Sakubara Invitational

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The Sakubara Invitational is a invite only, online tournament. This is a Chinmukwan Taekwon-Do Federation sanctioned event.


Events Primary Division Secondary Division
  • Breaking (Wood only)
  • Traditional forms
  • Creative forms
  • Weapons
  • Beginner
  • Intermediate
  • Advanced
  • Six and under
  • 7-9
  • 10-13
  • 14-16
  • Adults
  • Black Belt
  • Youth
  • Adult
  • Team forms
  • Creative team forms
  • Self Defense
  • Beginner
  • Intermediate
  • Advanced
  • Black Belt

Subdivisions will be created where needed.


Event Date
Sponsorship registration March 15 - April 16
Schools accept invitation April 16
Competitors are recorded May 2 - 15
Recordings are submitted
Competitors are organized into divisions May 16 - 22
Competitors are judged
Results are announced May 23 - 28
Awards are mailed to schools
Video Premiere May 29
Awards are given by school instructors


  • The organizer of the Sakubara Invitational reserves to right to make changes to these rules.


  • The competitive age is determined by the birth year of the competitor.
    • Example: 2021 - 2015 = 6
  • Only members of invited schools may compete.
  • Competitors must wear their entire school uniform.
    • Exceptions made for Creative events.
  • Competitors must compete with the highest rank that they have achieved at the time of recording.
    • If they have rank in a weapon based martial art, then they must use that rank when competing in weapon divisions.
  • Competitors will be placed on a group based on their rank.
Group Belt Color
Beginner White



Intermediate Green



Advanced Brown


Black Belt Black


  • The standard ring size is 16x16'.
    • For competitors under 16, ring size may either be 16x16' or 12x12'.
  • Rings boundaries must be marked by blue scotch tape.
  • Rings are measured from the inside of the boundaries.
  • Background should be clear of any imagery. Exceptions may be made for permanent/ semi-permanent imagery.


  • 5 judges per ring.
    • 3 judges are only permitted when there are not enough total judges.
  • Whenever possible, the judges should be from different schools.
  • Minimum rank for judging under black belt divisions is 1st Dan.
  • Minimum rank for judging black belt divisions is 4th Dan.
  • Judges may vote to disqualify competitors for rule violations. Must be majority vote (2/3 or 3/5)
  • Judges are not able to see other judges rankings until all judges have submitted their rankings to the score keeper.
  • 1 score keeper per division.
  • Scorekeeper will keep track of the judges rankings.
  • Scorekeeper will break ties using methods stated below.


  • Judges will rank competitors in the order of their choosing from 1st to 5th.
  • The rank will be converted into points. The lowest score wins. (Like golf)
    • 1st is 1 point, 3rd is 3 points, etc.
  • For 5 or more judges, the highest and lowest point will be dropped.
  • For 3 judges, a maximum deviation score of 1 will be used.
Breaking ties

When breaking ties with three judges, the scores before maximum deviation are used.

When breaking ties with five or more judges, the dropped scores are used as well.

  1. Majority judges.
    • This is the majority of the total number of judges in the division; not based on score but rather on who the judge placed higher
  2. For five or more judges, total score of all judges.
  3. Re-run competitors. If possible, different judges will be used.
Five judges
Original scores
Judge 1 Judge 2 Judge 3 Judge 4 Judge 5 Total
A 3 2 3 3 1 8
B 5 3 4 1 4 11
C 1 5 1 4 3 8
D 2 1 5 5 2 9
E 4 4 2 2 5 10
F 6 6 6 6 6 18

The highest and lowest scores for each competitor have been dropped and the total score reflects this. The result is a tie for first and second between A and C.

Tie breaker for A & C
Judge 1 Judge 2 Judge 3 Judge 4 Judge 5 Majority of Judges
A 3 2 3 3 1 3
C 1 5 1 4 3 2

Judges 2, 4, and 5 gave their best score to A, so A wins because the majority of judges preferred A.

Final results:

  1. A
  2. C
  3. D
  4. E
  5. B
  6. F
Three judges
Original score is on top. The score after the maximum deviation is underneath.
Judge 1 Judge 2 Judge 3 Adjusted Score
A 1 3 4 9
2 3 4
B 5 1 3 9
4 2 3
C 6 4 1 12
5 4 3
D 2 6 5 15
4 6 5
E 3 2 6 9
3 2 4
F 4 5 2 12
4 5 3

In this example, there are two ties. One three way, and one two way.

Breaking the ties.
Judge 1 Judge 2 Judge 3
A 1 3 4
B 5 1 3 Majority
E 3 2 6
C 6 4 1 Majority
F 4 5 2

In the two way tie, the majority of the judges gave better scores to C. The tie was broken in favor of C.

In the three way tie, judges 2 and 3 gave the best scores to B, while judge 1 gave the best score to A. The three way tie is broken in the favor of A, but a new tie is created in the process.

Breaking the final tie.
Judge 1 Judge 2 Judge 3
A 1 3 4 Majority
E 3 2 6

In the final tie, the judges preferred A, so the tie is broken in favor of A.

Final results.

  1. B
  2. A
  3. E
  4. C
  5. F
  6. D

Order of Operations

  • Recordings are submitted.
  • Divisions are created from submissions.
  • Judges for the division are selected.
  • Judges receive recordings for their divisions.
  • Judges will submit their rankings to the score keeper.
  • The score keeper will calculate the scores.
    • if there are any ties, then the score keeper will attempt to break the ties with the permitted methods.
  • If there are any ties that can not be broken, the tied competitors will be judged again by different judges.
    • If no other judges are available, then the same judges may be reused.
  • Once all divisions are completed, then the results are released.


