How can I solve a Sudoku puzzle using backtracking?

How can I solve a Sudoku puzzle using backtracking?

To solve a Sudoku puzzle using backtracking, you start by filling in the empty cells one by one. If you reach a cell where no number can be placed without violating Sudoku rules, you backtrack to the previous cell and try the next number.

What are the basic rules of Sudoku?

The basic rules of Sudoku are: each row, column, and 3x3 grid must contain all digits from 1 to 9 without repetition.

Can you show me a simple example of backtracking in Sudoku?

Sure! Let's say you have a partially filled Sudoku grid. You would start with the first empty cell, try placing a number, and check if it’s valid. If it is, move to the next empty cell. If not, backtrack and try the next number.

How do I know when to backtrack?

You backtrack when you find that placing a number in a cell leads to a conflict with the Sudoku rules. This means that the current number placement is not valid.