# Logic puzzle genre

Many newspapers and magazines regularly print logic puzzles that always have to be solved according to the same rules. A well-known example is Sudoku . In order to distinguish these from individual examples of such puzzles, as well as from completely different logic puzzles (e.g. mathematical riddles ), a **logic puzzle genre** is used here .

## General properties

### Instructions and information

All types of logic puzzles have in common that the task to be solved consists of instructions and information. The instructions (also: rules) denote the solution rule that applies to every logic puzzle of a type, e.g. E.g. in Sudoku the text: “Fill the fields of this grid with the numbers from 1 to 9 so that each column, each row and each 3 × 3 block contains these exactly once.” The information, however, consists of the always various specifications that can be assumed; in the example of Sudoku these are the numbers already drawn.

There is always exactly one, clear solution.

### Common structures

Most types of logic puzzles are based on a grid of square fields. Often these have to be filled in with numbers or other symbols, sometimes connected to form closed areas, sometimes a line has to be drawn along their borders. In honeycomb or some variants of Slitherlink is a grid of hexagonal fields. Others, such as the symbol puzzle or Hashiwokakero, have completely different structures. With Loopy, on the other hand, a closed curve must be found *in* the fields.

For many genera it is the case that the specification is of the same form as the solution to be found. One example is Sudoku: some numbers have already been drawn in, the rest have to be found.

## Emergence

The first such logic puzzle was published on November 19, 1892 in the French daily *Le Siècle* . It was a magic square , from which some numbers were removed, which the reader should reconstruct. Since a large number of other puzzles can be created according to the same principle, i.e. with the same instructions but different information, this can be referred to as a logic puzzle genre. Indeed, such puzzles appeared in *Le Siècle* for several years . From this genre Sudoku later developed, which was first published in puzzle magazines and then in many newspapers worldwide.

The symbol puzzles , which initially appeared in logic puzzle magazines , were also represented in newspapers early on . These two types of puzzles made such logic puzzles very well known due to their wide publication, whereupon many puzzle authors devised other such "series-capable" puzzles. These appear mostly in puzzle magazines, but the most popular also appear in daily newspapers and other media.

## Bibliography

- ^ Christian Boyer: Supplément de l'article "Les ancêtres français du sudoku" Archived from the original on December 10, 2006. (PDF) In: Pour la Science (reprint) . May 2006, pp. 1-6. Retrieved August 3, 2009.