A tag is a keyword or label that categorizes your question with other, similar questions. Using the right tags makes it easier for others to find and answer your question.
A riddle gives indirect clues about an unnamed object or concept to be identified. It is often presented in the form of a poem. Do not use this just to mean a difficult problem or puzzle.
A puzzle strongly related to mathematical facts and objects, or whose solution needs serious mathematical arguments. General mathematics questions are off-topic but can be asked on Mathematics Stack E…
A puzzle that requires formal logical deduction to arrive at the solution. This suggests more than merely reasoning through clues to find an answer (you might want [situation] for that).
A puzzle whose answer will be a word or a set of words but not a phrase, sentence or sentences.
A puzzle whose solution relies on external sources such as tables, dictionaries, Wikipedia, or specifics that may not be common knowledge.
A form of wit in which the used words become the main subject of the work, primarily for the purpose of intended effect or amusement.
Puzzles where the genre or solving strategy of the puzzle is not explicitly stated; puzzles where the puzzler must deduce what type of puzzle it is.
a simple method of modifying messages to make them unreadable, but still possible to recover. Common ciphers are Caesar, Vigenere, Atbash, and several types of substitution cipher. Other c…
A puzzle in which you spot the pattern that links a set of given data items (like numbers, letters, music tunes). Usually, you use your insights into the pattern to find one or more new elements of th…
A problem or riddle written in rhyme for an artistic twist.
A puzzle that incorporates a visual component like pictures, diagrams, drawings, etc. Do not use this tag for puzzles that discuss geometric objects without displaying them.
A puzzle solved through an indirect and creative approach, using reasoning that is not immediately obvious and involving ideas that may not be obtainable only using logic.
A puzzle that involves numerical calculations, such as multiplication and addition.
A puzzle related to shapes, geometric objects (polygons, circles, solids, etc.) of any number of dimensions, relative position of figures, and the properties of space.
A puzzle that asks for the pattern in a given number sequence.
portrayed using images and/or text, where solving the puzzle requires examination of the components' attributes (for instance, word position or color) or meanings (for instance, the n…
A puzzle designed to be solved without using calculators, online decoders or computer programming.
A puzzle based on combinatorial mathematics, which is the study of finite or countable discrete structures.
a methodological plan of action for realizing a specific goal.
Hidden data concealed in otherwise unsuspicious pictures, text, and/or audio.
A puzzle related to the game of chess. Questions about chess which aren't puzzles are off-topic but can be asked on Chess Stack Exchange.
Puzzles such as Sudoku or Kakuro, where the final state of a pre-existing grid must be deduced logically through clues placed within and/or around the grid. For puzzles where you are given a list of c…
A puzzle that heavily depends on linguistic features; for instance it may concern foreign languages, or only work in some particular language, or be built around a peculiarity of the English language.…
Puzzles that crucially depend on some feature of the English language or that only work in an English formulation.
A tag for puzzles dependent upon some degree of computer literacy - for instance, requiring basic familiarity with operating system usage, encryption or programming.
For puzzles which ask the solver to determine a hidden property of certain words (or phrases), given a set of words with that property and usually also a set of words without it for comparison. Puzzle…
A puzzle centered around geographical features, such as countries, continents, cities, mountains, rivers, and climate.
For puzzles about forming numbers using other numbers and mathematical operations.
A mathematical puzzle whose essential nature involves randomness.
A mathematical puzzle where you have to optimize a certain objective function (maximize profit, minimize cost).
A puzzle that involves cryptic clues of the type found in cryptic crosswords, but is not a cryptic crossword. **Do not** use this tag for puzzles that are stated cryptically; use [enigmatic-puzzle] in…
Puzzles that focus on getting information from truth-tellers (who never lie), liars (who always lie), and Jokers (who answer at random).
heavily based on the arithmetic properties of the integers. General number theory questions are off-topic but can be asked on Mathematics Stack Exchange.