Skip to content
A small DLX based Sudoku Solver in Ruby. Comes with a general purpose DLX implementation
Find file
Latest commit 973cfd7 Mathias Biilmann Christensen Links in README fixed
Failed to load latest commit information. Links in README fixed
dlx.rb First commit
examples.rb First commit
sudoku_solver.rb First commit

Ruby DLX Based Sudoku Solver

This is a small DLX based sudoku solver made in Ruby. DLX, or Dancing Links X is an algorithm for solving exact cover problems by brute force, taking advantage of a clever way of juggling around with the pointers in a sparse matrix of doubly linked list.

The original paper is available at

The two important files in this repository is dlx.rb - a general implementation of the DLX constraint solving algorithm, and sudoku_solver.rb - which does the setup of the sparse matrix for a given sudoku and translates from the dlx result to a sudoku solution.

The solver (extracted into a C extension) is used to generate the sudokus at my simple sudoku challenge challenge page.

Something went wrong with that request. Please try again.