Sudoku Solver

Watch Sudoku puzzles unravel in front of your eyes, as a simple algorithm solves puzzles of any difficulty level with elan. The puzzle takes input for a cell through a pop up number pad, with keys for invalid numbers for that cell getting disabled automatically. The current state of the solver displays only one solution for a puzzle with multiple solutions. The solver also points out puzzles with no valid solutions. (The puzzle in the screenshots is the Al Escargot)