Chaldduk guide — reading compatibility with Saju and MBTI
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What this app does
Chaldduk puts a Saju chart from birth date and time next to an MBTI type. The Saju side scores relationships that show up often in Four Pillars work — day master, ten gods, combinations and clashes. The MBTI side adds how each of the 16 types tends to talk and where friction usually sits. It does not collapse two people into one yes-or-no line. It splits where they tend to fit and where they tend to miss.
Daily fortune and the time-of-day (sijin) notes use the same day master. Change the date and the copy changes. It runs in the browser with no account.
What you enter
- Birth date and time. If the hour is unknown, the hour pillar is left empty and the day, month, and year do more of the work.
- Four-letter MBTI. If you do not know yours, a short in-app quiz can pick an approximate type. It is not a certified inventory.
- Compatibility needs two people. Daily fortune works with one.
How to read the score
The score mixes how the ten gods generate or control each other with how many stem/branch combinations and clashes sit in the two charts. A high number is not “no conflict.” More combinations usually mean it is easier to stick; more clashes usually mean shorter conversations. Matching MBTI letters (E/I, S/N, T/F, J/P) tends to make the tone easy; opposite letters change the temperature even when the Saju looks friendly.
Keep it as play
Saju work usually sits on a full natal chart plus luck cycles. MBTI is one personality model. This page overlays the two to write a short note. Do not hand marriage, jobs, or health to the score. If the birth hour is unsure, leaving it blank is better than guessing.
When people actually open it
Most visits are a glance at today’s fortune before leaving the house. The day master is already stored, so the copy changes when the date does. The time-of-day note is a temperature check for the next couple of hours. Do not move a meeting because of it. Treat it as a one-line mood for the day.
People also punch in two profiles before a first meeting. A high score is not a green light. The weaker axes show where a talk tends to stall. A T/F split changes the temperature of advice; a clash in the pillars often means shorter sentences. Most readers use it only to pick a safer topic.
Some people know their MBTI and have never seen a Saju chart. They check the day master and leave. If the hanja gets in the way, read the score and the type’s tone and skip the ten-god names. Readers who already know Four Pillars often look only at combinations and clashes. The page still works if one side is empty-ish.
FAQ
The same questions arrive by mail. We will not make a life decision for you. What follows is the actual scope of the tool.
Is this a professional reading?
No. It overlays a day master, ten gods, combinations, and four MBTI letters into a short note. It is not a natal-chart reading, it does not walk luck cycles, and it does not keep a history. Read it as play. Make the real call with people, not with the score.
What if I do not know the birth hour?
Leave the hour pillar blank. Guessing a time is worse. Some charts flip the ten gods when the hour changes. Date alone is enough for the broad daily note and the main compatibility axes. Add the hour later if you find it.
Do you keep the birth data?
It runs in the browser with no account. We do not store compatibility or fortune results as a server-side profile. The device may keep recent inputs locally. On a shared computer, clear the browser data when you are done.
Is it free? Is there adult content?
It is a free browser tool. Compatibility copy stays on conversation and the temperature of a relationship. There is no adult-only track. Ads may appear.