Karel Straka - 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 1,295

Rating-period composition

Rating matches: 17 0
Record: 6–11 Previous month 6–11
Opponents: 11 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.

July 2026 No new matches Change 0 Rating 1,295

Rating-period composition

Rating matches: 17 0
Record: 6–11 Previous month 6–11
Opponents: 11 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.

June 2026 No new matches Change 0 Rating 1,295

Rating-period composition

Rating matches: 17 0
Record: 6–11 Previous month 6–11
Opponents: 11 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.

May 2026 No new matches Change +1 Rating 1,295

Rating-period composition

Rating matches: 17 0
Record: 6–11 Previous month 6–11
Opponents: 11 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.

April 2026 10 new matches Change -21 Rating 1,294

Rating-period composition

Rating matches: 17 +10
Record: 6–11 Previous month 4–3
Opponents: 11 +5
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.

Loss

April 12, 2026 Marek Šlemer

CFS 13 CZECH CHAMPIONSHIP ČSAKJ 2026 Rumble - stužkovaná / NINJAS 9-12 let / 150+ cm

Method Decision 01:00 0–1

Marginal influence -8

Win

April 12, 2026 Mikuláš Brabec

CFS 13 CZECH CHAMPIONSHIP ČSAKJ 2026 Rumble - stužkovaná / NINJAS 9-12 let / 150+ cm

Method Decision 1–0

Marginal influence +10

Loss

April 12, 2026 Marek Šlemer

CFS 13 CZECH CHAMPIONSHIP ČSAKJ 2026 Kids Run / NINJAS 9-12 let / 150+ cm

Method Decision 0–1

Marginal influence -8

Win

April 12, 2026 David Uchytil

CFS 13 CZECH CHAMPIONSHIP ČSAKJ 2026 Kids Run / NINJAS 9-12 let / 150+ cm

Method Decision 1–0

Marginal influence +16

Loss

April 12, 2026 Maroš Mišák

CFS 13 CZECH CHAMPIONSHIP ČSAKJ 2026 Rumble - stužkovaná / NINJAS 9-12 let / 150+ cm

Method Decision 00:56 0–1

Marginal influence -5

Loss

April 12, 2026 Stanislava Špirková

CFS 13 CZECH CHAMPIONSHIP ČSAKJ 2026 Kids Run / NINJAS 9-12 let / 150+ cm

Method Decision 0–1

Marginal influence -13

Loss

April 12, 2026 Jan Švarc

CFS 13 CZECH CHAMPIONSHIP ČSAKJ 2026 Grappling NoGi / U12 Děti chlapci / -50 kg

Method Disqualification 0–0

Marginal influence -7

Loss

April 12, 2026 Jan Švarc

CFS 13 CZECH CHAMPIONSHIP ČSAKJ 2026 Grappling NoGi / U12 Děti chlapci / -50 kg

Method Points 02:00 5–6

Marginal influence -7

Loss

April 12, 2026 Lukáš Lendel

CFS 13 CZECH CHAMPIONSHIP ČSAKJ 2026 Grappling Gi / U12 Děti chlapci / -50 kg

Method Submission 01:33 4–10

Marginal influence -6

Loss

April 12, 2026 Lukáš Lendel

CFS 13 CZECH CHAMPIONSHIP ČSAKJ 2026 Grappling Gi / U12 Děti chlapci / -50 kg

Method Submission 01:23 0–4

Marginal influence -6

March 2026 No new matches · 5 left period Change -2 Rating 1,315

Rating-period composition

Rating matches: 7 -5
Record: 4–3 Previous month 6–6
Opponents: 6 -5
Events: 2 -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.

February 2026 4 new matches Change +43 Rating 1,317

Rating-period composition

Rating matches: 12 +4
Record: 6–6 Previous month 4–4
Opponents: 11 +3
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

February 28, 2026 Karel Schämmer

CZECH FIGHTING SERIES 12 – Under the Lights 2026 Rumble - stužkovaná / NINJAS 9-12 let / 150+ cm

Method Decision 01:00 0–0

Marginal influence +21

Loss

February 28, 2026 Milan Marek

CZECH FIGHTING SERIES 12 – Under the Lights 2026 Rumble - stužkovaná / NINJAS 9-12 let / 150+ cm

Method Points 00:30 0–0

Marginal influence -19

Loss

February 28, 2026 Štěpán Škrabálek

CZECH FIGHTING SERIES 12 – Under the Lights 2026 Grappling NoGi / U12 Děti chlapci / -45 kg

Method Submission 00:19 0–4

Marginal influence -8

Win

February 28, 2026 Patrik Stayr

CZECH FIGHTING SERIES 12 – Under the Lights 2026 Grappling NoGi / U12 Děti chlapci / -45 kg

Method Submission 00:50 2–0

Marginal influence +9

January 2026 No new matches Change 0 Rating 1,274

Rating-period composition

Rating matches: 8 0
Record: 4–4 Previous month 4–4
Opponents: 8 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 0 Rating 1,274

Rating-period composition

Rating matches: 8 0
Record: 4–4 Previous month 4–4
Opponents: 8 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 No new matches · 4 left period Change +62 Rating 1,274

Rating-period composition

Rating matches: 8 -4
Record: 4–4 Previous month 4–8
Opponents: 8 -3
Events: 2 -1

4 older matches left the 12-month period: 0 won and 4 lost. The rating is then recalculated across the full network, so the monthly change is not a sum of separate deductions.

October 2025 3 new matches · 2 left period Change +90 Rating 1,212

Rating-period composition

Rating matches: 12 +1
Record: 4–8 Previous month 2–9
Opponents: 11 +1
Events: 3 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

October 18, 2025 Patrik Stayr

CZECH FIGHTING SERIES 11, Samurai Cup 2025 Kids Run / NINJAS 9-12 let / 150+ cm Chlapci

Method Points 0–0

Marginal influence +12

Win

October 18, 2025 Mikuláš Brabec

CZECH FIGHTING SERIES 11, Samurai Cup 2025 Kids Run / NINJAS 9-12 let / 150+ cm Chlapci

Method Points 0–0

Marginal influence +10

Loss

October 18, 2025 Maroš Mišák

CZECH FIGHTING SERIES 11, Samurai Cup 2025 Kids Run / NINJAS 9-12 let / 150+ cm Chlapci

Method Points 0–0

Marginal influence -5

September 2025 No new matches Change 0 Rating 1,122

Rating-period composition

Rating matches: 11 0
Record: 2–9 Previous month 2–9
Opponents: 10 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.

Relevant matches: 10.1

Official ranking percentile: Top 61%

Performance: 8.9 pp below expectation

10.1 weighted matches against 11 different opponents across 3 events

Weighted win rate: 38.5%
Expected win rate: 47.4%
Average opponent rating: 1,288
Repeated-opponent share: 35.3%
Network connectivity: 80.9%