Rules library

Rules summaries for bracket planning

Select a sport and ruleset to see the planning notes that matter for bracket choice: competition system, low-number handling, repechage and where to verify the official rule text.

Sport

Ruleset

International Judo Federation

IJF Rules

Planning summary

International reference rules for IJF World Tour and ranking-point events.
Competition system depends on event type and athlete count per category.
Low-number categories use special systems: round robin for 3–5 athletes, modified brackets for 6–7.

Bracket notes

Senior World Tour events use full repechage: any athlete who lost to a finalist re-enters.
Continental Cups and some veteran events use double repechage.
Cadet, junior and youth events follow separate rulebooks — repechage scope may differ.

Official source

Planning a judo tournament?

All judo-specific tools, IJF rules summaries and planning guides in one place.

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Bracket format guide

Compare single elimination, repechage and round robin to choose the right format for your event.

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Match count estimator

Calculate match count, rounds and event duration for any ruleset. Free, no signup needed.

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