Sudoku Py / C++11 / D?

[Chris Cain]

On Friday, 24 August 2012 at 23:14:02 UTC, maarten van damme 
wrote:
> http://en.wikipedia.org/wiki/File:Sudoku_puzzle_hard_for_brute_force.jpg

It occurs to me that one of the main reasons why this particular 
puzzle would be hard for brute force is that the first line is 
blank and more than half of the second line is blank, and it 
seems like it is designed to have as many choices as possible 
before a set square is encountered.

I bet it could be solved much quicker by a computer by doing it 
in reverse.

I've got some ideas, maybe I'll write a solution to this myself. 
:)