Marek Kostka - 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 1,226

Rating-period composition

Rating matches: 15 0
Record: 3–12 Previous month 3–12
Opponents: 10 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 0 Rating 1,226

Rating-period composition

Rating matches: 15 0
Record: 3–12 Previous month 3–12
Opponents: 10 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 · 2 left period Change +7 Rating 1,226

Rating-period composition

Rating matches: 15 -2
Record: 3–12 Previous month 3–14
Opponents: 10 0
Events: 4 -1

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.

May 2026 No new matches Change -2 Rating 1,219

Rating-period composition

Rating matches: 17 0
Record: 3–14 Previous month 3–14
Opponents: 10 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.

April 2026 No new matches Change +7 Rating 1,221

Rating-period composition

Rating matches: 17 0
Record: 3–14 Previous month 3–14
Opponents: 10 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 2 new matches Change -15 Rating 1,214

Rating-period composition

Rating matches: 17 +2
Record: 3–14 Previous month 3–12
Opponents: 10 +1
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.

Loss

March 7, 2026 Jan Veselý

2026 AGF Prague Championships No Gi Kids / Boys / Kids (8 - 9 yrs) / Gray / Feather I (Up to 29.50 kg)

Method Submission 01:05 0–4

Marginal influence -8

Loss

March 7, 2026 Jan Veselý

2026 AGF Prague Championships No Gi Kids / Boys / Kids (8 - 9 yrs) / Gray / Feather I (Up to 29.50 kg)

Method Submission 00:32 0–5

Marginal influence -8

February 2026 No new matches Change 0 Rating 1,229

Rating-period composition

Rating matches: 15 0
Record: 3–12 Previous month 3–12
Opponents: 9 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.

January 2026 No new matches Change -1 Rating 1,229

Rating-period composition

Rating matches: 15 0
Record: 3–12 Previous month 3–12
Opponents: 9 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.

December 2025 No new matches · 12 left period Change -61 Rating 1,230

Rating-period composition

Rating matches: 15 -12
Record: 3–12 Previous month 9–18
Opponents: 9 -10
Events: 4 -2

12 older matches left the 12-month period: 6 won and 6 lost. The rating is then recalculated across the full network, so the monthly change is not a sum of separate deductions.

November 2025 1 new match · 5 left period Change -3 Rating 1,291

Rating-period composition

Rating matches: 27 -4
Record: 9–18 Previous month 11–20
Opponents: 19 -5
Events: 6 -1

5 older matches left the 12-month period: 2 won and 3 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

November 23, 2025 Maxim Krmela

ADCC Czech National Championship 2025 Boys Junior / 9-10 years / Beginner / -24 kg

Method Submission 00:45 0–0

Marginal influence -5

October 2025 12 new matches · 2 left period Change -11 Rating 1,294

Rating-period composition

Rating matches: 31 +10
Record: 11–20 Previous month 9–12
Opponents: 24 +7
Events: 7 +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.

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 Vojtěch Glista

N-GEN Kids BJJ Tournament #3 Boys Gi / White grey / Pee Wee (7-9 yrs) / -26 kg (2016,2017,2018)

Method Points 03:00 0–10

Marginal influence -9

Loss

October 25, 2025 Samuel Cetkovsky

N-GEN Kids BJJ Tournament #3 Boys Gi / White grey / Pee Wee (7-9 yrs) / -26 kg (2016,2017,2018)

Method Submission 01:10 0–2

Marginal influence -12

Loss

October 25, 2025 Vojtěch Šatava

N-GEN Kids BJJ Tournament #3 Boys Gi / White grey / Pee Wee (7-9 yrs) / -26 kg (2016,2017,2018)

Method Submission 00:39 0–5

Marginal influence -2

Win

October 25, 2025 Jakub Bedlek

N-GEN Kids BJJ Tournament #3 Boys No-Gi / All belt / Pee Wee (7-9 yrs) / -26 kg (2016,2017,2018)

Method Submission 00:56 4–0

Marginal influence +15

Loss

October 25, 2025 Samuel Cetkovsky

N-GEN Kids BJJ Tournament #3 Boys No-Gi / All belt / Pee Wee (7-9 yrs) / -26 kg (2016,2017,2018)

Method Submission 01:21 0–6

Marginal influence -12

Loss

October 25, 2025 Dominik Bátrla

N-GEN Kids BJJ Tournament #3 Boys No-Gi / All belt / Pee Wee (7-9 yrs) / -26 kg (2016,2017,2018)

Method Points 03:00 2–8

Marginal influence -12

Loss

October 25, 2025 Vojtěch Šatava

N-GEN Kids BJJ Tournament #3 Boys No-Gi / All belt / Pee Wee (7-9 yrs) / -26 kg (2016,2017,2018)

Method Submission 00:27 0–6

Marginal influence -4

Loss

October 5, 2025 Vojtěch Šatava

AOM Cup Kids 3 Boys NoGi / U09 (2018, 2017,2016) / -26 kg

Method Submission 00:17 0–0

Marginal influence -4

Loss

October 5, 2025 Vojtěch Šatava

AOM Cup Kids 3 Boys NoGi / U09 (2018, 2017,2016) / -26 kg

Method Submission 00:34 0–0

Marginal influence -4

Win

October 5, 2025 Anežka Stejskalová

AOM Cup Kids 3 Mix Gi / White, Grey / U7 (2019,2018) / -26 kg

Method Points 03:00 18–2

Marginal influence +17

Loss

October 5, 2025 Edita Tichá

AOM Cup Kids 3 Mix Gi / White, Grey / U7 (2019,2018) / -26 kg

Method Points 03:00 0–6

Marginal influence -8

Win

October 5, 2025 Jonáš Mareček

AOM Cup Kids 3 Mix Gi / White, Grey / U7 (2019,2018) / -26 kg

Method Submission 00:38 10–0

Marginal influence +10

September 2025 No new matches Change -2 Rating 1,305

Rating-period composition

Rating matches: 21 0
Record: 9–12 Previous month 9–12
Opponents: 17 0
Events: 6 0

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

Relevant matches: 10.2

Official ranking percentile: Top 82%

Performance: 14.0 pp below expectation

10.2 weighted matches against 10 different opponents across 4 events

Weighted win rate: 22.3%
Expected win rate: 36.3%
Average opponent rating: 1,361
Repeated-opponent share: 33.3%
Network connectivity: 80.9%