TopBJJ Index Youth
Language selector
Menu

Calculation details

Rating breakdown for the past 12 months

Close

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 1,118

Rating-period composition

Rating matches
14 0
Record
0–14 Previous month 0–14
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 1,118

Rating-period composition

Rating matches
14 0
Record
0–14 Previous month 0–14
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 1,118

Rating-period composition

Rating matches
14 0
Record
0–14 Previous month 0–14
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 -2 Rating 1,118

Rating-period composition

Rating matches
14 0
Record
0–14 Previous month 0–14
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 6 new matches Change -28 Rating 1,120

Rating-period composition

Rating matches
14 +6
Record
0–14 Previous month 0–8
Opponents
11 +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.
Loss
April 12, 2026 Jaroslav Ježek
CFS 13 CZECH CHAMPIONSHIP ČSAKJ 2026 Kids Run / NINJAS 9-12 let / -150 cm
Method Decision 0–0
Marginal influence -7
Loss
April 12, 2026 Noel Filipovský
CFS 13 CZECH CHAMPIONSHIP ČSAKJ 2026 Kids Run / NINJAS 9-12 let / -150 cm
Method Decision 0–0
Marginal influence -17
Loss
April 12, 2026 Tadeáš Dufek
CFS 13 CZECH CHAMPIONSHIP ČSAKJ 2026 Grappling NoGi / U15 Junioři chlapci / -40 kg
Method Submission 00:49 0–6
Marginal influence -1
Loss
April 12, 2026 David Mařík
CFS 13 CZECH CHAMPIONSHIP ČSAKJ 2026 Grappling NoGi / U15 Junioři chlapci / -40 kg
Method Submission 00:52 0–2
Marginal influence +1
Loss
April 12, 2026 Martin Holeček
CFS 13 CZECH CHAMPIONSHIP ČSAKJ 2026 Grappling Gi / U15 Junioři chlapci / -40 kg
Method Points 02:00 6–10
Marginal influence -8
Loss
April 12, 2026 Martin Holeček
CFS 13 CZECH CHAMPIONSHIP ČSAKJ 2026 Grappling Gi / U15 Junioři chlapci / -40 kg
Method Points 02:00 4–8
Marginal influence -8
March 2026 No new matches · 3 left period Change -67 Rating 1,148

Rating-period composition

Rating matches
8 -3
Record
0–8 Previous month 2–9
Opponents
7 -3
Events
2 -1

3 older matches left the 12-month period: 2 won and 1 lost. The rating is then recalculated across the full network, so the monthly change is not a sum of separate deductions.

February 2026 6 new matches Change +11 Rating 1,215

Rating-period composition

Rating matches
11 +6
Record
2–9 Previous month 2–3
Opponents
10 +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
February 28, 2026 Jakub Zadina
CZECH FIGHTING SERIES 12 – Under the Lights 2026 Grappling NoGi / U15 Junioři chlapci / -40 kg
Method Submission 00:12 0–4
Marginal influence -1
Loss
February 28, 2026 David Mařík
CZECH FIGHTING SERIES 12 – Under the Lights 2026 Grappling NoGi / U15 Junioři chlapci / -40 kg
Method Submission 01:13 1–6
Marginal influence +1
Loss
February 28, 2026 Štěpán Škrabálek
CZECH FIGHTING SERIES 12 – Under the Lights 2026 Grappling Gi / U15 Junioři chlapci / -40 kg
Method Submission 00:32 0–4
Marginal influence -8
Loss
February 28, 2026 Štěpán Škrabálek
CZECH FIGHTING SERIES 12 – Under the Lights 2026 Grappling Gi / U15 Junioři chlapci / -40 kg
Method Submission 00:16 0–4
Marginal influence -8
Loss
February 28, 2026 Martin Sombota
CZECH FIGHTING SERIES 12 – Under the Lights 2026 Rumble - stužkovaná / NINJAS 9-12 let / -150 cm
Method Decision 00:46 0–0
Marginal influence -7
Loss
February 28, 2026 Grigor Dimitrov
CZECH FIGHTING SERIES 12 – Under the Lights 2026 Rumble - stužkovaná / NINJAS 9-12 let / -150 cm
Method Decision 00:21 0–0
Marginal influence -12
January 2026 No new matches Change 0 Rating 1,204

Rating-period composition

Rating matches
5 0
Record
2–3 Previous month 2–3
Opponents
5 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 -1 Rating 1,204

Rating-period composition

Rating matches
5 0
Record
2–3 Previous month 2–3
Opponents
5 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 · 7 left period Change -16 Rating 1,205

Rating-period composition

Rating matches
5 -7
Record
2–3 Previous month 5–7
Opponents
5 -6
Events
2 -1

7 older matches left the 12-month period: 3 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 2 new matches Change -39 Rating 1,221

Rating-period composition

Rating matches
12 +2
Record
5–7 Previous month 5–5
Opponents
11 +2
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
October 18, 2025 Viktor Vychytil
CZECH FIGHTING SERIES 11, Samurai Cup 2025 Kids Run / NINJAS 9-12 let / -150 cm Chlapci
Method Points 0–0
Marginal influence -15
Loss
October 18, 2025 Eliáš Mišák
CZECH FIGHTING SERIES 11, Samurai Cup 2025 Kids Run / NINJAS 9-12 let / -150 cm Chlapci
Method Points 0–0
Marginal influence -12
September 2025 No new matches Change 0 Rating 1,260

Rating-period composition

Rating matches
10 0
Record
5–5 Previous month 5–5
Opponents
9 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.

Relevant matches
9.4
Official ranking percentile
Top 98%
Performance
38.0 pp below expectation

9.4 weighted matches against 11 different opponents across 3 events

Weighted win rate
0.0%
Expected win rate
38.0%
Average opponent rating
1,327
Repeated-opponent share
21.4%
Network connectivity
80.9%