Heavenly Stem clashes: only four pairs, so check who's stronger, then what gets hit
A stem clash is two Heavenly Stems that sit at opposite compass points and control each other's element: Jia–Geng and Yi–Xin pit eastern Wood against western Metal, Bing–Ren and Ding–Gui southern Fire against northern Water. Wu and Ji are Earth, in the center with nothing opposite, so they don't clash. Underneath, a clash is still control, just more head-on. Who gets hurt, and how badly, depends on which side is in season and rooted in the branches.
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At a glance
| Clash | Elements | Usually hurts | Eased by | Restrained by |
|---|---|---|---|---|
| Jia–Geng | Metal controls Wood | Geng hurts Jia | Water (Ren, Gui) | Fire (Bing, Ding) |
| Yi–Xin | Metal controls Wood | Xin hurts Yi | Water (Ren, Gui) | Fire (Bing, Ding) |
| Bing–Ren | Water controls Fire | Ren hurts Bing | Wood (Jia, Yi) | Earth (Wu, Ji) |
| Ding–Gui | Water controls Fire | Gui hurts Ding | Wood (Jia, Yi) | Earth (Wu, Ji) |
- Not clashes
- Bing–Geng and Ding–Xin are Fire controlling Metal: control, not clash. Wu and Ji don't clash
- Check first
- Which side is in season and rooted in the branches
- Top and bottom
- Stems clash and their branches clash too (e.g. Jia Yin vs Geng Shen): the heaviest kind
- Favorability
- A favorable stem being hit is a loss; an unfavorable one being hit helps
Common view vs. our view
| Common view | Our view | Why |
|---|---|---|
| Any controlling stems count as a clash | Only Jia–Geng, Yi–Xin, Bing–Ren, Ding–Gui | Bing–Geng and Ding–Xin are plain control; Wu and Ji face nothing |
| Metal always beats Wood, Water always beats Fire | Check who's in season and rooted | In 30.2% of 912 clashes the side being hit is in season |
| Any clash is bad news | Clashing away an unfavorable stem helps | 30.2% of stems being hit are unfavorable |
| Nothing can be done about a clash | A bridge or a restraint eases it | 64.6% of clashes have a bridging or restraining stem in the chart |
Two real charts
Yi Wei · Xin Si · Jia Xu · Ren Shen (female, 13 May 1955, 16:00, Beijing)
Find the clash: Yi Wood on the year stem sits next to Xin Metal on the month stem, so Yi–Xin clash, with Xin hitting Yi.
Favorability: Jia Wood is born in a Si month with Fire in command, Wood feeding Fire and draining itself. We rate it weak (support 1.85, pressure 5.15): Wood (Peers) useful, Water favorable, Earth and Fire unfavorable. The Yi being hit is Rob Wealth to Jia, Wood, the useful element itself. A favorable stem under attack is a loss: the ally who could help the Day Master is pinned down by Direct Officer (Xin).
Strength: in a Si month, Xin Metal is controlled by Fire and out of season; Yi is out of season too. Neither side has much force, so the clash is mild. A bridge exists: Ren Water on the hour stem, Indirect Resource, links Metal to Wood. But it's on the hour, far from the year and month, so it only helps partly. Reading: in early life, peers who could help tend to be held back by rules and elders. Water cycles and Water years fill in the bridge and loosen the clash; Geng or Xin Metal cycles tighten it.
Ren Zi · Bing Wu · Wu Zi · Wu Wu (female, 26 Jun 1972, 12:00, Beijing)
Find the clash: year pillar Ren Zi against month pillar Bing Wu. Bing–Ren clash above, Zi–Wu below, a top-and-bottom clash. Between the day pillar Wu Zi and hour pillar Wu Wu, Zi–Wu clash again.
Wu Earth born in a Wu month, Fire and Earth everywhere. We rate it strong (support 5, pressure 2): Water (Wealth) useful, Wood and Metal favorable, Fire unfavorable. The Bing being hit is Indirect Resource and unfavorable, so hitting it helps; Ren, doing the hitting, is the Useful God.
It won't be clean, though. Bing is born in a Wu month, in season and rooted, so it can hit back; Ren relies on two Zi branches and is hemmed in by two Wu Earth stems. Water and Fire seesaw: the unfavorable element is tied up, but the useful one is worn down too. Wood, a favorable, is exactly the bridge between Water and Fire, so Wood cycles and years calm it; Metal feeding Water tilts the fight toward the useful side.
Why only these four?
A clash needs two things: control between the elements, and opposite directions. Wood is east and Metal west; Fire is south and Water north. So Jia–Geng, Yi–Xin, Bing–Ren and Ding–Gui clash, and each pair shares polarity (yang with yang, yin with yin): a straight collision.
Bing–Geng and Ding–Xin are also Fire controlling Metal, but south and west aren't opposite, so that's plain control. Wu and Ji are Earth, central, with nothing facing them. Some lists add pairs like Jia–Wu or Yi–Ji to reach six or eight “clashes”. We only count these four and treat everything else as ordinary control.
