Sudoku solver

Solve sudoku problems using Node.js and output the solution in the terminal

var SudokuSolver = require("../index");

SudokuSolver.solve({
    problem: '. . 3 . 2 . 6 . .'
           + '9 . . 3 . 5 . . 1'
           + '. . 1 8 . 6 4 . .'
           + '. . 8 1 . 2 9 . .'
           + '7 . . . . . . . 8'
           + '. . 6 7 . 8 2 . .'
           + '. . 2 6 . 9 5 . .'
           + '8 . . 2 . 3 . . 9'
           + '. . 5 . 1 . 3 . .'
  , style: true
  , initial: true
}).printSolution();

Result will be:

Problem:
------+-------+------
0 0 3 | 0 2 0 | 6 0 0
9 0 0 | 3 0 5 | 0 0 1
0 0 1 | 8 0 6 | 4 0 0
------+-------+------
0 0 8 | 1 0 2 | 9 0 0
7 0 0 | 0 0 0 | 0 0 8
0 0 6 | 7 0 8 | 2 0 0
------+-------+------
0 0 2 | 6 0 9 | 5 0 0
8 0 0 | 2 0 3 | 0 0 9
0 0 5 | 0 1 0 | 3 0 0
------+-------+------

Solution:
------+-------+------
4 8 3 | 9 2 1 | 6 5 7
9 6 7 | 3 4 5 | 8 2 1
2 5 1 | 8 7 6 | 4 9 3
------+-------+------
5 4 8 | 1 3 2 | 9 7 6
7 2 9 | 5 6 4 | 1 3 8
1 3 6 | 7 9 8 | 2 4 5
------+-------+------
3 7 2 | 6 8 9 | 5 1 4
8 1 4 | 2 5 3 | 7 6 9
6 9 5 | 4 1 7 | 3 8 2
------+-------+------

Problem can be a one line string 003020600900305001001806400008102900700000008006708200002609500800203009005010300 or a formatted string (like in example), with 0 or . for missing numbers.

Methods

solve (options)

Solves the problem and returns an object.

• @options - Object - containing the following:
  • problem - String - representing the sudoku problem.
  • initial - Boolean - print the problem (default: false)
  • style - Boolean - format the output (default: false)

solve (options).toString(style)

Converts the solution to string.

• @style - Boolean - if true, the stringified solution will be styled.

solve (options).printSolution(style)

Prints the stringified solution in terminal.

• @style - Boolean - if true, the stringified solution will be styled.

Specs

Test the global functions with:

$ jasmine-node spec

Example

There is an example in test foloder 1.js. Run it with node test/1.js

Changelog

• 0.0.2: Add option to format the output: ([#2] (https://github.com/radubogdan/sudoku-solver/issues/2))
• 0.0.1: Format test file and validate string: ([#1] (https://github.com/radubogdan/sudoku-solver/pull/1))
• 0.0.0: First working version

License

See the LICENSE file.