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Petr Chvostal

SAMURAI FIGHT CLUB

W–L
0–4
Won and lost rating-eligible matches in the past 12 months.
Gi
1,106
Rating based on Gi matches in the past 12 months.
No-Gi
-
Rating based on No-Gi matches in the past 12 months.
Current form
0–4
Results from the ten most recent rating-eligible matches.
Opponents
4
Unique opponents faced in rating-eligible matches in the past 12 months.

Tournament history

Events

5
Events
Date Event Result Format Division
CZECH FIGHTING SERIES 11, Samurai Cup 2025 CZ · Gi · U12 · ≤30 kg ; Gi · U12 · ≤30 kg 0–4 W–L: Win / Loss Gi
  • Place #5
  • Fighting / U12 Děti chlapci / -30 kg
INTERNATIONAL CZECH CHAMPIONSHIP ČSAKJ 2025 - CFS 10 CZ · Gi · U12 · ≤25 kg ; Gi · U12 · ≤25 kg ; Rumble - stužkovaná / DRAGONS 7-8 let / -120 cm 4–4 W–L: Win / Loss Gi
  • Place #4
  • Fighting / U12 Děti chlapci / -25 kg
  • Rumble - stužkovaná / DRAGONS 7-8 let / -120 cm
TIGER CUP 2024 - CFS 9 CZ · Gi · U10 · ≤25 kg 0–2 W–L: Win / Loss Gi
  • Grappling Gi / Mladší žáci U10 6-9 let / -25 kg
SAMURAI CUP 2024 - CFS 8 CZ · Gi · U10 · ≤25 kg ; Gi · U10 · ≤25 kg 3–2 W–L: Win / Loss Gi
  • Grappling Gi / Mladší žáci U10 6-9 let / -25 kg
  • Fighting / Mladší žáci U10 6-9 let / -25 kg
  • Gold
International Czech Championship ČSAKJ 2024 - CFS 7 CZ · Gi · U10 · ≤25 kg ; Gi · U10 · ≤25 kg ; Rumble - stužkovaná / DRAGONS 7-8 let / -120 cm 1–4 W–L: Win / Loss Gi
  • Rumble - stužkovaná / DRAGONS 7-8 let / -120 cm
  • Fighting / Mladší žáci U10 6-9 let / -25 kg
  • Grappling Gi / Mladší žáci U10 6-9 let / -25 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 1,106

Rating-period composition

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

July 2026 No new matches Change 0 Rating 1,106

Rating-period composition

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

June 2026 No new matches Change 0 Rating 1,106

Rating-period composition

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

May 2026 No new matches Change -1 Rating 1,106

Rating-period composition

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

April 2026 No new matches Change +3 Rating 1,107

Rating-period composition

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

March 2026 No new matches · 8 left period Change -106 Rating 1,104

Rating-period composition

Rating matches
4 -8
Record
0–4 Previous month 4–8
Opponents
4 -4
Events
1 -1

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

February 2026 No new matches Change +10 Rating 1,210

Rating-period composition

Rating matches
12 0
Record
4–8 Previous month 4–8
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.

January 2026 No new matches Change -3 Rating 1,200

Rating-period composition

Rating matches
12 0
Record
4–8 Previous month 4–8
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 +1 Rating 1,203

Rating-period composition

Rating matches
12 0
Record
4–8 Previous month 4–8
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 · 2 left period Change +20 Rating 1,202

Rating-period composition

Rating matches
12 -2
Record
4–8 Previous month 4–10
Opponents
8 -1
Events
2 -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.

October 2025 4 new matches · 5 left period Change -75 Rating 1,182

Rating-period composition

Rating matches
14 -1
Record
4–10 Previous month 7–8
Opponents
9 +2
Events
3 0

5 older matches left the 12-month period: 3 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.
Loss
October 18, 2025 Petr Krejčík
CZECH FIGHTING SERIES 11, Samurai Cup 2025 Grappling Gi / U12 Děti chlapci / -30 kg
Method Points 02:00 0–4
Marginal influence -29
Loss
October 18, 2025 Jan Rác
CZECH FIGHTING SERIES 11, Samurai Cup 2025 Grappling Gi / U12 Děti chlapci / -30 kg
Method Points 02:00 0–24
Marginal influence -6
Loss
October 18, 2025 Barbora Hypšová
CZECH FIGHTING SERIES 11, Samurai Cup 2025 Fighting / U12 Děti chlapci / -30 kg
Method Points 0–0
Marginal influence -28
Loss
October 18, 2025 David Kovács
CZECH FIGHTING SERIES 11, Samurai Cup 2025 Fighting / U12 Děti chlapci / -30 kg
Method Points 0–0
Marginal influence -17
September 2025 No new matches Change 0 Rating 1,257

Rating-period composition

Rating matches
15 0
Record
7–8 Previous month 7–8
Opponents
7 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
2.8
Official ranking percentile
-
Performance
-

2.8 weighted matches against 4 different opponents across 1 events

Weighted win rate
-
Expected win rate
-
Average opponent rating
1,416
Repeated-opponent share
0.0%
Network connectivity
80.9%

Classification evidence

Why U12?

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

  • U12 1 event vote Selected outcome

Registrations and outcomes

CZECH FIGHTING SERIES 11, Samurai Cup 2025
U12 · Counts
Grappling Gi / U12 Děti chlapci / -30 kg
  • Competition age 9
  • Registered age: u12
  • Source category: u12
Rumble - stužkovaná / DRAGONS 7-8 let / -140 cm
  • Competition age 9
Fighting / U12 Děti chlapci / -30 kg
  • Competition age 9
  • Registered age: u12
  • Source category: u12

Classification evidence

Why ≤ 30 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

  • ≤ 30 kg 1 competition event Selected outcome

Registrations and outcomes

CZECH FIGHTING SERIES 11, Samurai Cup 2025
≤ 30 kg · Counts as a competition event
Grappling Gi / U12 Děti chlapci / -30 kg
  • Registered weight class: -30 kg
  • Source competition limit: -30 kg

2 matches in the rating period

CZECH FIGHTING SERIES 11, Samurai Cup 2025
Does not count
Rumble - stužkovaná / DRAGONS 7-8 let / -140 cm

No matches in the rating period · no valid weight evidence

CZECH FIGHTING SERIES 11, Samurai Cup 2025
≤ 30 kg · Counts as a competition event
Fighting / U12 Děti chlapci / -30 kg
  • Registered weight class: -30 kg
  • Source competition limit: -30 kg

2 matches in the rating period