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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.

Tournament history

Events

10
Events
Date Event Result Format Division
N-GEN Kids BJJ Tournament #3 CZ · Gi · 10–11 yo · white/grey · ≤39 kg ; No-Gi · 12–13 yo · ≤42 kg 4–2 W–L: Win / Loss GiNo-Gi
  • 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)
N-GEN Kids BJJ Tournament #2 CZ · Gi · 10–11 yo · white/grey · ≤42 kg ; No-Gi · 10–11 yo · ≤39 kg 4–4 W–L: Win / Loss GiNo-Gi
  • Boys Gi / White grey / Junior (10-11yrs) / -42 kg (2014,2015)
  • Place #4
XIV. REBEL BJJ CUP CZ · Gi · 10–11 yo · white/grey · ≤42 kg ; No-Gi · 12–13 yo · ≤38 kg 3–2 W–L: Win / Loss GiNo-Gi
  • 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)
N-GEN Kids BJJ Tournament #1 CZ · Gi · 7–9 yo · white/grey · ≤35 kg 1–1 W–L: Win / Loss Gi
  • Boys Gi / White grey / Pee Wee (7-9 yrs) / -35 kg (2015,2016,2017)
NoEXCUSE! 8 CZ · Gi · ≤36 kg 0–2 W–L: Win / Loss Gi
  • GI - Little Kids Mix / -36 kg
XIII. REBEL BJJ CUP KIDS CZ · Gi · 7–9 yo · white/grey · ≤32 kg 1–1 W–L: Win / Loss Gi
  • Boys Gi / White grey / Pee Wee (7-9 yrs) / -32 kg (2015,2016,2017)
XI. GrappleXmas BJJ Cup KIDS CZ · Gi · 7–9 yo · yellow/orange/green · ≤32 kg 0–4 W–L: Win / Loss Gi
  • Place #6
Czech championship submission only CZ · Gi · ≤32 kg 0–2 W–L: Win / Loss Gi
  • GI - Little Kids Mix 7-9y / -32 kg
XII. REBEL BJJ CUP KIDS CZ · Gi · 9 yo · white/grey · ≤27 kg 2–1 W–L: Win / Loss Gi
  • Boys Gi / White grey / Pee Wee III (9yrs) / -27 kg
Czech Open Gi CZ · Gi · 7–8 yo · ≤28 kg 0–4 W–L: Win / Loss Gi
  • Place #9

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