Ko Blaauw 🇳🇱
Oomke Blaauw
295 profile views · Last seen 1 week(s) ago
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About
- Training since first belt9 year(s) and 7 month(s)
- Medals15
6
3
6
- LocationDen Haag, Netherlands
- AcademyBJJ Delft Unclaimed
- AffiliationRIO Grappling Club
- Member sinceFebruary 20206 years on Beltchecker.com One of the first 10,000 members
Gi or no-gi
Gi and no-gi equallynow
50% Gi50% No-gi
Achievements
3 of 18 unlockedProfile manually reviewed & certificate issued
Current rank verified by promoting instructor
Name verified by credit card
Verifications received11 / 25
102550
Years trained9 / 10
5101520
Gold medals6 / 10
51025
Competition matches0 / 10
1050100
Forum posts1 / 500
5001,000
Wall
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Gallery
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IBJJF European Gi 2026 - M5 Absolute
IBJJF European Gi 2026 M5, -94.3kg
IBJJF European No-Gi 2025 M5 Absolute
IBJJF European No-Gi 2025 - M5 -91.5kg
IBJJF European 2025 M5 -94,3kg
IBJJF Maters Europe 2025
IBJJF European Gi 2020, M4, -88,3kgPromotion history
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- 1 month, 18 days
Black belt Current belt
September 28, 2026Delft, Netherland
Promoted byRoberto Atalla

- 2 years, 3 months, 9 days
Brown belt
June 19, 2024Delft/The Netherland/BJJ Delft
Promoted byFarzin Karbalai-SadeghTogether withFloris DekkerPart of Rio Grappling

- 1 year, 11 months, 28 days
Purple belt
June 22, 2022Delft/Netherlands/BJJ Delft
Promoted byFarzin Karbalai-SadeghTogether withFloris Dekker 
3 years, 3 months, 16 daysBlue belt
March 6, 2019Delft/The Netherlands/BJJ Delft
Promoted byFarzin Karbalai-SadeghTogether withFloris Dekker- 1 year, 11 months, 5 days
White belt
April 1, 2017Delft|The Netherlands\\BJJ Delft
Votes received for current rank
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"Legit profile congrats on the black"
"Looks legit to me"
"solid"
"Legit ! Congratulations !"
"Looks legit, done ✔️"
"Gefeliciteerd ome Ko!"
"verified"
"I don't know Oomke, but there seems to be enough evidence to verify rank. :)"
"Saw him compete at the european no gi championship, legit"
"Congrats on the black belt promotion "
Medals
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IBJJF European No-Gi 2026

Nov 1
IBJJF 2026 Master International Jiu-Jitsu Championship - Europe
Apr 26
IBJJF European Gi 2026
Jan 19
IBJJF European Gi 2026
Jan 19
Dutch Open 2025
Dec 2025
IBJJF European No-Gi 2025
Oct 2025
IBJJF European No-Gi 2025
Oct 2025
IBJJF 2025 Master International Jiu-Jitsu Championship - Europe
May 2025
IBJJF 2025 Master International Jiu-Jitsu Championship - Europe
May 2025
European IBJJF Jiu-Jitsu Championship 2025
Jan 2025
Dutch Open 2024
Dec 2024
BJJ Dutch Open 2023
Dec 2023
European IBJJF Jiu-Jitsu Championship
Jan 2020
European IBJJF Jiu-Jitsu Championship
Jan 2020
BJJ Dutch Open 2018
Oct 2018

