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How a Qimen Hour Chart Is Calculated

A Qimen hour chart is a deterministic transformation of one wall-clock moment under a declared school configuration. The calculation freezes time and offset,…

Names and related terms
Qimen casting · hour Qimen calculation

Catalog reference updated: · Maintained by OpenFate · Editorial Methodology

Overview

A Qimen hour chart is a deterministic transformation of one wall-clock moment under a declared school configuration. The calculation freezes time and offset, derives calendrical anchors, builds the earth plate, and then places the rotating layers and conditions. The declared OpenFate pipeline is: moment and UTC offset; four pillars with 23:00 day rollover; exact solar term; Yin or Yang Dun; Chaibu Yuan and bureau; Xun head and hidden instrument; earth plate; Chief and duty gate; star, stem, gate, and deity placement; then derived conditions.

At a glance

Page role
Reproducible calculation rule
Terms covered
Qimen casting · hour Qimen calculation
Verification focus
The declared OpenFate pipeline is: moment and UTC offset; four pillars with 23:00 day rollover; exact solar term; Yin or Yang Dun; Chaibu Yuan and bureau; Xun head and hidden instrument; earth plate; Chief and duty gate; star, stem, gate, and deity placement; then derived conditions.
Stop rule
A calculated chart is valid only for its declared inputs and method. Do not claim compatibility across schools, historical periods, or software versions without exact fixtures and field-by-field comparison.

Explore concepts

Direct answer and scope

A Qimen hour chart is a deterministic transformation of one wall-clock moment under a declared school configuration. The calculation freezes time and offset, derives calendrical anchors, builds the earth plate, and then places the rotating layers and conditions.

  • Names and related terms: Qimen casting
  • Names and related terms: hour Qimen calculation

How the rule is formed or checked

The declared OpenFate pipeline is: moment and UTC offset; four pillars with 23:00 day rollover; exact solar term; Yin or Yang Dun; Chaibu Yuan and bureau; Xun head and hidden instrument; earth plate; Chief and duty gate; star, stem, gate, and deity placement; then derived conditions.

Keep the cast moment, UTC offset, method version, palace, and interacting symbols visible before adopting an interpretation.

How to use this in a reading

Verify the earliest differing step when two engines disagree. A later palace mismatch may originate in time normalization, the solar-term boundary, Yuan selection, ring direction, or center escort rather than the visible symbol itself.

  • 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

If every later layer shifts but the four pillars already differ, debugging the gate sequence first wastes time. If pillars and bureau match but only Tian Qin differs, compare the center rule rather than the calendar.

Common mistake and limit

A calculated chart is valid only for its declared inputs and method. Do not claim compatibility across schools, historical periods, or software versions without exact fixtures and field-by-field comparison.

Sources and editorial basis

  1. 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.
  2. 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.
  3. OpenFate Qimen hour-chart method
    OpenFate 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.

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