Warning
The puzzle generating algorithm is suspected of generating non-unique puzzles
Caution
This package is currently not available through packagist/composer
Library for generating, validating, solving sudoku puzzles
To use this package, simply run composer require coenmooij/sudoku.
Exposes the main functionality of the library in a service.
Solves any solvable grid using an informed backtrack algorithm. Throws an UnsolvableException if it fails.
Solves the grid using only row, column and block checks. Will return the (partially) completed Grid.
Generates a complete Grid
Creates a puzzle based on a complete Grid and a Difficulty
Difficulty ranges from 1-5 and can be accessed by a constant. e.g. Difficulty::EASY.
From a grid it creates hints. It returns locations which can be solved by row, column & block checks. You can either get a random one or all of them.
GridSerializer is a simple serializer that turns a 81 character string into a Grid and back.
e.g. 642957138719843652538126794483712569976538421125694387294361875357489216861275943
Empty values will be serialized to 0 but the deserializer also accepts alphabetical characters as empty values.
Helper class to see if it is 'safe' to dig out the value at a certain Location. It checks whether the Grid is still uniquely solvable.
Simple utility class to check if all (row, column and block) constraints are still met.