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CZ

Samuel Kulak

Draculino Karviná

W–L
10–5
Won and lost rating-eligible matches in the past 12 months.
Gi
1,393
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
13
Unique opponents faced in rating-eligible matches in the past 12 months.

Tournament history

Events

7
Events
Date Event Result Format Division
TATAMY 20: PRAGUE - KIDS (round robin) CZ 0–0 W–L: Win / Loss Gi
  • Bronze
TATAMY 19: Czech Open Championship (kids) CZ · Gi · 13–14 yo · white/grey · ≤55 kg 2–0 W–L: Win / Loss Gi
  • Kids / Gi / 13-14 years / Boys / White/grey belt / -55 kg
TATAMY 18 KIDS (No-GI and GI round robin) CZ · Gi · 13–14 yo · white/grey · ≤55 kg 3–2 W–L: Win / Loss Gi
  • Kids / Gi / 13-14 years / Boys / White/grey belt / -55 kg
TATAMY 17 KIDS (No-GI and GI round robin) CZ · Gi · 13–14 yo · white/grey · ≤50 kg 1–2 W–L: Win / Loss Gi
  • Kids / Gi / 13-14 years / Boys / White/grey belt / -50 kg
TATAMY 16 KIDS (No-GI and GI round robin) CZ · Gi · 13–14 yo · white/grey · ≤55 kg 4–1 W–L: Win / Loss Gi
  • Kids / Gi / 13-14 years / Boys / White/grey belt / -55 kg
TATAMY 15 KIDS (No-GI and GI round robin) CZ · Gi · 13–14 yo · white/grey · ≤50 kg 1–1 W–L: Win / Loss Gi
  • Kids / Gi / 13-14 years / Boys / White/grey belt / -50 kg
TATAMY 13 KIDS (No-GI and GI round robin) CZ · Gi · 13–14 yo · white/grey · ≤50 kg 0–2 W–L: Win / Loss Gi
  • Kids / Gi / 13-14 years / Boys / White/grey belt / -50 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 0 Rating 1,393

Rating-period composition

Rating matches
15 0
Record
10–5 Previous month 10–5
Opponents
13 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 -1 Rating 1,393

Rating-period composition

Rating matches
15 0
Record
10–5 Previous month 10–5
Opponents
13 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 1,394

Rating-period composition

Rating matches
15 0
Record
10–5 Previous month 10–5
Opponents
13 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 · 2 left period Change -2 Rating 1,395

Rating-period composition

Rating matches
15 -2
Record
10–5 Previous month 11–6
Opponents
13 -1
Events
4 -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.

April 2026 No new matches Change +6 Rating 1,397

Rating-period composition

Rating matches
17 0
Record
11–6 Previous month 11–6
Opponents
14 0
Events
5 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 -10 Rating 1,391

Rating-period composition

Rating matches
17 0
Record
11–6 Previous month 11–6
Opponents
14 0
Events
5 0

No matches were added or left the period. The change comes from the monthly revaluation of opponents across the full network.

February 2026 2 new matches · 2 left period Change +45 Rating 1,401

Rating-period composition

Rating matches
17 0
Record
11–6 Previous month 9–8
Opponents
14 0
Events
5 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.
Win
February 21, 2026 Felix Lebeda
TATAMY 19: Czech Open Championship (kids) Kids / Gi / 13-14 years / Boys / White/grey belt / -55 kg
Method Submission 02:59 9–2
Marginal influence +14
Win
February 21, 2026 Andrej Scharringer
TATAMY 19: Czech Open Championship (kids) Kids / Gi / 13-14 years / Boys / White/grey belt / -55 kg
Method Submission 00:54 0–0
Marginal influence +13
January 2026 No new matches Change -1 Rating 1,356

Rating-period composition

Rating matches
17 0
Record
9–8 Previous month 9–8
Opponents
14 0
Events
5 0

No matches were added or left the period. The change comes from the monthly revaluation of opponents across the full network.

December 2025 5 new matches Change +58 Rating 1,357

Rating-period composition

Rating matches
17 +5
Record
9–8 Previous month 6–6
Opponents
14 +4
Events
5 +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
December 6, 2025 Jindrich Konecny
TATAMY 18 KIDS (No-GI and GI round robin) Kids / Gi / 13-14 years / Boys / White/grey belt / -55 kg
Method Points 04:00 4–0
Marginal influence +14
Loss
December 6, 2025 Sergei Chernyaev
TATAMY 18 KIDS (No-GI and GI round robin) Kids / Gi / 13-14 years / Boys / White/grey belt / -55 kg
Method Submission 03:15 0–0
Marginal influence -19
Win
December 6, 2025 Michal Studnica
TATAMY 18 KIDS (No-GI and GI round robin) Kids / Gi / 13-14 years / Boys / White/grey belt / -55 kg
Method Submission 03:24 0–0
Marginal influence +12
Win
December 6, 2025 Matyas Ursacher
TATAMY 18 KIDS (No-GI and GI round robin) Kids / Gi / 13-14 years / Boys / White/grey belt / -55 kg
Method Submission 01:29 0–0
Marginal influence +12
Loss
December 6, 2025 Jindrich Konecny
TATAMY 18 KIDS (No-GI and GI round robin) Kids / Gi / 13-14 years / Boys / White/grey belt / -55 kg
Method Submission 05:41 0–4
Marginal influence -13
November 2025 3 new matches Change +7 Rating 1,299

Rating-period composition

Rating matches
12 +3
Record
6–6 Previous month 5–4
Opponents
10 +2
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
November 1, 2025 Tobiáš Podroužek
TATAMY 17 KIDS (No-GI and GI round robin) Kids / Gi / 13-14 years / Boys / White/grey belt / -50 kg
Method Submission 02:50 0–0
Marginal influence +18
Loss
November 1, 2025 Adam Lichý
TATAMY 17 KIDS (No-GI and GI round robin) Kids / Gi / 13-14 years / Boys / White/grey belt / -50 kg
Method Points 04:00 -1–0
Marginal influence -21
Loss
November 1, 2025 Šimon Dyntar
TATAMY 17 KIDS (No-GI and GI round robin) Kids / Gi / 13-14 years / Boys / White/grey belt / -50 kg
Method Points 04:00 0–3
Marginal influence -28
October 2025 No new matches Change +5 Rating 1,292

Rating-period composition

Rating matches
9 0
Record
5–4 Previous month 5–4
Opponents
8 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.

