1. Look at the grid. Each row, column, and 3x3 Box should contain the Numbers 1-9 without repeating.
2. Choose a number to start with.
3. Look for that number in the row, column, and 3x3 Box.
4. If the number is not present, place it in the empty cell.
5. Repeat Steps 2-4 until all cells contain a number from 1-9.
6. If you get stuck, try using logic to eliminate possibilities.
7. Once all cells are filled, check to make sure each row, column, and 3x3 Box contains the Numbers 1-9 without repeating. If not, go back and make changes until all Numbers are Correct.