Sudoku Solver

This page contains a free, fast, brute force Sudoku puzzle solver.

The algorithm used is Knuth's Dancing Links, which is a technique to implement his Algorithm X for solving exact cover problems. This algorithm can be easily applied to Sudoku. It is one of the most efficient algorithms for solving Sudoku puzzles.

This page implements the solver entirely in Javascript. You can save this page on your computer for offline solving without having to be connected to the internet.

Greg Hewgill <>