How to Play Sudoku
Sudoku is a logic-based, combinatorial number-placement puzzle. The objective is to fill a 9×9 grid with digits so that each column, each row, and each of the nine 3×3 subgrids that compose the grid contain all of the digits from 1 to 9.
Rules of the Game
- Every square has to contain a single number.
- Only the numbers from 1 through 9 can be used.
- Each 3×3 box can only contain each number from 1 to 9 once.
- Each vertical column can only contain each number from 1 to 9 once.
- Each horizontal row can only contain each number from 1 to 9 once.
Tips for Beginners
Start by looking for the most crowded rows or columns. If a row has 8 numbers filled in, logic dictates there is only one possible number left. This is called 'scanning'.