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.
A puzzle related to mathematical facts and objects, whose solution needs mathematical arguments. General mathematics questions are off-topic but can be asked on Mathematics Stack Exchange.
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 puzzle which incorporates a form of wordplay, such as puns, or which requires wordplay in order to find the solution.
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 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 problem or riddle written in rhyme for an artistic twist.
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.
dressed up as a story or a longer description of a situation.
A puzzle related to shapes, geometric objects (polygons, circles, solids, etc.) of any number of dimensions, the relative position of figures, and the properties of space. General geometry questions a…
A puzzle that involves numerical calculations, such as multiplication and addition.
A puzzle that asks for the pattern in a given number sequence.
A puzzle designed to be solved without using calculators, online decoders or computer programming. You're still allowed to use a computer to post the solution; Stack Exchange doesn't support smoke sig…
the study of counting discrete structures.
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. Use with the [logical-deduction] tag. For p…
A puzzle that uses images and/or text, where solving the puzzle requires examination of the components' attributes.
a methodological plan of action for realizing a specific goal.
A puzzle that requires finding hidden data in various media forms, such as text or images.
A puzzle related to chess. Questions about chess which aren't puzzles are off-topic and should be asked on Chess Stack Exchange.
A mathematical puzzle where you have to optimize a certain objective function (maximize profit, minimize cost).
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.…
A puzzle centered around geographical features, such as countries, continents, cities, mountains, rivers, and climate. Please do not use this tag to ask geography problems which aren't puzzles as they…
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…
Puzzles that crucially depend on some feature of the English language or that only work in an English formulation. General English questions are off-topic but can be asked on our sister sites English …
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] instea…
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 about forming numbers using other numbers and mathematical operations.
A mathematical puzzle whose essential nature involves randomness. Use with [mathematics]
presented in the form of any of the various types of poetry. General poetry questions are off-topic and should be asked on other Stack Exchange sites.
a puzzle consisting of a grid to be filled with symbols, such that each constraining unit contains each symbol exactly once. The typical example is a 9x9 square to be filled with the nu…
heavily based on the arithmetic properties of the integers. Use with [mathematics]
Puzzles that focus on getting information from truth-tellers (who never lie), liars (who always lie), and Jokers (who answer at random).