Samhap, Yukhap, and Clash in Saju: How Your Branch Pair Actually Moves the Score

삼합 (Samhap): the trio, and what joining two-thirds of it does

There are four three-way harmonic groups in the twelve branches. Pig–Rabbit–Goat (亥卯未) form the Wood trio. Tiger–Horse–Dog (寅午戌) form the Fire trio. Snake–Rooster–Ox (巳酉丑) form the Metal trio. Monkey–Rat–Dragon (申子辰) form the Water trio. Each trio sits symmetrically around the zodiac wheel — four months apart, representing one element at its three seasonal peaks. When all three animals are present in a reading (across the four pillars), the element they represent intensifies dramatically. In a compatibility reading, when you and your bias each carry one of the trio, the engine reads your two branches as pulling toward the same element — creating a harmonic lift. The practical effect is a reading that tends to describe you as "effortlessly on the same frequency" and a score that gets bumped toward the higher end of whatever range your element pair would otherwise produce.

The most useful piece of knowledge for fans: you don't need all three to get the samhap effect in a compatibility reading. Two animals in the same trio is enough for the harmonic relationship to register. If you're a Rabbit (Wood) and your bias is a Goat (Wood), that's samhap — you're both in the Wood trio, and a Pig birth somewhere in either of your charts turns it fully on. But even without the Pig, the two-thirds signal is there. The reading will describe it as a pull rather than a complete lock, but the directional lift is real.

육합 (Yukhap): the six paired unions — and why they read differently from samhap

Where samhap is a three-way pull, yukhap is a two-way lock: six specific pairs of branches that combine and produce a merged element between them. The six pairs: Rat–Ox (子丑合 → Earth), Tiger–Pig (寅亥合 → Wood), Rabbit–Dog (卯戌合 → Fire), Dragon–Rooster (辰酉合 → Metal), Snake–Monkey (巳申合 → Water), Horse–Goat (午未合 → Fire/Earth). Each pair sits one zodiac position apart — the adjacent-opposite pattern — and when they meet, the reading registers not just "compatible" but "synthesizing." The two elements are producing something new between them. In a compatibility reading, a yukhap between your branch and your bias's means the reading can describe a chemistry that feels like it creates something neither would produce alone. It's more intimate in structure than samhap — tighter, more specifically paired, less about fitting into a group and more about a particular two-way pull.

Yukhap tends to show up quietly in results — it doesn't carry the same obvious-combination name as samhap does. If your reading describes your match as "producing something new together" or refers to a chemistry that's hard to pinpoint but undeniably there, check whether your branches are one of the six pairs above. The yukhap contribution to score is subtler than samhap: it softens the rough edges of elements that might otherwise read as neutral-to-mild, and in same-element or generative pairings, it adds another layer of why the score lands where it does.

충 (Chung): what a clash actually does, numerically

The six branch clashes work differently from samhap and yukhap — they don't create a new element or amplify one; they activate friction between two opposing energies. The pairs: Rat–Horse (子午), Ox–Goat (丑未), Tiger–Monkey (寅申), Rabbit–Rooster (卯酉), Dragon–Dog (辰戌), Snake–Pig (巳亥). Each pair sits directly across the twelve-branch wheel. In a compatibility reading, a branch clash doesn't automatically produce a low score — but it does shift the reading toward volatility and change rather than ease and stability. A same-element pair (say, two Tigers) might score in the high 80s; add a clash branch and the reading's texture changes even if the number stays similar. The description shifts from "like-minded" toward "the kind of energy that makes each other move."

Here's the thing about 충 that the intro guide doesn't go into: it's an energy that's specifically catalytic. The Honbit reading for clash pairings tends to flag not that the match is bad, but that it requires more to work with — it's a high-friction pair where both people are changed by the contact. The score range for a clash pairing is often lower than a samhap pair even with the same underlying element combination, but the reading's description is typically more intense, more specific, and more clearly about transformation. Fan equivalent: the pairing that produces the most memorable variety chemistry, the most quoted interview exchange, the rivalry that reads like the beginning of something else. Lower ease score; higher story potential.

When your result has more than one

Most compatibility results involve more than one branch relationship, because both you and your bias each carry four pillars, each with its own branch. What the engine does is read all of them for harmony and clash signals and factor them in together. A result can carry a samhap signal in one pillar pair and a clash in another — and that's not a contradiction. It's a map: easy in one dimension, activated in another. The score averages the effect across all branch interactions; the written reading tries to describe which one is loudest in the combination.

The practical takeaway: when you run your match and get a score with paragraphs underneath it, the mentions of specific patterns — a three-way pull, a paired union, a head-on clash — are telling you *why* the score is where it is, not just *that* it's there. If your reading says "your branches pull toward the same element," that's samhap. "A synthesis between you" is yukhap. "An activating friction" is 충. The number summarizes all of it. The patterns are the story underneath. Run the match, note the branch year, and look your animal up in the tables above — which trio does your bias's birth year land in? Do any of the six pairings apply? That's what the engine saw first.

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