# How To Solve Sudoku Puzzles

Sudoku is generally played on a grid of 9 x 9 squares. There are other variants of Sudoku with smaller and larger grids.

Each puzzle contains nine rows, columns, and boxes.

### Rows (Horizontal)

Each row must contain numbers 1 to 9 with no repeats. There are nine rows in the grid.

### Columns (Vertical)

Each column must contain numbers 1 to 9 with no repeats. There are nine columns in the grid.

### Boxes (3 by 3 Squares)

Each box must contain numbers 1 to 9 with no repeats. There are nine boxes in the grid.

A Sudoku puzzle will provide some numbers for you.

To complete the puzzle, fill the empty squares with a missing number according to the following rules:

1.  Each row, column, and box must contain all the numbers from 1 to 9.

2.  Each number from 1 to 9 can only be in each row, column, and box once (no repeats).

Once the puzzle is solved, each row, column and box will contain every number from 1 to 9 only once as seen in this example solution.