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CZ

Viktor Ambrož Krkoška

Jungle BJJ Prague

W–L
4–2
Won and lost rating-eligible matches in the past 12 months.
Gi
1,330
Rating based on Gi matches in the past 12 months.
No-Gi
1,139
Rating based on No-Gi matches in the past 12 months.
Current form
4–2
Results from the ten most recent rating-eligible matches.
Opponents
6
Unique opponents faced in rating-eligible matches in the past 12 months.

Honours

Medals and placements

Gold
2
Silver
3
Bronze
5
Total medals
10
Events with results
10

Full career record

Wins
15
Losses
23
Matches
38
Win rate
39.5%

Ways of winning

Submission
13
Points
1
Decision
0
Disqualification
0

Personal records

Longest winning streak
4
Longest submission streak
4

Recent recorded placements

  1. N-GEN Kids BJJ Tournament #3

    CZ Event record 4–2

    • Boys No-Gi / All belt / Junior I (12-13 yrs) / -42 kg (2012,2013)
    • Boys Gi / White grey / Junior (10-11yrs) / -39 kg (2014,2015)

  3. XIV. REBEL BJJ CUP

    CZ Event record 3–2

    • Boys Gi / White grey / Junior (10-11yrs) / -42 kg (2014,2015)
    • Boys No-Gi / All belt / Junior I (12-13 yrs) / -38 kg (2012,2013)

  5. NoEXCUSE! 8

    CZ Event record 0–2

    • GI - Little Kids Mix / -36 kg

12-month performance profile

How the results were achieved

Past 12 months
Current win streak
2
Unique opponents
6
Distinct events
1

Ways of winning

  • Submission 3 75%
  • Points 1 25%
  • Decision 0 0%
  • Other recorded result 0 0%

Gi versus No-Gi

Gi

Rating
1330
Record
4–0
Win rate
100%
Submission share
75%

No-Gi

Rating
1139
Record
0–2
Win rate
0%
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
1,343
Change over 90 days
+36
Highest rating in 12 months
1,384
Performance versus expectation
-
Schedule strength
-
Average opponent rating
1,332
Weighted win rate
-
Expected win rate
-
Repeat-opponent share
0%
Effective evidence
4.5
Confidence
66/100

Opponents

Opposition and rivalries

The strongest recorded win, rematches and opponents faced repeatedly.

Rematches 2–13 2–13 across 15 rematches against 5 repeat opponents.

Top 10 highest-ranked defeated opponents

Past 12 months

  1. #1502 Jindřich Sochor · N-GEN Kids BJJ Tournament #3 Pts 9–8
  2. #2099 Vojtěch Sochor · N-GEN Kids BJJ Tournament #3 Sub 01:35 7–9
  3. #3003 David Polášek · N-GEN Kids BJJ Tournament #3 Sub 00:16 0–0

Full career

  1. #1502 Jindřich Sochor · N-GEN Kids BJJ Tournament #3 Pts 9–8
  2. #2099 Vojtěch Sochor · N-GEN Kids BJJ Tournament #3 Sub 01:35 7–9
  3. #3003 David Polášek · N-GEN Kids BJJ Tournament #3 Sub 00:16 0–0

Rivals

Opponent Head-to-head record Matches
Matias Horný 0–3 3
Marek Vykoupil 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 1,343

Rating-period composition

Rating matches
6 0
Record
4–2 Previous month 4–2
Opponents
6 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 1,343

Rating-period composition

Rating matches
6 0
Record
4–2 Previous month 4–2
Opponents
6 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 +9 Rating 1,343

Rating-period composition

Rating matches
6 0
Record
4–2 Previous month 4–2
Opponents
6 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 · 8 left period Change -33 Rating 1,334

Rating-period composition

Rating matches
6 -8
Record
4–2 Previous month 8–6
Opponents
6 -6
Events
1 -1

8 older matches left the 12-month period: 4 won and 4 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 +4 Rating 1,367

Rating-period composition

Rating matches
14 0
Record
8–6 Previous month 8–6
Opponents
12 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 · 5 left period Change -14 Rating 1,363

Rating-period composition

Rating matches
14 -5
Record
8–6 Previous month 11–8
Opponents
12 -4
Events
2 -1

5 older matches left the 12-month period: 3 won and 2 lost. The rating is then recalculated across the full network, so the monthly change is not a sum of separate deductions.

