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CZ

Jan Koch

TAURUS GYM, z.s.

W–L
9–10
Won and lost rating-eligible matches in the past 12 months.
Gi
-
Rating based on Gi matches in the past 12 months.
No-Gi
1,372
Rating based on No-Gi matches in the past 12 months.
Current form
5–5
Results from the ten most recent rating-eligible matches.
Opponents
14
Unique opponents faced in rating-eligible matches in the past 12 months.

Tournament history

Events

17
Events
Date Event Result Format Division
2026 AGF Prague Championships CZ · No-Gi · 8–9 yo · white · ≤34 kg ; No-Gi · white · ≤38.6 kg 2–2 W–L: Win / Loss No-Gi
  • No Gi Kids Challenger / Boys / White Challenger / Feather III (Up to 38.60 kg)
  • No Gi Kids / Mixed / Kids (8 - 9 yrs) / White / Feather II (Up to 34.00 kg)
ADCC Czech National Championship 2025 CZ · No-Gi · 11–12 yo · ≤36 kg 1–1 W–L: Win / Loss No-Gi
  • Boys Junior / 11-12 years / Beginner / -36 kg
N-GEN Kids BJJ Tournament #3 CZ · No-Gi · 10–11 yo · ≤36 kg 1–2 W–L: Win / Loss No-Gi
  • Boys No-Gi / All belt / Junior (10-11yrs) / -36 kg (2014,2015)
AOM Cup Kids 3 CZ · No-Gi · U9 · white · ≤42 kg ; No-Gi · ≤36 kg 5–1 W–L: Win / Loss No-Gi
  • NoGi Challenge / -36 kg
  • Boys NoGi / White / U09 (2017,2016) / -42 kg
2025 AGF Prague Open CZ · No-Gi · 8–9 yo · grey · ≤34 kg ; No-Gi · ≤34 kg 1–4 W–L: Win / Loss No-Gi
  • No Gi Kids / Boys / Kids (8 - 9 yrs) / Gray / Feather II (Up to 34.00 kg)
  • No Gi Kids Challenger / Boys / Regular Challenger / Feather II (Up to 34.00 kg)
Czech championship submission only 2025 Gi/Nogi CZ · No-Gi · 7–9 yo · ≤32 kg 2–0 W–L: Win / Loss No-Gi
  • NOGI Litle Kids Boy 7-9 years / -32kg
TATAMY 12 (No-GI and GI round robin) CZ · No-Gi · 7–9 yo · ≤32 kg 1–3 W–L: Win / Loss No-Gi
  • Place #10
2024 Prague Open 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)
N-GEN Kids BJJ Tournament #1 CZ · No-Gi · 7–9 yo · ≤29 kg 0–4 W–L: Win / Loss No-Gi
  • Place #5
Pardubice Grappling Open vol.2 CZ · No-Gi · 7–10 yo · ≤32 kg 0–2 W–L: Win / Loss No-Gi
  • Boys 7-10 years No-Gi / Beginner / -32Kg
AOM Cup Kids 2 CZ · No-Gi · U9 · white/grey · ≤26 kg 1–1 W–L: Win / Loss No-Gi
  • Boys NoGi / White / Grey / U09 (2016,2015) / -26 kg
ADCC Czech Open 2024 CZ · No-Gi · 7–8 yo · ≤28 kg 2–1 W–L: Win / Loss No-Gi
  • Kids Mix 7-8 years / Beginner / -28kg
XI. GrappleXmas BJJ Cup KIDS CZ · No-Gi · 7–9 yo · ≤29 kg 2–2 W–L: Win / Loss No-Gi
  • Boys No-Gi / All belt / Pee Wee (7-9 yrs) / -29 kg (2014,2015,2016)
TATAMY 7 (NO-GI and GI round robin) CZ · No-Gi · 7–9 yo · ≤28 kg 0–4 W–L: Win / Loss No-Gi
  • Place #6
AOM Cup Kids CZ · No-Gi · 8 yo · white · ≤34 kg 0–2 W–L: Win / Loss No-Gi
  • Boys NoGi / White / Pee Wee II (8yrs) / -34 kg
TATAMY 6 (NO-GI and GI round robin) CZ · No-Gi · 7–9 yo · ≤28 kg 0–4 W–L: Win / Loss No-Gi
  • Place #6
TATAMY 5 (NO-GI and GI) CZ · No-Gi · 7–9 yo · ≤28 kg 2–2 W–L: Win / Loss No-Gi
  • Place #5

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 +1 Rating 1,372

Rating-period composition

Rating matches
19 0
Record
9–10 Previous month 9–10
Opponents
14 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.

