Sudoku

Sudoku is a logic-based, number-placement puzzle game. The objective is to fill a 9 x 9 grid with digits so that each column, each row, and each of the nine 3 x 3 subgrids that compose the grid contains all of the digits from 1 to 9.
This is a work in-progress and will have bugs or not work at all. Feel free to provide feedback via [email protected].