Hi Dan, I hope you have a lot of fun playing around with this.  I certainly did!  And you may find that you can improve on my logic, for which...

Hi Ben, thanks for your comment.  I often wonder if insecurity prompts folk to over-complicate things, whether that is code or anything else.  But it is quite likely that that...

Management Studio here.  If it ain't broke, then don't fix it.

This looks quite absolutely intriguing.  I have written a Sudoku Solver in Excel, but I am really looking forward to getting some time to sit down with this SQL solution...

Thanks for the various responses, which are much appreciated.  I have fixed thousands of problems over the years, but the vast majority are not that exciting - problems resolved by...