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David Voloshchuk

Naru BJJ and Self-Defence

W–L
11–5
Won and lost rating-eligible matches in the past 12 months.
Gi
1,425
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
6–4
Results from the ten most recent rating-eligible matches.
Opponents
11
Unique opponents faced in rating-eligible matches in the past 12 months.

Tournament history

Events

4
Events
Date Event Result Format Division
GRIND 13 Kids (NO-GI & GI ROUND ROBIN) CZ · Gi · 10–12 yo · ≤36 kg 4–2 W–L: Win / Loss Gi
  • Place #4
2026 AGF Prague Championships CZ · Gi · 10–11 yo · white · ≤38.6 kg 1–1 W–L: Win / Loss Gi
  • Gi Kids / Boys / Pre Teen (10 - 11 yrs) / White / Feather III (Up to 38.60 kg)
TATAMY 17 KIDS (No-GI and GI round robin) CZ · Gi · 10–12 yo · white/grey · ≤36 kg 4–1 W–L: Win / Loss Gi
  • Kids / Gi / 10-12 years / Boys / White/grey belt / -36 kg
2025 AGF Prague Open CZ · Gi · 10–11 yo · white · ≤34 kg 2–1 W–L: Win / Loss Gi
  • Gi Kids / Boys / Pre Teen (10 - 11 yrs) / White / Feather II (Up to 34.00 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 +3 Rating 1,425

Rating-period composition

Rating matches
16 0
Record
11–5 Previous month 11–5
Opponents
11 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 +6 Rating 1,422

Rating-period composition

Rating matches
16 0
Record
11–5 Previous month 11–5
Opponents
11 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 +1 Rating 1,416

Rating-period composition

Rating matches
16 0
Record
11–5 Previous month 11–5
Opponents
11 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 +1 Rating 1,415

Rating-period composition

Rating matches
16 0
Record
11–5 Previous month 11–5
Opponents
11 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 6 new matches Change +44 Rating 1,414

Rating-period composition

Rating matches
16 +6
Record
11–5 Previous month 7–3
Opponents
11 +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
April 25, 2026 Filip Vicány
GRIND 13 Kids (NO-GI & GI ROUND ROBIN) Gi / 10-12 years / Boy / -36 kg / Beginner
Method Submission 03:54 0–0
Marginal influence +10
Win
April 25, 2026 Jeremiáš Fuccillo
GRIND 13 Kids (NO-GI & GI ROUND ROBIN) Gi / 10-12 years / Boy / -36 kg / Beginner
Method Points 04:00 6–0
Marginal influence +6
Win
April 25, 2026 David Chromčák
GRIND 13 Kids (NO-GI & GI ROUND ROBIN) Gi / 10-12 years / Boy / -36 kg / Beginner
Method Points 04:00 6–0
Marginal influence +13
Win
April 25, 2026 Nicolas Bonetti
GRIND 13 Kids (NO-GI & GI ROUND ROBIN) Gi / 10-12 years / Boy / -36 kg / Beginner
Method Points 05:09 6–0
Marginal influence +14
Loss
April 25, 2026 Nicolas Bonetti
GRIND 13 Kids (NO-GI & GI ROUND ROBIN) Gi / 10-12 years / Boy / -36 kg / Beginner
Method Submission 01:03 0–3
Marginal influence -15
Loss
April 25, 2026 Roman Marčenko
GRIND 13 Kids (NO-GI & GI ROUND ROBIN) Gi / 10-12 years / Boy / -36 kg / Beginner
Method Submission 0–0
Marginal influence -12
March 2026 2 new matches Change -5 Rating 1,370

Rating-period composition

Rating matches
10 +2
Record
7–3 Previous month 6–2
Opponents
8 +2
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.
Win
March 7, 2026 Lukáš Habich
2026 AGF Prague Championships Gi Kids / Boys / Pre Teen (10 - 11 yrs) / White / Feather III (Up to 38.60 kg)
Method Points 03:00 23–2
Marginal influence +7
Loss
March 7, 2026 Roman Marčenko
2026 AGF Prague Championships Gi Kids / Boys / Pre Teen (10 - 11 yrs) / White / Feather III (Up to 38.60 kg)
Method Submission 02:56 4–4
Marginal influence -16
February 2026 No new matches Change +3 Rating 1,375

Rating-period composition

Rating matches
8 0
Record
6–2 Previous month 6–2
Opponents
6 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 1,372

Rating-period composition

Rating matches
8 0
Record
6–2 Previous month 6–2
Opponents
6 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 No new matches Change +1 Rating 1,376

Rating-period composition

Rating matches
8 0
Record
6–2 Previous month 6–2
Opponents
6 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.