  • Recordings must be performed at the student's school.
  • Recordings must be exclusively made for the invitational.
    • Recordings from other tournaments/events are not allowed.
    • Recordings can not be older than one month.
      • If the invitational is in May, then competitors may begin recording in April.
  • Maximum recording length of two minutes.
    • Records over two minutes will not be accepted.
    • The beginning and end of the video may be trimmed to comply with the time limit.
  • The entire ring must be visible in the recording.
    • The competitor must be able to stand at any area of the ring with their entire body visible.
  • Recordings can not be hand held. It must be on a stable surface. Tripod use is preferred.
  • No coaching of any kind.
  • Video can not be muted.
  • No background noise or music.
  • Acceptable resolutions:
    • 1080p
    • 4K
  • Minimum frame rate of 30fps.
  • Orientation must be landscape.
  • No slow motion.
  • No speeding up.
  • No editing, other than trimming, is allowed.
  • A microphone may be used when presenting.
  • Each event must have separate recordings. (IE: you can not combine Traditional and Creative forms in the same video)
  • Recordings are to be uploaded to a 3rd party service: YouTube, iCloud, Dropbox, etc.
    • A link to each recording must be submitted with the signup form provided for the invitational.


  • Competitors must include the following information when they present themselves.
    • Name
    • School
    • For breaking: board sizes and amount at each station as well as the technique to be performed
    • For forms: the name of the form.
      • For team forms: the names of all competitors and team name.
    • For self defense: their partners name.
  • If the competitor is unable to present (IE: under 6 or mute), then their instructor or other black belt may present for them.
  • Maximum of 6 competitors per division.
    • If there are more than 6 competitors, then the division is divided into multiple sub-divisions.
    • When sub-dividing divisions, competitors will be spread out for balancing competition between schools.


School A: 4 competitors
School B: 3 competitors
School C: 2 competitors
Spreading out schools for balanced competition.
Sub-Division 1 Sub-Division 2
School A 2 2
School B 2 1
School C 1 1
  • Three breaking stations.
    • A station may only have one technique.
  • Recommended boards:
    • Century 10443 (8MM) - Thin
    • Century 10444 (12MM) - Medium
    • Century 10448 (18MM) - Large
  • Competitors are only allowed three attempts to break at a station. They must then move to the next station.
    • This is considered a no-break, even if the competitor breaks it on the fourth attempt.
  • All breaks must be visible to the judges. Any break not visible to the judges will be considered a no-break.
  • Stations may use either human board holders or concrete blocks.
    • Concrete blocks must be 16x8x8 inches.
  • Board holding machines are not allowed.
  • Breaking will be judged on the following criteria:
    • Amount of boards broken
    • Number of attempts to break
    • Difficulty
    • Technique
    • Balance
  • Competitors will have to decide under what judging standards they want to submit their recording.
    • Competitors may not submit the same recording for multiple events, IE: Traditional Forms and Creative Forms.
  • Solo and team forms must not leave the boundaries.
    • They can readjust their positioning.
    • If they step over the boundaries, it will be considered as incomplete and the competitor will be judged up to the moment where they left the boundary.
      • If the foot is on the boundary markers, they are considered to still be in the boundaries.
      • The foot has to be past the boundary marker to be considered out of bounds.
  • No music allowed.
  • Forms will be judged on the following criteria:
    • Technique
    • Stances
    • Strength
    • Balance
    • Degree of difficulty.
Traditional Forms
  • None of the following movements.
    • Cartwheels
    • Flips
    • Spins greater than 360 degrees
    • Splits
  • Traditional forms
Creative Forms
  • Any form can be used.
  • Costumes may be used.
  • Additional judging criteria:
    • Costume construction
Team Forms
  • 2-3 competitors.
  • Teams may be any mix of males and female competitors.
  • Teams can be mixed ages.
  • Teams can be mixed ranks.
    • Teams will be grouped based on the highest rank on the team. IE: 2 white belts and 1 black belt will be placed in the black belt group.
  • None of the following movements.
    • Cartwheels
    • Flips
    • Spins greater than 360 degrees
    • Splits
  • Traditional forms only.
Creative Team Forms
  • 2-3 competitors
  • Teams may be any mix of males and female competitors.
  • Teams can be mixed ages.
  • Any form can be used.
  • Costumes may be used.
  • Additional judging criteria:
    • Costume construction
Weapon Forms
  • Weapons must not be dropped.
  • If competing with a single weapon, the weapon can not be placed on the floor.
    • If dual wielding weapons, a single weapon may be placed on the floor.
      • If placing a weapon on the floor, the weapon must be gripped until the weapon makes contact with the floor, then it may be released.

Self Defense

  • Partner does not have to signed for self defense.
  • Partner does not present themselves.
  • Up to three different scenarios.
  • Submissions are judged on the following criteria:
    • Practicality
    • Effectiveness
    • Technique
    • Strength

Accepting Invitation

  • A school must be invited by the coordinators of the tournament in order to participate. Other participants may not invite others.
  • An accepting school must provide at least 1 black belt 1st Dan or above as a judge.
  • School instructor and judges must attend a seminar on these rules and regulations.
  • A sample recording, in accordance to these rules and regulations, must be provided to determine if the recording setup is suitable.
    • This sample may not be used as an entry in the invitational.


  • No music is allowed because this tournament will be streamed.