AJAX (XSLT) Sudoku Tools

I've been having some fun recently building Sudoku puzzle solving tools with AJAX techniques. At the moment the tools don't do much other than render a sudoku puzzle and perform 1-round of possible elimination, but the way they do it (with client-side XSLT and a little bit of JavaScript) is kind of cool.

If you are interested, have a play. I plan to extend the functionality over time.