Chaibu vs Zhirun in Qimen: Different Yuan Methods
Chaibu and Zhirun are different ways of assigning Upper, Middle, and Lower Yuan around solar-term transitions. OpenFate currently uses Chaibu and records the…
Overview
Chaibu and Zhirun are different ways of assigning Upper, Middle, and Lower Yuan around solar-term transitions. OpenFate currently uses Chaibu and records the day leader Fu Tou; Zhirun is not silently substituted. A comparison must hold the cast instant, offset, pillars, solar term, plate method, and center rule constant, then change only the Yuan method. Compare the selected Yuan, bureau, earth plate, and every downstream placement.
At a glance
- Page role
- System-boundary comparison
- Terms covered
- Chaibu method · Zhirun method
- Verification focus
- A comparison must hold the cast instant, offset, pillars, solar term, plate method, and center rule constant, then change only the Yuan method. Compare the selected Yuan, bureau, earth plate, and every downstream placement.
- Stop rule
- Do not call one method universally correct without a stated lineage and validation target. Product documentation must say which method it implements and preserve old reports under their original version.
Direct answer and scope
Chaibu and Zhirun are different ways of assigning Upper, Middle, and Lower Yuan around solar-term transitions. OpenFate currently uses Chaibu and records the day leader Fu Tou; Zhirun is not silently substituted.
- Names and related terms: Chaibu method
- Names and related terms: Zhirun method
How the rule is formed or checked
A comparison must hold the cast instant, offset, pillars, solar term, plate method, and center rule constant, then change only the Yuan method. Compare the selected Yuan, bureau, earth plate, and every downstream placement.
Keep the cast moment, UTC offset, method version, palace, and interacting symbols visible before adopting an interpretation.
How to use this in a reading
If the methods produce different boards, report both method names rather than blending interpretations. A practitioner preference is a lineage choice, not evidence that the other board was calculated incompetently.
- Name the visible chart fact before assigning symbolic meaning.
- Compare the asker and matter anchors with every layer in their palaces.
- Record at least one supporting condition and one counter-signal.
- End with a reversible action and an observable review point.
Worked contrast
Near a solar-term transition, Chaibu may continue one Yuan assignment while a Zhirun table inserts or adjusts a segment. The resulting bureau difference is expected method behavior, not random instability.
Common mistake and limit
Do not call one method universally correct without a stated lineage and validation target. Product documentation must say which method it implements and preserve old reports under their original version.
Sources and editorial basis
- 猪野毅「奇門遁甲の基礎的研究」Abstract and pp. 161–185: history and vocabulary; nine palaces; Three Wonders and Six Instruments; Eight Gates, Nine Stars, and deities; 排宮 and 飛宮 method distinction.A 2010 Hokkaido University research article used for historical vocabulary, the basic board structure, and the documented distinction between rotating-palace and flying-palace approaches. It does not test predictive accuracy.
- NCC-T06 奇門遁甲專業版操作手冊NCC-T06 manual setting and board-field sections: configurable plate, center, bureau, deity, and day-boundary axes; used as evidence of modern method variation only.A modern professional-software manual used to document that plate, center, bureau, deity, and day-boundary settings vary. It is evidence of configurable practice, not an independent historical authority or accuracy study.
- OpenFate Qimen hour-chart methodOpenFate docs/QIMEN_SYSTEM.md, “Professional calculation contract,” “Interpretation and evidence contract,” and “Rule-source map,” source-reviewed 2026-09-12.Product-specific reference for OpenFate’s fixed-offset civil-time, hour-Qimen, rotating-plate, Chaibu implementation and its deterministic chart fields. A source review on 2026-09-12 does not prove live deployment, other schools, or predictive validity.