July 2026 No new matches Change -1 Rating 1,371

Rating-period composition

Rating matches
19 0
Record
9–10 Previous month 9–10
Opponents
14 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.

June 2026 No new matches · 2 left period Change -25 Rating 1,372

Rating-period composition

Rating matches
19 -2
Record
9–10 Previous month 11–10
Opponents
14 0
Events
5 -1

2 older matches left the 12-month period: 2 won and 0 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 -3 Rating 1,397

Rating-period composition

Rating matches
21 0
Record
11–10 Previous month 11–10
Opponents
14 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.

April 2026 No new matches Change -1 Rating 1,400

Rating-period composition

Rating matches
21 0
Record
11–10 Previous month 11–10
Opponents
14 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.

March 2026 4 new matches Change +21 Rating 1,401

Rating-period composition

Rating matches
21 +4
Record
11–10 Previous month 9–8
Opponents
14 +3
Events
6 +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
March 7, 2026 Lukáš Habich
2026 AGF Prague Championships No Gi Kids Challenger / Boys / White Challenger / Feather III (Up to 38.60 kg)
Method Submission 00:57 0–2
Marginal influence +9
Loss
March 7, 2026 Matyáš Habich
2026 AGF Prague Championships No Gi Kids Challenger / Boys / White Challenger / Feather III (Up to 38.60 kg)
Method Points 03:00 0–2
Marginal influence -10
Win
March 7, 2026 Unknown opponent
2026 AGF Prague Championships No Gi Kids / Mixed / Kids (8 - 9 yrs) / White / Feather II (Up to 34.00 kg)
Method Points 03:00 14–3
Marginal influence +19
Loss
March 7, 2026 Matyáš Habich
2026 AGF Prague Championships No Gi Kids / Mixed / Kids (8 - 9 yrs) / White / Feather II (Up to 34.00 kg)
Method Submission 00:27 0–3
Marginal influence -10
February 2026 No new matches Change +3 Rating 1,380

Rating-period composition

Rating matches
17 0
Record
9–8 Previous month 9–8
Opponents
11 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.

January 2026 No new matches Change 0 Rating 1,377

Rating-period composition

Rating matches
17 0
Record
9–8 Previous month 9–8
Opponents
11 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.

December 2025 No new matches · 3 left period Change +49 Rating 1,377

Rating-period composition

Rating matches
17 -3
Record
9–8 Previous month 9–11
Opponents
11 -3
Events
5 -1

3 older matches left the 12-month period: 0 won and 3 lost. The rating is then recalculated across the full network, so the monthly change is not a sum of separate deductions.

November 2025 2 new matches · 6 left period Change +69 Rating 1,328

Rating-period composition

Rating matches
20 -4
Record
9–11 Previous month 8–16
Opponents
14 -3
Events
6 -1

6 older matches left the 12-month period: 0 won and 6 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
November 23, 2025 Ingrid Chmelarova
ADCC Czech National Championship 2025 Boys Junior / 11-12 years / Beginner / -36 kg
Method Submission 01:05 0–0
Marginal influence +15
Loss
November 23, 2025 Adéla Gutov Jeličová
ADCC Czech National Championship 2025 Boys Junior / 11-12 years / Beginner / -36 kg
Method Submission 02:24 0–0
Marginal influence -7
October 2025 8 new matches · 4 left period Change +111 Rating 1,259