February 2026 No new matches Change +1 Rating 1,377

Rating-period composition

Rating matches
19 0
Record
11–8 Previous month 11–8
Opponents
16 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 1,376

Rating-period composition

Rating matches
19 0
Record
11–8 Previous month 11–8
Opponents
16 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 Change +3 Rating 1,377

Rating-period composition

Rating matches
19 0
Record
11–8 Previous month 11–8
Opponents
16 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.

November 2025 No new matches · 2 left period Change -10 Rating 1,374

Rating-period composition

Rating matches
19 -2
Record
11–8 Previous month 12–9
Opponents
16 -2
Events
3 -1

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.

October 2025 6 new matches · 2 left period Change +35 Rating 1,384

Rating-period composition

Rating matches
21 +4
Record
12–9 Previous month 8–9
Opponents
18 +3
Events
4 0

2 older matches left the 12-month period: 0 won and 2 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.
Loss
October 25, 2025 Vitězslav Pítr
N-GEN Kids BJJ Tournament #3 Boys No-Gi / All belt / Junior I (12-13 yrs) / -42 kg (2012,2013)
Method Submission 00:32 0–6
Marginal influence -28
Loss
October 25, 2025 Simon Kovac
N-GEN Kids BJJ Tournament #3 Boys No-Gi / All belt / Junior I (12-13 yrs) / -42 kg (2012,2013)
Method Submission 01:37 0–0
Marginal influence -23
Win
October 25, 2025 Vojtěch Sochor
N-GEN Kids BJJ Tournament #3 Boys Gi / White grey / Junior (10-11yrs) / -39 kg (2014,2015)
Method Submission 01:35 7–9
Marginal influence +25
Win
October 25, 2025 Jindřich Sochor
N-GEN Kids BJJ Tournament #3 Boys Gi / White grey / Junior (10-11yrs) / -39 kg (2014,2015)
Method Points 03:00 9–8
Marginal influence +29
Win
October 25, 2025 Marek Vykoupil
N-GEN Kids BJJ Tournament #3 Boys Gi / White grey / Junior (10-11yrs) / -39 kg (2014,2015)
Method Submission 00:23 6–0
Marginal influence +23
Win
October 25, 2025 David Polášek
N-GEN Kids BJJ Tournament #3 Boys Gi / White grey / Junior (10-11yrs) / -39 kg (2014,2015)
Method Submission 00:16 0–0
Marginal influence +16
September 2025 No new matches Change +1 Rating 1,349

Rating-period composition

Rating matches
17 0
Record
8–9 Previous month 8–9
Opponents
15 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.

Relevant matches
4.5
Official ranking percentile
-
Performance
-

4.5 weighted matches against 6 different opponents across 1 events

Weighted win rate
-
Expected win rate
-
Average opponent rating
1,332
Repeated-opponent share
0.0%
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 #3
U12 · Counts
Boys No-Gi / All belt / Junior I (12-13 yrs) / -42 kg (2012,2013)
  • Competition age 10
  • Registered age: u14
  • Source category: u14
Boys Gi / White grey / Junior (10-11yrs) / -39 kg (2014,2015)
  • Competition age 10
  • Registered age: u12
  • Source category: u12

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 4 matches in the rating period Selected outcome

Registrations and outcomes

N-GEN Kids BJJ Tournament #3
grey · Counts as a match
Boys Gi / White grey / Junior (10-11yrs) / -39 kg (2014,2015)
  • Source belt category: grey

4 matches in the rating period