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CZ

Marek Kostka

TAURUS GYM, z.s.

W–L
3–12
Won and lost rating-eligible matches in the past 12 months.
Gi
1,179
Rating based on Gi matches in the past 12 months.
No-Gi
1,133
Rating based on No-Gi matches in the past 12 months.
Current form
1–9
Results from the ten most recent rating-eligible matches.
Opponents
10
Unique opponents faced in rating-eligible matches in the past 12 months.

Tournament history

Events

10
Events
Date Event Result Format Division
2026 AGF Prague Championships CZ · No-Gi · 8–9 yo · grey · ≤29.5 kg 0–2 W–L: Win / Loss No-Gi
  • No Gi Kids / Boys / Kids (8 - 9 yrs) / Gray / Feather I (Up to 29.50 kg)
ADCC Czech National Championship 2025 CZ · No-Gi · 9–10 yo · ≤24 kg 1–1 W–L: Win / Loss No-Gi
  • Boys Junior / 9-10 years / Beginner / -24 kg
N-GEN Kids BJJ Tournament #3 CZ · Gi · 7–9 yo · white/grey · ≤26 kg ; No-Gi · 7–9 yo · ≤26 kg 2–6 W–L: Win / Loss GiNo-Gi
  • Place #4
  • Place #4
AOM Cup Kids 3 CZ · No-Gi · U9 · grey · ≤26 kg ; Gi · U7 · white/grey · ≤23 kg 2–3 W–L: Win / Loss GiNo-Gi
  • Mix Gi / White, Grey / U7 (2019,2018) / -26 kg
  • Boys NoGi / U09 (2018, 2017,2016) / -26 kg
Czech championship submission only 2025 Gi/Nogi CZ · No-Gi · 7–9 yo · ≤24 kg 0–2 W–L: Win / Loss No-Gi
  • NOGI Litle Kids Boy 7-9 years / -24kg
XII. GrappleXmas BJJ Cup CZ · Gi · 5–6 yo · white/grey · ≥22 kg ; No-Gi · 4–6 yo · ≥22 kg 3–3 W–L: Win / Loss GiNo-Gi
  • Place #4
  • Boys No-Gi / All belt / Mighty Mite (4-6 yrs) / +22 kg (2018,2019)
TATAMY 12 (No-GI and GI round robin) CZ · Gi · 4–6 yo · ≤24 kg ; No-Gi · 4–6 yo · ≤24 kg 3–3 W–L: Win / Loss GiNo-Gi
  • Kids / Gi / 4-6 years / Mix / All levels / -24 kg
  • Kids / No Gi / 4-6 years / Mix / All levels / -24 kg
2024 Prague Open CZ · Gi · 6–7 yo · white · ≤20.4 kg 2–0 W–L: Win / Loss Gi
  • Gi Kids / Mixed / Little Kids (6 - 7 yrs) / White (No submission) / Rooster II (Up to 20.40 kg)
N-GEN Kids BJJ Tournament #1 CZ · No-Gi · 4–6 yo · ≥22 kg 0–3 W–L: Win / Loss No-Gi
  • Place #4
AOM Cup Kids 2 CZ · Gi · U7 · white · ≤20 kg 1–1 W–L: Win / Loss Gi
  • Mix Gi / White / U7 (2018,2017) / -22 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 1,226

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%

Classification evidence

Why U10?

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

  • U10 1 event vote Selected outcome

Registrations and outcomes

2026 AGF Prague Championships
U10 · Counts
No Gi Kids / Boys / Kids (8 - 9 yrs) / Gray / Feather I (Up to 29.50 kg)
  • Competition age 8
  • Registered age: u10
  • Source category: u10
ADCC Czech National Championship 2025
Does not count
Boys Junior / 9-10 years / Beginner / -24 kg
  • Competition age 7
N-GEN Kids BJJ Tournament #3
Does not count
Boys Gi / White grey / Pee Wee (7-9 yrs) / -26 kg (2016,2017,2018)
  • Competition age 7
Boys No-Gi / All belt / Pee Wee (7-9 yrs) / -26 kg (2016,2017,2018)
  • Competition age 7
AOM Cup Kids 3
Does not count
Mix Gi / White, Grey / U7 (2019,2018) / -26 kg
  • Competition age 7
  • Registered age: u8
  • Source category: u8
Boys NoGi / U09 (2018, 2017,2016) / -26 kg
  • Competition age 7
  • Registered age: u10
  • Source category: u10

Classification evidence

Why ≤ 24 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

  • ≤ 24 kg 1 competition event Selected outcome
  • ≤ 26 kg 1 competition event
  • ≤ 30 kg 1 competition event

Registrations and outcomes

2026 AGF Prague Championships
≤ 30 kg · Counts as a competition event
No Gi Kids / Boys / Kids (8 - 9 yrs) / Gray / Feather I (Up to 29.50 kg)
  • Registered weight class: Feather I (Up to 29.50 kg)
  • Source competition limit: Feather I (Up to 29.50 kg)

2 matches in the rating period

ADCC Czech National Championship 2025
≤ 24 kg · Counts as a competition event
Boys Junior / 9-10 years / Beginner / -24 kg
  • Registered weight class: -24 kg
  • Source competition limit: -24 kg

1 match in the rating period

N-GEN Kids BJJ Tournament #3
≤ 26 kg · Counts as a competition event
Boys Gi / White grey / Pee Wee (7-9 yrs) / -26 kg (2016,2017,2018)
  • Registered weight class: -26 kg (2016,2017,2018)
  • Source competition limit: -26 kg (2016,2017,2018)

3 matches in the rating period

N-GEN Kids BJJ Tournament #3
≤ 26 kg · Counts as a competition event
Boys No-Gi / All belt / Pee Wee (7-9 yrs) / -26 kg (2016,2017,2018)
  • Registered weight class: -26 kg (2016,2017,2018)
  • Source competition limit: -26 kg (2016,2017,2018)

4 matches in the rating period

AOM Cup Kids 3
≤ 23 kg · Does not count
Mix Gi / White, Grey / U7 (2019,2018) / -26 kg
  • Registered weight class: -23 kg
  • Source competition limit: -23 kg

3 matches in the rating period · conflicting upper weight limits make this event ambiguous

AOM Cup Kids 3
≤ 26 kg · Does not count
Boys NoGi / U09 (2018, 2017,2016) / -26 kg
  • Registered weight class: -26 kg
  • Source competition limit: -26 kg

2 matches in the rating period · conflicting upper weight limits make this event ambiguous

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 10 matches in the rating period Selected outcome

Registrations and outcomes

2026 AGF Prague Championships
grey · Counts as a match
No Gi Kids / Boys / Kids (8 - 9 yrs) / Gray / Feather I (Up to 29.50 kg)
  • Source belt category: grey

2 matches in the rating period

N-GEN Kids BJJ Tournament #3
grey · Counts as a match
Boys Gi / White grey / Pee Wee (7-9 yrs) / -26 kg (2016,2017,2018)
  • Source belt category: grey

3 matches in the rating period

AOM Cup Kids 3
grey · Counts as a match
Boys NoGi / U09 (2018, 2017,2016) / -26 kg
  • Source belt category: grey

2 matches in the rating period

AOM Cup Kids 3
grey · Counts as a match
Mix Gi / White, Grey / U7 (2019,2018) / -26 kg
  • Source belt category: grey

3 matches in the rating period