How the calendar method sets the board
Chai bu uses the solar term and the hour to decide whether the board is yang or yin, and which number it is. A different method can produce a different number. Read which method the chart names first.
Editorial review: 2026-09-22 · Reviewed by fateshow · Editorial method
How the solar term and the hour set the number
The year is split by solar terms, and each stretch has a traditional board number. The hour then decides which board this clock-hour falls on, and how the lead star and lead door turn. “What time is it” is not enough. You also need the solar term and whether chai bu is the method. The number is a label. A larger number is not a better matter.
Align the method before comparing two boards
When two Qi Men boards are compared, align three things: the method, the hour, and the question. If one of the three differs, it is not the same board. This site explains the method the live tool declares. A verse that never entered the engine is not described as already in use. Chai bu is also not a Zi Wei calculation.
Where to stop when the numbers differ
Illustration: within one hour, board A says chai bu, yang dun, board three. Board B uses another method and a different number. Doors and stars can then sit in different palaces. Write down both method names before you compare doors. Do not judge which board is luckier from how large the number is. You are also not comparing two people’s fates.
Common mistakes
- Judging luck from how large the board number is.
- Comparing doors across two methods.
- Describing a verse the engine never used as if it were already in the tool.
Use it in fateshow
Qi Men Dun Jia
A nine-palace board cast from the moment, read by useful god, palace and direction
Open tool →Frequently asked questions
Are chai bu and the leap-term method the same?
No. They are different ways to set the board. Read the one named on the chart. Do not add the one that is not named.
Are yang dun and yin dun lucky and unlucky?
They are the board’s direction, forward or back. They are not good and bad.
Which board is used in the hour a solar term changes?
The board the tool casts from the term’s actual time. Do not move the boundary onto the board that sounds kinder.
Sources and editorial basis
- 1. fateshow chart rule snapshot
Each generated report stores the engine settings that produced it. Compare those settings before treating two charts as the same calculation.
- 2. fateshow interpretation dictionary
Plain-language tendencies used in reports. They describe conditions and cautions, not fixed personality or inevitable outcomes.