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 puzzle in which you need to find and follow links to successive i.stack.imgur images in order to progress.
Puzzles related to Nim, a strategy game in which players take turns to reduce the number of objects in some sets, the aim being either to remove the last object or not to do so.
For puzzles related to Magic: the Gathering trading card game. For example, these could involve challenges like winning from a given board state, or puzzles related to a specific card or deck..
For questions related to the puzzle of islanders who can only leave when they deduce the colour of their own eyes.
Puzzles that revolve around a magic trick, or an illusion of sorts. Do not use this tag for a puzzle revolving around paranormal or ritual magical concepts.
For puzzles about using keys to open locks and doors.
For puzzles that involve a famous quotation.
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…
A combinatorial puzzle related to Latin squares.
A question about assessing or adjusting the difficulty level of a puzzle.
In a 'blackboard puzzle' a set of numbers is transformed according to certain rules.
For puzzles of the form "What do these three words have in common?"
For puzzles that use an aspect of information theory - the processing and transmission of information.
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.
For questions seeking references, e.g. to literature about puzzling or to a specific puzzle.
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…
A variety of cryptic crossword puzzle in which strings of consecutive letters have been removed from each clue, and the remaining letters respaced (but their order kept the same) to form a new sentenc…
Wordle is a word-guessing game where players have a maximum of 6 attempts to guess a 5-letter word. After each guess, players are told which letters aren't present in the word at all, which are presen…
A puzzle whose purpose is to play with words in order to find the solution.
A palindrome is a word, phrase, number, or other sequence of characters which reads the same backwards and forwards.
For puzzles about locks or any other similar mechanisms.
A puzzle that involves seven-segment displays, more commonly referred to as "digital" displays.
The Monty Hall problem is a well-known probability puzzle centered around three doors, two with a bad prize hidden behind, and one with a good one.
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.
A question about electronic circuits and logic gates.
Puzzles related to the video game 2048.
A selfmate is 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…
Puzzles involving functional equations in mathematics. Use with [mathematics]
A burr puzzle is an interlocking puzzle consisting of several three-dimensional pieces that are combined to make one three-dimensional unit.
A puzzle asking about a proof (usually mathematical) expressed with diagrams and without words.
For use in puzzles where a specific order of events or decisions needs to be made.
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…
A question about categories, mechanics, or effects of puzzle in general, or about scientific research on puzzles.
Geocaching is an outdoor recreational activity, in which participants use a GPS-enabled phone or similar device to hide and seek containers - called "caches" or "geocaches" - at specific locations mar…
Dots and Boxes is a 2-player pencil-and-paper game in which the players take turns to fill in lines of a grid, claiming each square of which they fill in the 4th side. The aim is to claim as many squa…