November 2025 5 new matches Change +154 Rating 1,375

Rating-period composition

Rating matches
8 +5
Record
6–2 Previous month 2–1
Opponents
6 +5
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.
Win
November 1, 2025 Roman Marčenko
TATAMY 17 KIDS (No-GI and GI round robin) Kids / Gi / 10-12 years / Boys / White/grey belt / -36 kg
Method Disqualification 00:10 0–0
Marginal influence +13
Loss
November 1, 2025 Erik Macháček
TATAMY 17 KIDS (No-GI and GI round robin) Kids / Gi / 10-12 years / Boys / White/grey belt / -36 kg
Method Submission 01:53 0–0
Marginal influence -18
Win
November 1, 2025 Kiril Delos Santos
TATAMY 17 KIDS (No-GI and GI round robin) Kids / Gi / 10-12 years / Boys / White/grey belt / -36 kg
Method Points 04:00 3–0
Marginal influence +23
Win
November 1, 2025 Jeremiáš Fuccillo
TATAMY 17 KIDS (No-GI and GI round robin) Kids / Gi / 10-12 years / Boys / White/grey belt / -36 kg
Method Submission 02:31 0–0
Marginal influence +6
Win
November 1, 2025 Daniel Reis Adamka
TATAMY 17 KIDS (No-GI and GI round robin) Kids / Gi / 10-12 years / Boys / White/grey belt / -36 kg
Method Submission 00:45 0–0
Marginal influence +10
October 2025 No new matches Change 0 Rating 1,221

Rating-period composition

Rating matches
3 0
Record
2–1 Previous month 2–1
Opponents
1 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 3 new matches Change Starting point Rating 1,221

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 27, 2025 Valentin Karavans
2025 AGF Prague Open Gi Kids / Boys / Pre Teen (10 - 11 yrs) / White / Feather II (Up to 34.00 kg)
Method Submission 02:51 8–4
Marginal influence +12
Loss
September 27, 2025 Valentin Karavans
2025 AGF Prague Open Gi Kids / Boys / Pre Teen (10 - 11 yrs) / White / Feather II (Up to 34.00 kg)
Method Submission 02:02 6–11
Marginal influence -16
Win
September 27, 2025 Valentin Karavans
2025 AGF Prague Open Gi Kids / Boys / Pre Teen (10 - 11 yrs) / White / Feather II (Up to 34.00 kg)
Method Points 03:00 6–3
Marginal influence +12
Relevant matches
9
Official ranking percentile
Top 20%
Performance
12.8 pp above expectation

9 weighted matches against 11 different opponents across 4 events

Weighted win rate
70.4%
Expected win rate
57.5%
Average opponent rating
1,329
Repeated-opponent share
31.3%
Network connectivity
80.9%

Classification evidence

Why U14?

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

  • U14 2 event votes Selected outcome

Registrations and outcomes

GRIND 13 Kids (NO-GI & GI ROUND ROBIN)
U14 · Counts
Gi / 10-12 years / Boy / -36 kg / Beginner
  • Competition age 12
2026 AGF Prague Championships
U14 · Counts
Gi Kids / Boys / Pre Teen (10 - 11 yrs) / White / Feather III (Up to 38.60 kg)
  • Competition age 12
  • Registered age: u12
  • Source category: u12
TATAMY 17 KIDS (No-GI and GI round robin)
Does not count
Kids / Gi / 10-12 years / Boys / White/grey belt / -36 kg
  • Competition age 11
2025 AGF Prague Open
Does not count
Competition T-shirt / Youth Medium
Gi Kids / Boys / Pre Teen (10 - 11 yrs) / White / Feather II (Up to 34.00 kg)
  • Competition age 11
  • Registered age: u12
  • Source category: u12

Classification evidence

Why ≤ 36 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

  • ≤ 36 kg 2 competition events Selected outcome
  • ≤ 39 kg 1 competition event

Registrations and outcomes

GRIND 13 Kids (NO-GI & GI ROUND ROBIN)
≤ 36 kg · Counts as a competition event
Gi / 10-12 years / Boy / -36 kg / Beginner
  • Registered weight class: -36 kg
  • Source competition limit: -36 kg

6 matches in the rating period

2026 AGF Prague Championships
≤ 39 kg · Counts as a competition event
Gi Kids / Boys / Pre Teen (10 - 11 yrs) / White / Feather III (Up to 38.60 kg)
  • Registered weight class: Feather III (Up to 38.60 kg)
  • Source competition limit: Feather III (Up to 38.60 kg)

2 matches in the rating period

TATAMY 17 KIDS (No-GI and GI round robin)
≤ 36 kg · Counts as a competition event
Kids / Gi / 10-12 years / Boys / White/grey belt / -36 kg
  • Registered weight class: -36 kg
  • Source competition limit: -36 kg

5 matches in the rating period

2025 AGF Prague Open
Does not count
Competition T-shirt / Youth Medium

No matches in the rating period · no valid weight evidence

2025 AGF Prague Open
≤ 34 kg · Does not count
Gi Kids / Boys / Pre Teen (10 - 11 yrs) / White / Feather II (Up to 34.00 kg)
  • Registered weight class: Feather II (Up to 34.00 kg)
  • Source competition limit: Feather II (Up to 34.00 kg)

3 matches in the rating period · outside the three most recent unambiguous events

Classification evidence

Why White?

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

  • white 5 matches in the rating period Selected outcome
  • grey 5 matches in the rating period

Registrations and outcomes

2026 AGF Prague Championships
white · Counts as a match
Gi Kids / Boys / Pre Teen (10 - 11 yrs) / White / Feather III (Up to 38.60 kg)
  • Source belt category: white

2 matches in the rating period

TATAMY 17 KIDS (No-GI and GI round robin)
grey · Counts as a match
Kids / Gi / 10-12 years / Boys / White/grey belt / -36 kg
  • Source belt category: grey

5 matches in the rating period

2025 AGF Prague Open
white · Counts as a match
Gi Kids / Boys / Pre Teen (10 - 11 yrs) / White / Feather II (Up to 34.00 kg)
  • Source belt category: white

3 matches in the rating period