How is backtracking used in Sudoku?

Can you explain how backtracking is used to solve Sudoku puzzles?

Sure! Backtracking is a method used to find solutions by trying out different possibilities and eliminating those that don't work.

How does the algorithm decide which number to place in a cell?

The algorithm typically tries numbers from 1 to 9 in an empty cell and checks if placing a number violates Sudoku rules.

What happens if a number leads to a conflict?

If a conflict arises, the algorithm backtracks by removing the last placed number and tries the next possible number.

Is backtracking the only method to solve Sudoku?

No, there are other methods like constraint propagation and heuristic approaches, but backtracking is one of the most common.

Can you give an example of a Sudoku puzzle solved using backtracking?

Absolutely! I can walk you through a simple 4x4 Sudoku example if you'd like.