Rating-period composition

Rating matches
24 +4
Record
8–16 Previous month 4–16
Opponents
17 +3
Events
7 0

4 older matches left the 12-month period: 1 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
October 25, 2025 Simon Kovac
N-GEN Kids BJJ Tournament #3 Boys No-Gi / All belt / Junior (10-11yrs) / -36 kg (2014,2015)
Method Points 03:00 0–14
Marginal influence -9
Loss
October 25, 2025 Adéla Gutov Jeličová
N-GEN Kids BJJ Tournament #3 Boys No-Gi / All belt / Junior (10-11yrs) / -36 kg (2014,2015)
Method Submission 00:47 0–0
Marginal influence -7
Win
October 25, 2025 David Polášek
N-GEN Kids BJJ Tournament #3 Boys No-Gi / All belt / Junior (10-11yrs) / -36 kg (2014,2015)
Method Submission 00:59 6–0
Marginal influence +6
Win
October 5, 2025 Vojtěch Jána
AOM Cup Kids 3 Boys NoGi / White / U09 (2017,2016) / -42 kg
Method Points 03:00 9–2
Marginal influence +22
Win
October 5, 2025 Denis Kaplon
AOM Cup Kids 3 Boys NoGi / White / U09 (2017,2016) / -42 kg
Method Submission 02:00 18–2
Marginal influence +11
Win
October 5, 2025 Filip Vesely
AOM Cup Kids 3 Boys NoGi / White / U09 (2017,2016) / -42 kg
Method Submission 00:40 4–0
Marginal influence +14
Win
October 5, 2025 Michal Mitlehner
AOM Cup Kids 3 NoGi Challenge / -36 kg
Method Points 03:00 7–0
Marginal influence +13
Loss
October 5, 2025 Miroslav Lagron
AOM Cup Kids 3 NoGi Challenge / -36 kg
Method Points 03:00 0–13
Marginal influence -8
September 2025 5 new matches Change -24 Rating 1,148

Rating-period composition

Rating matches
20 +5
Record
4–16 Previous month 3–12
Opponents
14 +1
Events
7 +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
September 27, 2025 Unknown opponent
2025 AGF Prague Open No Gi Kids Challenger / Boys / Regular Challenger / Feather II (Up to 34.00 kg)
Method Points 03:00 0–5
Marginal influence -20
Loss
September 27, 2025 Alex Janda
2025 AGF Prague Open No Gi Kids Challenger / Boys / Regular Challenger / Feather II (Up to 34.00 kg)
Method Points 03:00 4–8
Marginal influence -9
Loss
September 27, 2025 Alex Janda
2025 AGF Prague Open No Gi Kids / Boys / Kids (8 - 9 yrs) / Gray / Feather II (Up to 34.00 kg)
Method Points 03:00 4–23
Marginal influence -9
Loss
September 27, 2025 Alex Janda
2025 AGF Prague Open No Gi Kids / Boys / Kids (8 - 9 yrs) / Gray / Feather II (Up to 34.00 kg)
Method Points 03:00 0–1
Marginal influence -9
Win
September 27, 2025 Alex Janda
2025 AGF Prague Open No Gi Kids / Boys / Kids (8 - 9 yrs) / Gray / Feather II (Up to 34.00 kg)
Method Points 03:00 6–5
Marginal influence +9
Relevant matches
11.3
Official ranking percentile
Top 36%
Performance
3.1 pp above expectation

11.3 weighted matches against 14 different opponents across 5 events

Weighted win rate
54.2%
Expected win rate
51.2%
Average opponent rating
1,382
Repeated-opponent share
26.3%
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

2026 AGF Prague Championships
U12 · Counts
No Gi Kids Challenger / Boys / White Challenger / Feather III (Up to 38.60 kg)
  • Competition age 10
  • Registered age: u16
  • Source category: u16
No Gi Kids / Mixed / Kids (8 - 9 yrs) / White / Feather II (Up to 34.00 kg)
  • Competition age 10
  • Registered age: u10
  • Source category: u10
ADCC Czech National Championship 2025
Does not count
Boys Junior / 11-12 years / Beginner / -36 kg
  • Competition age 9
N-GEN Kids BJJ Tournament #3
Does not count
Boys No-Gi / All belt / Junior (10-11yrs) / -36 kg (2014,2015)
  • Competition age 9
  • Registered age: u12
  • Source category: u12
AOM Cup Kids 3
Does not count
NoGi Challenge / -36 kg
  • Competition age 9
  • Registered age: u12
  • Source category: u12
Boys NoGi / White / U09 (2017,2016) / -42 kg
  • Competition age 9
  • Registered age: u10
  • Source category: u10
2025 AGF Prague Open
Does not count
No Gi Kids Challenger / Boys / Regular Challenger / Feather II (Up to 34.00 kg)
  • Competition age 9
  • Registered age: u12
  • Source category: u12
No Gi Kids / Boys / Kids (8 - 9 yrs) / Gray / Feather II (Up to 34.00 kg)
  • Competition age 9
  • Registered age: u10
  • Source category: u10