Who clashes whom? Metal doesn't always beat Wood
Normally Metal hits Wood and Water hits Fire, but a side that's in season and rooted can hit back. Jia–Geng in a spring chart with Yin or Mao in the branches: Jia is at full strength and Geng may not win. Across the 912 stem clashes we counted, the side being hit (Wood or Fire) was in season 30.2% of the time; the hitting side (Metal or Water) 39.9%.
So don't say “Jia is wrecked” the moment you see Jia and Geng. Look at which side the month supports and whether each has roots below; the stronger one is the one that actually lands the blow.
When the branches clash too
If the stems clash and the branches under them clash as well, it's a top-and-bottom clash, the most severe kind. Jia Yin facing Geng Shen: Jia–Geng above, Yin–Shen below, fast and hard. 16.8% of the 912 stem clashes were like this, 7.3% of all charts.
There's also a crossed version: Jia on Shen, Geng on Yin, each sitting on a branch that helps the other. That one drags on, back and forth. If the helping branches sit elsewhere in the chart rather than under the stems, the clash is slower. Two stems bumping on their own are the easiest to settle; branch backing makes it much harder.
Easing a clash: bridge it or restrain it
There are two ways out: a character that links both sides, or one that holds the attacker back. In Jia–Geng, Ren or Gui Water turns the clash into a flow: Metal feeds Water, Water feeds Wood. Bing or Ding Fire controls Geng so it can't reach Jia. Bing–Ren works the same way, with Wood as the bridge and Earth as the restraint.
In our charts, a bridging stem was present for 34.5% of clashes and a restraining one for 38.7%; at least one for 64.6%. Most stem clashes have an answer. The ones worth watching are those with neither, hitting a favorable stem.
Favorable stems fear clashes; unfavorable ones welcome them
Clash away a favorable stem and you lose something; clash away an unfavorable one and you're helped. The stem being hit was favorable 55.4% of the time and unfavorable 30.2%. That decides whether a clash is good or bad far more than the clash itself.
Position matters too. Between year and month it's usually read as friction in early life and family; a clash on the day stem, the Day Master itself, happened in 20.7% of charts and touches your own state and choices; between day and hour it relates more to work and later life. These are broad images, not events to match one by one.
Data: how common stem clashes are, and whether they're resolved
36.0% of charts (720) have a natal stem clash, 912 pairs in all. Ding–Gui 259, Jia–Geng 256, Yi–Xin 203, Bing–Ren 194. The clashing stems sit side by side in 21.1% of charts; the day stem is involved in 20.7%.
The side being hit was in season 30.2% of the time, the hitting side 39.9%. A bridging stem was present 34.5% of the time, a restraining one 38.7%, at least one 64.6%.
16.8% of clashes had the branches below clashing too (7.3% of charts). The stem being hit was favorable 55.4% of the time and unfavorable 30.2%.
Statistics: 2,000 birth times (birth years 1950–2010 uniformly random, random birth time, half male/half female, Beijing true solar time). Only Jia–Geng, Yi–Xin, Bing–Ren and Ding–Gui count; all four stems were checked pairwise, so a chart can have more than one. “In season” means the stem's element matches, or is produced by, the month branch's main qi. Bridging and restraining stems were looked for among the other two stems only.
Common mistakes
- A stem clash means a car accident or surgery: a clash is two forces in conflict; actual events depend on favorability and luck, not a fixed mapping to accidents.
- In Jia–Geng, Jia always loses: the side being hit is in season 30.2% of the time, and in season with roots it can hit back.
- Bing–Geng or Wu–Jia also clash: only Jia–Geng, Yi–Xin, Bing–Ren and Ding–Gui; everything else is ordinary control.
FAQ
I'm a Jia Wood Day Master with Geng in my chart. Am I doomed to a rough life?
No. Geng is Seven Killings to Jia, and a clash on the day stem shows up in 20.7% of charts; it's common. Check strength first: in a strong chart Geng is often the Useful God and the clash works like a whetstone; in a weak one, look for Water to bridge and Fire to restrain Geng. How life goes also depends on luck cycles, not one clash.
What if the year's stem clashes my day stem, like 2027 Ding Wei for a Gui Water Day Master?
In 2027 the year stem is Ding, so a Gui Day Master meets a Ding–Gui clash, this time with you as the one doing the hitting. Ding Fire is Indirect Wealth to Gui. If you're strong, Fire is favorable and the year usually brings more opportunities and more going on; if you're weak, Fire is unfavorable and it's busier and costlier. Treat it as a faster tempo and plan around your favorables.
My partner and I have clashing day stems (Jia and Geng). Are we incompatible?
Clashing day stems mean your ideas and ways of doing things tend to collide head-on; they don't rule a relationship out. Compatibility depends on whether your favorables complement each other and on the spouse palace and spouse star, which the compatibility page looks at together. Plenty of couples with this clash get along by talking disagreements through.
Which is worse, a stem clash or a branch clash?
Pair for pair, a branch clash is usually heavier, because branches hide several stems and a clash stirs them all; two stems colliding are easy to bridge or restrain. Worst is a top-and-bottom clash, stems and branches together, like Jia Yin against Geng Shen, in 7.3% of our charts.