# Sudoku

### From PuzzleWiki

Sudoku, also called Number Place, is a type of Constraint Satisfaction Grid puzzle. It is one of the more well-known types, syndicated and published all over the world.

## Contents |

# Description

A sudoku puzzle generally takes the form of a nine-by-nine grid, of which some of the cells are filled in with digits. These cells are called the "given numbers", or **givens** for short.

# Rules

Place the digits 1 through 9 into the empty cells in the grid (a single digit per cell) so that each digit appears exactly once in each of the following regions: the nine rows, the nine columns, and the nine outlined 3×3 regions.

# Example

Puzzle by Wei-Hwa Huang.

# Aesthetic Constraints

Published puzzles are often symmetric.

# History

Number Place puzzles were invented by Howard Garns.