Though languages like Prolog and APL make brute-forcing suduko trivial, I'm pleased with how little code it took in c#

I put the results on github a while back: http://github.com/AnthonySteele/SudokuSolver/blob/master/Sud...

IMHO the fact that it's fast and not very complex to brute-force Sudoku makes it a lot less interesting as a puzzle for people to solve.