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 1,319

Rating-period composition

Rating matches
16 0
Record
7–9 Previous month 7–9
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.

July 2026 No new matches Change 0 Rating 1,319

Rating-period composition

Rating matches
16 0
Record
7–9 Previous month 7–9
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.

June 2026 No new matches Change -1 Rating 1,319

Rating-period composition

Rating matches
16 0
Record
7–9 Previous month 7–9
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.

May 2026 No new matches Change +1 Rating 1,320

Rating-period composition

Rating matches
16 0
Record
7–9 Previous month 7–9
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.

April 2026 6 new matches Change +40 Rating 1,319

Rating-period composition

Rating matches
16 +6
Record
7–9 Previous month 4–6
Opponents
10 +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 Martin Skřítek
CFS 13 CZECH CHAMPIONSHIP ČSAKJ 2026 Rumble - stužkovaná / NINJAS 9-12 let / -130 cm
Method Decision 0–0
Marginal influence -11
Loss
April 12, 2026 Jakub Poláček
CFS 13 CZECH CHAMPIONSHIP ČSAKJ 2026 Rumble - stužkovaná / NINJAS 9-12 let / -130 cm
Method Decision 0–0
Marginal influence -16
Win
April 12, 2026 Ondrej Saidl
CFS 13 CZECH CHAMPIONSHIP ČSAKJ 2026 Rumble - stužkovaná / DRAGONS 7-8 let / -120 cm
Method Decision 1–0
Marginal influence +10
Win
April 12, 2026 Ondrej Saidl
CFS 13 CZECH CHAMPIONSHIP ČSAKJ 2026 Rumble - stužkovaná / DRAGONS 7-8 let / -120 cm
Method Decision 1–0
Marginal influence +10
Win
April 12, 2026 David Boček
CFS 13 CZECH CHAMPIONSHIP ČSAKJ 2026 Grappling Gi / U12 Děti chlapci / -20 kg
Method Points 02:00 20–0
Marginal influence +12
Loss
April 12, 2026 Elin Kofroňová
CFS 13 CZECH CHAMPIONSHIP ČSAKJ 2026 Grappling Gi / U12 Děti chlapci / -20 kg
Method Points 02:00 0–7
Marginal influence -7
March 2026 No new matches Change +14 Rating 1,279

Rating-period composition

Rating matches
10 0
Record
4–6 Previous month 4–6
Opponents
6 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.

February 2026 6 new matches Change +56 Rating 1,265

Rating-period composition

Rating matches
10 +6
Record
4–6 Previous month 2–2
Opponents
6 +4
Events
2 +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 Maxim Krmela
CZECH FIGHTING SERIES 12 – Under the Lights 2026 Grappling NoGi / U12 Děti chlapci / -25 kg
Method Submission 00:13 0–0
Marginal influence +2
Win
February 28, 2026 Constantin Pîslaru
CZECH FIGHTING SERIES 12 – Under the Lights 2026 Grappling NoGi / U12 Děti chlapci / -25 kg
Method Points 02:00 2–0
Marginal influence +14
Loss
February 28, 2026 Maxim Krmela
CZECH FIGHTING SERIES 12 – Under the Lights 2026 Grappling Gi / U12 Děti chlapci / -25 kg
Method Submission 00:38 2–0
Marginal influence -8
Loss
February 28, 2026 Constantin Pîslaru
CZECH FIGHTING SERIES 12 – Under the Lights 2026 Grappling Gi / U12 Děti chlapci / -25 kg
Method Points 02:00 0–2
Marginal influence -17
Loss
February 28, 2026 Elin Kofroňová
CZECH FIGHTING SERIES 12 – Under the Lights 2026 Rumble - stužkovaná / DRAGONS 7-8 let / -120 cm
Method Decision 00:29 0–0
Marginal influence -8
Win
February 28, 2026 Jaroslav Novotný Jr
CZECH FIGHTING SERIES 12 – Under the Lights 2026 Rumble - stužkovaná / DRAGONS 7-8 let / -120 cm
Method Decision 00:17 0–0
Marginal influence +14
January 2026 No new matches Change 0 Rating 1,209

Rating-period composition

Rating matches
4 0
Record
2–2 Previous month 2–2
Opponents
2 0
Events
1 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 1,209

Rating-period composition

Rating matches
4 0
Record
2–2 Previous month 2–2
Opponents
2 0
Events
1 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 Change -8 Rating 1,209

Rating-period composition

Rating matches
4 0
Record
2–2 Previous month 2–2
Opponents
2 0
Events
1 0

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

October 2025 4 new matches Change Starting point Rating 1,217

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 Josef Demčák
CZECH FIGHTING SERIES 11, Samurai Cup 2025 Kids Run / TIGERS 4-6 let / -110 cm
Method Points 0–0
Marginal influence +14
Win
October 18, 2025 Matěj Skřítek
CZECH FIGHTING SERIES 11, Samurai Cup 2025 Kids Run / TIGERS 4-6 let / -110 cm
Method Points 0–0
Marginal influence +18
Loss
October 18, 2025 Matěj Skřítek
CZECH FIGHTING SERIES 11, Samurai Cup 2025 Rumble - stužkovaná / TIGERS 4-6 let / -110 cm
Method Points 0–1
Marginal influence -8
Loss
October 18, 2025 Josef Demčák
CZECH FIGHTING SERIES 11, Samurai Cup 2025 Rumble - stužkovaná / TIGERS 4-6 let / -110 cm
Method Points 0–1
Marginal influence -12
Relevant matches
9.6
Official ranking percentile
Top 54%
Performance
5.0 pp above expectation

9.6 weighted matches against 10 different opponents across 3 events

Weighted win rate
43.3%
Expected win rate
38.3%
Average opponent rating
1,348
Repeated-opponent share
37.5%
Network connectivity
80.9%