Quote Originally Posted by si_the_geek
Just a quick note, there is a competition starting soon (in the VBForums Coding Contests forum) for a Sudoku solver, so you may not want to make your methods too public


NotLKH, thanks for that - I haven't had a chance to look yet (no .Net at home ), but I'm sure I'll have fun with it
The code I posted creates the base of a sudoku.
Since then, I've brought it up to speed for creating true sudoku, with N-cells exposed. The above image is one of the thousands that its made.

I've got a few more tweaks to make it build harder problems, but I have little time to incorporate them. By this time next week, I should have it making some really tough ones.