By Håvar Henriksen, havar.info.
Interface based on Sudoku solver by Peter Nederlof.
This is a Python based sudoku solver made by Peter Norvig: Solving Every Sudoku Puzzle
I just made it into a webservice, using Javascript, PHP and Python. Since I'm a PHP coder, and not a Python coder, some of this code is made in PHP while the sudoku solver part is made in Python.
This Python based solver is claimed to be able to solve every solveable sudokus, and I've tested it succesfully with several evil sudokus from websudoku.com. The claim was made by the author of the original script, and not by me.
This Sudoku solver is very fast, and faster than the The Ultimately Fast Sudoku Solver, it solved the first of the Top 10 Hardest Ever Solved-Sudoku in just 16.1929 milliseconds (0.016 seconds), while "The Ultimately Fast Sudoku Solver" used 91703 milliseconds (91.70 seconds) on that same sudoku board.
You could download all of the files used in this project:
index.php
sudoku.css
sudokusolver.py