一口咬掉牛尾巴 — "one mouth bites off the ox's tail".
Take 牛, the character for ox. Bite off its tail — the vertical stroke that runs out below the last horizontal. Put the 口, the mouth, underneath what is left. You have written 告.
That is a 字謎, a character riddle, solved. The answer is one Chinese character, and you got there not by thinking about oxen, but by treating the clue as instructions for taking a character apart and reassembling it. Nearly every riddle works this way.
The clue, the marker and the answer
A riddle has three named parts, and knowing which one is missing tells you what kind of work you are being asked to do.
- 謎面, the face — the clue itself, the line you are given.
- 謎目, the marker — what category the answer belongs to. For the riddles here it is always the same: one character. In a festival riddle it might be a place name, a line of poetry or a medicine.
- 謎底, the bottom — the answer.
The single most useful expectation to carry into a character riddle is that the answer is exactly one character, which bounds the problem hard. You are not looking for a word or an idea. You are looking for something you could write in one square.
The second expectation is that the clue describes parts. 十張口，一顆心 — "ten mouths, one heart" — is not a metaphor about unanimity. Ten is 十, mouth is 口, and 十 inside 口 makes 田; put 田 over 心 and you have written 思, to think.
Six moves, and the words that give them away
Almost all of it is one move with variations. We worked through every riddle in our own set by hand and classified them: 77 of 88 — 88 per cent — were 離合, taking a character apart and putting the pieces back differently. Only 8 were pure 會意, solving by sense alone, and 3 were pictorial. If you learn to dismantle, you can solve nine riddles in ten.
| Move | What it does | The tell | Example |
|---|---|---|---|
| 離合 combination | name two or more components, assemble them | two nouns that are also characters, and a position word | 王先生白小姐坐在石頭上 → 王 + 白 over 石 → 碧 |
| 增損 add or subtract | add or remove strokes from a named character | a number, or "add", "drop", "bite off" | 人有它則變大 → what turns 人 into 大? → 一 |
| 半面 half | take part of a named character | the word "half", or "the front part of" | 「明」字的前一半 → 日 |
| 包含 containment | put one component inside a frame | "inside", and usually 門 or 口 | 門裡有個馬 → 闖 |
| 疊字 stacking | repeat one component two or three times | a repeated phrase, or a multiple | 七十二小時 = three days = 日日日 → 晶 |
| 會意 by sense | describe the thing the character means | no components named at all | 畫時圓，寫時方，冬時短，夏時長 → 日 |
The frame riddles are the easiest entry point. Once you see the pattern, you can solve a whole run of them: 門裡有個人 is 閃, 門裡有個日 is 間, 門裡有個口 is 問. If you have never solved one before, start there.
A procedure for a riddle you have never seen
When the clue does not fall apart on sight, work it in this order.
- Fix the size of the answer. One character, unless the marker says otherwise.
- List every component the clue names outright. Nouns that are themselves characters — 口, 心, 日, 木, 門, 馬 — and numbers, which are characters too: 一, 十.
- Look for a word that has to be re-written before it is useful. This is the step people miss. Some words in a clue are not components; they are senses that you must first express as a character, and then use.
- Look for a direction. On, under, inside, beside, half, before, after — these place the pieces.
- Assemble, then check backwards. Does every word in the clue do a job? Does anything in your answer have no basis in the clue? A good riddle accounts for both.
Step 3 is the art of the riddle. The earliest well-documented example is also the most elegant. A fifth-century collection of anecdotes records 楊修 reading an inscription on 曹娥's memorial stele and explaining eight characters that had baffled the party he was travelling with. His working is given verbatim, and it is four applications of step 3 in a row: 黃絹, yellow silk, is coloured thread — 色絲 — which written together is 絕; 幼婦, a young woman, is 少女, which is 妙; 外孫, a daughter's child, is 女子, which is 好; 齏臼, the mortar that receives pungent things, is 受辛, which is 辤. Absolutely marvellous words — 絕妙好辤.
Not one of those four steps is about the pieces of the phrase you are given. Each one asks you to understand the phrase, say what it means in different words, and then notice that those words are a character. That is the move that separates a riddle you can grind out from one you have to see.
Whether the riddle is any good
Riddles have named faults. It helps to know them, because many riddles circulating online are broken in one of these ways.
- 犯面, also called 露春 — the clue and the answer share a character. The clue has printed its own answer, and the riddle is disqualified.
- 拋荒 — the clue contains words the answer never accounts for. Decoration masquerading as instruction.
