
12
Unique opponents faced in rating-eligible matches in the past 12 months.

Honours

Medals and placements

Gold
0
Silver
1
Bronze
1
Total medals
2
Events with results
5

Full career record

Wins
2
Losses
13
Matches
15
Win rate
13.3%

Ways of winning

Submission
0
Points
1
Decision
0
Disqualification
0

Personal records

Longest winning streak
2

Recent recorded placements

  1. GRIND 14 Kids

    CZ Event record 1–1

    • No-Gi / 7-9 years / Mixed (4 - 9 years) / -28 kg / Mixed (4 - 9 years)

12-month performance profile

How the results were achieved

Past 12 months
Current win streak
0
Unique opponents
12
Distinct events
4

Ways of winning

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

Gi versus No-Gi

Gi

Rating
1005
Record
0–12
Win rate
0%
Submission share
-

No-Gi

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

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
1,005
Change over 90 days
-51
Highest rating in 12 months
1,087
Performance versus expectation
-23.7 pp
Schedule strength
Top 78%
Average opponent rating
1,277
Weighted win rate
0%
Expected win rate
24%
Repeat-opponent share
0%
Effective evidence
9.1
Confidence
83/100

Opponents

Opposition and rivalries

The strongest recorded win, rematches and opponents faced repeatedly.

Around this athlete

Athlete Rank Rating
Jonáš Mareček #3059 1,005
Davyd Makarov #3060 984

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 1,005

Rating-period composition

Rating matches
12 0
Record
0–12 Previous month 0–12
Opponents
12 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.

July 2026 No new matches Change 0 Rating 1,005

Rating-period composition

Rating matches
12 0
Record
0–12 Previous month 0–12
Opponents
12 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.

June 2026 No new matches Change 0 Rating 1,005

Rating-period composition

Rating matches
12 0
Record
0–12 Previous month 0–12
Opponents
12 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.

May 2026 No new matches Change -6 Rating 1,005

Rating-period composition

Rating matches
12 0
Record
0–12 Previous month 0–12
Opponents
12 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.

April 2026 3 new matches Change -26 Rating 1,011

Rating-period composition

Rating matches
12 +3
Record
0–12 Previous month 0–9
Opponents
12 +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.
Loss
April 25, 2026 Leon Daiber Tran
GRIND 13 Kids (NO-GI & GI ROUND ROBIN) Gi / 7-9 years / Mixed / -28 kg / Mixed (4 - 9 years)
Method Submission 00:10 0–2
Marginal influence -5
Loss
April 25, 2026 Viktorie Mala
GRIND 13 Kids (NO-GI & GI ROUND ROBIN) Gi / 7-9 years / Mixed / -28 kg / Mixed (4 - 9 years)
Method Points 03:00 0–2
Marginal influence -14
Loss
April 25, 2026 Jonáš Pokorný
GRIND 13 Kids (NO-GI & GI ROUND ROBIN) Gi / 7-9 years / Mixed / -28 kg / Mixed (4 - 9 years)
Method Points 03:00 0–9
Marginal influence -11
March 2026 4 new matches Change -29 Rating 1,037

Rating-period composition

Rating matches
9 +4
Record
0–9 Previous month 0–5
Opponents
9 +4
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 Botond Kertész
TATAMY 20: PRAGUE - KIDS (round robin) Kids / Gi / 7-9 years / Mix / All levels / -28 kg
Method Submission 00:10 0–0
Marginal influence -3
Loss
March 21, 2026 Emma Trýsková
TATAMY 20: PRAGUE - KIDS (round robin) Kids / Gi / 7-9 years / Mix / All levels / -28 kg
Method Submission 00:07 0–0
Marginal influence -7
Loss
March 21, 2026 Jakub Onger
TATAMY 20: PRAGUE - KIDS (round robin) Kids / Gi / 7-9 years / Mix / All levels / -28 kg
Method Submission 00:11 0–3
Marginal influence -4
Loss
March 21, 2026 Aleš David
TATAMY 20: PRAGUE - KIDS (round robin) Kids / Gi / 7-9 years / Mix / All levels / -28 kg
Method Submission 01:24 0–11
Marginal influence -13
February 2026 No new matches Change +4 Rating 1,066

Rating-period composition

Rating matches
5 0
Record
0–5 Previous month 0–5
Opponents
5 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 1,062

Rating-period composition

Rating matches
5 0
Record
0–5 Previous month 0–5
Opponents
5 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 -18 Rating 1,062

Rating-period composition

Rating matches
5 +2
Record
0–5 Previous month 0–3
Opponents
5 +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 Šimon Havalda
TATAMY 18 KIDS (No-GI and GI round robin) Kids / Gi / 4-6 years / Mix / All levels / -24 kg
Method Points 02:00 0–2
Marginal influence -12
Loss
December 6, 2025 Ivan Antonio Blazanovic
TATAMY 18 KIDS (No-GI and GI round robin) Kids / Gi / 4-6 years / Mix / All levels / -24 kg
Method Decision 02:00 0–0
Marginal influence -18
November 2025 No new matches Change -7 Rating 1,080

Rating-period composition

Rating matches
3 0
Record
0–3 Previous month 0–3
Opponents
3 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 3 new matches Change Starting point Rating 1,087

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
October 5, 2025 Edita Tichá
AOM Cup Kids 3 Mix Gi / White, Grey / U7 (2019,2018) / -26 kg
Method Submission 01:38 0–10
Marginal influence -8
Loss
October 5, 2025 Anežka Stejskalová
AOM Cup Kids 3 Mix Gi / White, Grey / U7 (2019,2018) / -26 kg
Method Submission 00:21 0–6
Marginal influence -15
Loss
October 5, 2025 Marek Kostka
AOM Cup Kids 3 Mix Gi / White, Grey / U7 (2019,2018) / -26 kg
Method Submission 00:38 0–10
Marginal influence -16
Relevant matches
9.1
Official ranking percentile
Top 100%
Performance
23.7 pp below expectation

9.1 weighted matches against 12 different opponents across 4 events

Weighted win rate
0.0%
Expected win rate
23.7%
Average opponent rating
1,277
Repeated-opponent share
0.0%
Network connectivity
80.9%

Classification evidence

Why U8?

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

  • U8 2 event votes Selected outcome

Registrations and outcomes

GRIND 13 Kids (NO-GI & GI ROUND ROBIN)
U8 · Counts
Gi / 7-9 years / Mixed / -28 kg / Mixed (4 - 9 years)
  • Competition age 7
TATAMY 20: PRAGUE - KIDS (round robin)
U8 · Counts
Kids / Gi / 7-9 years / Mix / All levels / -28 kg
  • Competition age 7
TATAMY 18 KIDS (No-GI and GI round robin)
Does not count
Kids / Gi / 4-6 years / Mix / All levels / -24 kg
  • Competition age 6
  • Registered age: u8
  • Source category: u8
AOM Cup Kids 3
Does not count
Mix Gi / White, Grey / U7 (2019,2018) / -26 kg
  • Competition age 6
  • Registered age: u8
  • Source category: u8

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

AOM Cup Kids 3
grey · Counts as a match
Mix Gi / White, Grey / U7 (2019,2018) / -26 kg
  • Source belt category: grey

3 matches in the rating period