Samuel Kulak - Rating | TopBJJ Index

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%