How To Play
- Select difficulty level by clicking the text next to the big red title "Sudoku"
- Fill cells with numbers from 1 to 9
- Pick a number by clicking a cell (with the mouse) or a keyboard [1-9] key
- Delete a number by clicking a cell's (x) button or pressing the 'Delete' key while mouse is over a cell
- The board has 9 regions, each has 9 cells
- Rule 1 - each Region consist of unique numbers (1-9)
- Rule 2 - each Row of the board consist of unique numbers (1-9)
- Rule 3 - each Column of the board consist of unique numbers (1-9)