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.
Puzzles that revolve around a magic trick, or an illusion of sorts. Do not use this tag for a puzzle revolving around something as "witchcraft".
Puzzles involving cellular automatons in a 2D or 3D grid.
For puzzles about using keys to open locks and doors.
Puzzles centered around tic-tac-toe (a.k.a. noughts and crosses).
Speedsolving typically refers to solving a physical puzzle as quickly as possible. For instance, one might use this tag when asking about optimal Rubik's cube algorithms. This tag is not necessarily l…
For puzzles that involve a famous quotation.
A question about assessing or adjusting the difficulty level of a puzzle.
For questions related to the puzzle of islanders who can only leave when they deduce the colour of their own eyes.
For puzzles of the form "What do these three words have in common?"
In a 'blackboard puzzle' a set of numbers is transformed according to certain rules.
A Bongard problem usually consists of two sets of 6 boxes, positioned beside each other. The task is to discover a rule that describes the contents of each of the 6 boxes on the left-hand side, but do…
For puzzles that use an aspect of information theory - the processing and transmission of information.
A puzzle which involves networks. Often, such puzzle are in connection with mathematical graph-theory.
A combinatorial puzzle related to Latin squares.
a word, phrase, number, or other sequence of characters which reads the same backwards and forwards.
to play with words in order to find the solution.
Puzzles related to the video game 2048.
a chess problem in which one side, usually White, forces the the other side, usually Black, to checkmate them while the other side actively plays to avoid give checkmate. Please also tag…
For puzzles about locks or any other similar mechanisms.
For questions about the game of Tetris, or puzzles which involve or relate to this game. Not for general puzzles involving tetrominoes, which may be tagged [polyomino] instead.
Puzzles may involve a homonym, a word that is said or spelled the same way as another word but has a different meaning. A riddle may describe an almost impossible phenomenon where there are two disti…
Puzzles involving functional equations in mathematics. Use with [mathematics]
A puzzle asking about a proof (usually mathematical) expressed with diagrams and without words.
A question about electronic circuits and logic gates.
For questions seeking references, e.g. to literature about puzzling or to a specific puzzle.
Crossword puzzle in which strings of letters have been removed from each sentence, and the remaining letters rearranged to form a new sentence (but keeping the same order). The removed strings are the…
Word game in which players score points by placing tiles, each bearing a single letter, onto a gameboard which is divided into a 15×15 grid of squares. The tiles must form words in crossword fashion.
a well-known probability puzzle centered around three doors, two goats, and one car.
A question about categories, mechanics, or effects of puzzle in general, or about scientific research on puzzles.
a recreational activity in which locations, typically concealing hidden containers are found using a GPS enabled phone or similar device.
used for discussing the number of solutions of a puzzle type or a concrete puzzle.
a game, usually online, involving puzzles and ciphers hidden in mysterious videos, images or audio with a story behind them. Usually it is meant to promote a product.
MathJax programming puzzles have solutions that are automatically rendered anew each time they are browsed. (MathJax is Puzzling's on-site facility for displaying mathematics and is capable of much mo…
Question about the Homeworlds board game in which the players try to colonize the space in an epic, galaxy-wide struggle between Good and Evil.