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.
For questions related to the puzzle of islanders who can only leave when they deduce the colour of their own eyes.
A puzzle involving making connections between several clues in a list.
Puzzles centered around tic-tac-toe (a.k.a. noughts and crosses).
A question about assessing or adjusting the difficulty level of a puzzle.
For puzzles that use an aspect of information theory - the processing and transmission of information.
A bongard consists of mainly 6 boxes on the left and 6 boxes on the right. The task of a bongard problem is to discover a statement that describes the contents of each box on the left side, but does n…
A type of puzzle typically involving a grid of lights, in which the challenge is to get them all to the same state (on or off). The trick is that each light also affects a number of its neighbors, wi…
A puzzle which involves networks. Often, such puzzle are in connection with mathematical graph-theory.
a word, phrase, number, or other sequence of characters which reads the same backwards and forwards.
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…
puzzle includes emoji in the question, often the goal of the questions involves deciphering their meaning.
A puzzle asking about a proof (usually mathematical) expressed with diagrams and without words.
A question about categories, mechanics, or effects of puzzle in general, or about scientific research on puzzles.
used for discussing the number of solutions of a puzzle type or a concrete puzzle.
a well-known probability puzzle centered around three doors, two goats, and one car.
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…
a recreational activity in which locations, typically concealing hidden containers are found using a GPS enabled phone or similar device.
Raven's Progressive Matrices or similar puzzles: visual designs with a missing piece, often a 3x3 matrix with a corner missing, and a number of choices to pick from and fill in the missing piece
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 …
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 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.
A puzzle that involves seven-segment displays, more commonly referred to as "digital" displays.
an interlocking puzzle consisting of several three-dimensional pieces that are combined to make one three-dimensional unit.
For use in puzzles where a specific order of events or decisions needs to be made.
For questions seeking references, e.g. to literature about puzzling or to a specific puzzle.
The Frobenius problem asks for the largest amount that cannot be obtained by using only coins of specified denominations.