Tags
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 that requires an example to be built that fits certain criteria.
141 questions
Puzzles that involve strategic decision making, usually involving either competitive or cooperative choices between a number of participants.
134 questions
Retrograde analysis is a technique employed to determine which events occurred leading up to a given situation.
132 questions
A puzzle in which the hidden pattern behind a given sequence of letters is to be found. Use with [sequence]
129 questions
Puzzles which require some knowledge of science to solve. Consider using the [physics], [chemistry] or [computer-science] tags if your question is specifically about these branches of science.
128 questions
Puzzles tagged with word-search should generally be about finding words within a grid, these types of puzzles are mass-producible so adding a twist or spin to them is a good idea.
122 questions
The answer to a problem may be known but it is not understood. These questions explicitly request additional details on how a problem is solved or why the current solution is appropriate.
115 questions
Puzzles that use number properties such as even and odd, multiples of numbers, part of a well-known sequence (i.e. Fibonacci) or theorem (Pythagorean relations) or others in part of the method to solv…
115 questions
A puzzle from 2-dimensional or 3-dimensional geometry centered around matchsticks, often involving moving, adding, or removing some to achieve some defined goal.
112 questions
A puzzle related to magic squares: grids of integers where all rows, columns, and diagonals have the same sum.
104 questions
A puzzle relating to physics equations or physical principles such as energy, entropy, and classical/quantum mechanics.
102 questions
Puzzles where perfect logicians are told different pieces of information, and the reader must figure out something based on their words and actions.
102 questions
Puzzles that involve nonograms (also known as *Hanjie* or *Japanese Puzzle*), logic puzzles where runs of colored cells are given at the edges of the grid. Use with [grid-deduction] and [logical-deduc…
94 questions
OPEN-ENDED PUZZLES ARE NO LONGER IN SCOPE. Used when no answer can be guaranteed to be the last, best one. If a puzzle instead has a provably optimal solution, tag with [optimization].
93 questions
For puzzles that contain an element of humour or wit. Please do not use this tag to post simple jokes which are not puzzles, and remember that questions should be uniquely answerable.
92 questions
A puzzle related to concepts in computer science, such as algorithms or information theory.
91 questions
A sliding blocks puzzle is a puzzle which involves sliding blocks into a desired end configuration.
88 questions
A puzzle that is primarily built around a well-known book, novel, drama, poem, or author.
87 questions
A metapuzzle (or meta) is a puzzle composed out of the solutions to other mostly disjoint puzzles.
84 questions
Cooperative games where a team of players must try to guess the color of their hat, but can only see their teammates' hats.
80 questions
A puzzle that involves arranging objects optimally in order to fit in a specified space.
80 questions
A question relating to interpretation of clues in a crossword puzzle, or to generation of clues in a crossword puzzle. Use [cryptic-clues] for clues obeying the conventions of cryptic crosswords, [cro…
79 questions
for questions where the answerer must identify a puzzle type based on deliberately limited information about its nature, such as notes made in the course of solving it. For questions where…
78 questions
Slitherlink is a logic puzzle where the goal is to draw a loop so each number has that many edges of the loop adjacent to it. Use with [grid-deduction] and [logical-deduction].
78 questions
A puzzle related to sports competitions, sports tables, sports records, or the history of sports.
76 questions
Questions about Minesweeper (the game or the [grid-deduction] puzzle genre). Some non-bomb cells display the number of adjacent bombs, and finding all bombs is the goal. In the puzzle some numbers are…
75 questions
A puzzle in which certain letters, e.g. of each word, line, or paragraph, form a meaningful word or words when put together.
74 questions
A puzzle that involves and requires knowledge of prime numbers. Use with [mathematics]
72 questions
A mathematical puzzle about the manipulation and solution of equations. Use with [mathematics]
67 questions
A puzzle that involves tiles (or the concept of tiles) in the shape of 2x1 rectangles, divided into 2 squares, each containing 0 to 6 spots. It may require knowledge of general rules of the game, Dom…
67 questions
A puzzle that makes use of chemical knowledge, such as the names and atomic numbers of chemical elements.
64 questions