September 2025 5 new matches Change +114 Rating 1,287

Rating-period composition

Rating matches
9 +5
Record
5–4 Previous month 1–3
Opponents
8 +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.
Win
September 20, 2025 Vojtěch Kotula
TATAMY 16 KIDS (No-GI and GI round robin) Kids / Gi / 13-14 years / Boys / White/grey belt / -55 kg
Method Submission 03:08 0–-2
Marginal influence +12
Win
September 20, 2025 Vojtěch Kotula
TATAMY 16 KIDS (No-GI and GI round robin) Kids / Gi / 13-14 years / Boys / White/grey belt / -55 kg
Method Decision 04:00 0–0
Marginal influence +12
Win
September 20, 2025 Sebastian Sitsch
TATAMY 16 KIDS (No-GI and GI round robin) Kids / Gi / 13-14 years / Boys / White/grey belt / -55 kg
Method Submission 00:27 0–0
Marginal influence +7
Win
September 20, 2025 Vratko Pjontek
TATAMY 16 KIDS (No-GI and GI round robin) Kids / Gi / 13-14 years / Boys / White/grey belt / -55 kg
Method Submission 02:43 0–0
Marginal influence +9
Loss
September 20, 2025 Michal Sobota
TATAMY 16 KIDS (No-GI and GI round robin) Kids / Gi / 13-14 years / Boys / White/grey belt / -55 kg
Method Submission 00:24 0–0
Marginal influence -14
Relevant matches
9.9
Official ranking percentile
Top 29%
Performance
10.4 pp above expectation

9.9 weighted matches against 13 different opponents across 4 events

Weighted win rate
66.2%
Expected win rate
55.8%
Average opponent rating
1,279
Repeated-opponent share
13.3%
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 20: PRAGUE - KIDS (round robin)
Does not count
Kids / Gi / 15-18 years / Boys / White/grey belt / -60 kg
  • Competition age 15
TATAMY 19: Czech Open Championship (kids)
U16 · Counts
Kids / Gi / 13-14 years / Boys / White/grey belt / -55 kg
  • Competition age 15
TATAMY 18 KIDS (No-GI and GI round robin)
Does not count
Kids / Gi / 13-14 years / Boys / White/grey belt / -55 kg
  • Competition age 14
TATAMY 17 KIDS (No-GI and GI round robin)
Does not count
Kids / Gi / 13-14 years / Boys / White/grey belt / -50 kg
  • Competition age 14
TATAMY 16 KIDS (No-GI and GI round robin)
Does not count
Kids / Gi / 13-14 years / Boys / White/grey belt / -55 kg
  • Competition age 14

Classification evidence

Why ≤ 50 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

  • ≤ 50 kg 1 competition event Selected outcome
  • ≤ 55 kg 2 competition events

Registrations and outcomes

TATAMY 20: PRAGUE - KIDS (round robin)
Does not count
Kids / Gi / 15-18 years / Boys / White/grey belt / -60 kg
  • Registered weight class: -60 kg
  • Source competition limit: -60 kg

No matches in the rating period · no valid weight evidence

TATAMY 19: Czech Open Championship (kids)
≤ 55 kg · Counts as a competition event
Kids / Gi / 13-14 years / Boys / White/grey belt / -55 kg
  • Registered weight class: -55 kg
  • Source competition limit: -55 kg

2 matches in the rating period

TATAMY 18 KIDS (No-GI and GI round robin)
≤ 55 kg · Counts as a competition event
Kids / Gi / 13-14 years / Boys / White/grey belt / -55 kg
  • Registered weight class: -55 kg
  • Source competition limit: -55 kg

5 matches in the rating period

TATAMY 17 KIDS (No-GI and GI round robin)
≤ 50 kg · Counts as a competition event
Kids / Gi / 13-14 years / Boys / White/grey belt / -50 kg
  • Registered weight class: -50 kg
  • Source competition limit: -50 kg

3 matches in the rating period

TATAMY 16 KIDS (No-GI and GI round robin)
≤ 55 kg · Does not count
Kids / Gi / 13-14 years / Boys / White/grey belt / -55 kg
  • Registered weight class: -55 kg
  • Source competition limit: -55 kg

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

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 15 matches in the rating period Selected outcome

Registrations and outcomes

TATAMY 19: Czech Open Championship (kids)
grey · Counts as a match
Kids / Gi / 13-14 years / Boys / White/grey belt / -55 kg
  • Source belt category: grey

2 matches in the rating period

TATAMY 18 KIDS (No-GI and GI round robin)
grey · Counts as a match
Kids / Gi / 13-14 years / Boys / White/grey belt / -55 kg
  • Source belt category: grey

5 matches in the rating period

TATAMY 17 KIDS (No-GI and GI round robin)
grey · Counts as a match
Kids / Gi / 13-14 years / Boys / White/grey belt / -50 kg
  • Source belt category: grey

3 matches in the rating period

TATAMY 16 KIDS (No-GI and GI round robin)
grey · Counts as a match
Kids / Gi / 13-14 years / Boys / White/grey belt / -55 kg
  • Source belt category: grey

5 matches in the rating period