- 踏空 — the answer contains material the clue never supplied. You could not have got there.
- Genuine ambiguity. "Add one stroke" clues are the usual offenders. We counted the everyday characters that contain 口 and have exactly two more strokes, using a published decomposition database: there are at least 26 of them — 兄 加 占 古 句 另 只 叫 召 可 台 右 号 石 and a dozen more. A clue like 口字加兩筆 has no unique answer, and the method under-counts, because characters like 田 are treated as atomic and never even appear in the list.
We applied all of that to our own set, which is the part of this guide only we can write. Working all 88 riddles the tool then carried by hand, and cross-checking three ways, 30 of them — 34 per cent — carried a defect: 10 had an explanation that did not work, 8 had a wrong answer, 5 were genuinely ambiguous, 4 required material the clue never gave, and 3 printed their own answer. Fifteen were removed outright and the rest corrected; the tool now carries 73.
Two of those cross-checks were machine checks, not just judgement. Every composition claim in the explanations was tested against a published character-decomposition database of 88,937 characters: of 128 claims, 8 were unsupported, across 7 riddles — six of which were exactly the ones the hand pass had already flagged, and the seventh was a deliberate negation (雙木非林, "two trees, yet not 林"). And 18 of our clues appear word for word in a published academic collection of 18,420 riddles; 15 agreed with our answer and 3 did not — and in all three the collection was right and we were wrong.
| Clue | We said | The collection says | Why it is right |
|---|---|---|---|
| 水邊人家 | 汁 | 沪 | 人家 is a household, 戶; 水邊 is the water radical → 沪 |
| 日落西山 | 岱 | 岁 | 日落 leaves 夕; 西山 is 山; 山 over 夕 → 岁 |
| 上下一條心 | 忐 | 卡 | 上 over 下 → 卡 |
All three of those answers only work in simplified characters. A riddle can be sound in one script and nonsense in the other. If you are stuck on a riddle that seems to have no answer, try writing the pieces in the other script. Our variant character lookup and radical lookup are both useful here, and our guide to taking a character apart with Cangjie covers the mechanical version of decomposition — where an input method throws material away by a fixed rule, which is the opposite of what a riddle does.
Lanterns are Song; the riddles are older
The definition everyone quotes is from 劉勰's 《文心雕龍》, written around 500 CE, and it already contains the division this guide rests on: a riddle either 體目文字, works on the written character, or 圖象品物, pictures an object. The character riddle was recognised as its own kind fifteen hundred years ago.
The lantern came much later. 周密's 《武林舊事》, describing the lantern nights of Southern Song Lin'an, has silk lanterns with verses cut into them, hidden-head riddles and capital slang, written to tease people walking past. The practice of riddling is ancient; the lantern is a Song-dynasty stage for it.
The living tradition is formally recognised. Riddles are item Ⅰ-31 on China's national intangible cultural heritage list, under folk literature — first listed in 2006 for 青林寺 in Hubei, and extended in 2008 to the lantern riddles of Chenghai in Shantou, Guangdong, whose tradition keeps the Song practice of beating a drum as the riddle is guessed. You may have read that UNESCO recognises lantern riddles; it does not. China's 2024 inscription on UNESCO's representative list is for Spring Festival social practices as a whole, and its description names cleaning, food, offerings, greetings and decorations — not riddles.
One last caution, because it is the most widely repeated line in this whole subject. 止戈為武 — "stop the weapons, that is 武" — is a real quotation, from a speech by King Zhuang of Chu recorded in the 左傳, and it is a moral reading rather than an account of the character. Palaeographers normally read 武 as a foot beside a weapon: to advance under arms, which is the opposite sense. Quote it as the saying it is; it is not what the graph means, and it is not a riddle.
When you want to try some, our riddle collection now holds 73, each with its working shown. The 門-frame run and the stacking riddles are the gentlest way in.
The definition is quoted from the Wikisource transcription of 《文心雕龍·諧讔》, the 楊修 working from 《世說新語·捷悟》, the lantern description from 《武林舊事》卷二 and the 止戈為武 passage from 《左傳·宣公十二年》, all read on 24 September 2026. The heritage metadata is from China's official intangible-heritage register and the Spring Festival element description is UNESCO's own. The 88-riddle audit, the ambiguity count and the comparisons against the published collection and the decomposition database are ours, done before the corrections were applied — which is why the figures describe 88 riddles and the tool now carries 73. We have said what we found in our own set; we have not audited anyone else's.