Classification evidence

Why ≤ 34 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

  • ≤ 34 kg 1 competition event Selected outcome
  • ≤ 36 kg 2 competition events

Registrations and outcomes

2026 AGF Prague Championships
≤ 39 kg · Does not count
No Gi Kids Challenger / Boys / White Challenger / Feather III (Up to 38.60 kg)
  • Registered weight class: Feather III (Up to 38.60 kg)
  • Source competition limit: Feather III (Up to 38.60 kg)

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

2026 AGF Prague Championships
≤ 34 kg · Does not count
No Gi Kids / Mixed / Kids (8 - 9 yrs) / White / Feather II (Up to 34.00 kg)
  • Registered weight class: Feather II (Up to 34.00 kg)
  • Source competition limit: Feather II (Up to 34.00 kg)

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

ADCC Czech National Championship 2025
≤ 36 kg · Counts as a competition event
Boys Junior / 11-12 years / Beginner / -36 kg
  • Registered weight class: -36 kg
  • Source competition limit: -36 kg

2 matches in the rating period

N-GEN Kids BJJ Tournament #3
≤ 36 kg · Counts as a competition event
Boys No-Gi / All belt / Junior (10-11yrs) / -36 kg (2014,2015)
  • Registered weight class: -36 kg (2014,2015)
  • Source competition limit: -36 kg (2014,2015)

3 matches in the rating period

AOM Cup Kids 3
≤ 36 kg · Does not count
NoGi Challenge / -36 kg
  • Registered weight class: -36 kg
  • Source competition limit: -36 kg

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

AOM Cup Kids 3
≤ 42 kg · Does not count
Boys NoGi / White / U09 (2017,2016) / -42 kg
  • Registered weight class: -42 kg
  • Source competition limit: -42 kg

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

2025 AGF Prague Open
≤ 34 kg · Counts as a competition event
No Gi Kids Challenger / Boys / Regular Challenger / Feather II (Up to 34.00 kg)
  • Registered weight class: Feather II (Up to 34.00 kg)
  • Source competition limit: Feather II (Up to 34.00 kg)

2 matches in the rating period

2025 AGF Prague Open
≤ 34 kg · Counts as a competition event
No Gi Kids / Boys / Kids (8 - 9 yrs) / Gray / Feather II (Up to 34.00 kg)
  • Registered weight class: Feather II (Up to 34.00 kg)
  • Source competition limit: Feather II (Up to 34.00 kg)

3 matches in the rating period

Classification evidence

Why White?

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

  • white 7 matches in the rating period Selected outcome
  • grey 3 matches in the rating period

Registrations and outcomes

2026 AGF Prague Championships
white · Counts as a match
No Gi Kids Challenger / Boys / White Challenger / Feather III (Up to 38.60 kg)
  • Source belt category: white

2 matches in the rating period

2026 AGF Prague Championships
white · Counts as a match
No Gi Kids / Mixed / Kids (8 - 9 yrs) / White / Feather II (Up to 34.00 kg)
  • Source belt category: white

2 matches in the rating period

AOM Cup Kids 3
white · Counts as a match
Boys NoGi / White / U09 (2017,2016) / -42 kg
  • Source belt category: white

3 matches in the rating period

2025 AGF Prague Open
grey · Counts as a match
No Gi Kids / Boys / Kids (8 - 9 yrs) / Gray / Feather II (Up to 34.00 kg)
  • Source belt category: grey

3 matches in the rating period