Introduction to Sudoku

Sudoku is a popular puzzle game that originated in Japan. It consists of a 9x9 grid divided into nine 3x3 sub-grids. The goal of Sudoku is to fill in the empty cells of the grid with numbers from 1 to 9, ensuring that each row, each column, and each sub-grid contains all the digits from 1 to 9 without any repetition.

Sudoku provides a fun and challenging way to exercise logical thinking and problem-solving skills. It requires careful deduction and elimination to determine the correct placement of numbers in the grid.

The rules of Sudoku are simple:

• Each row must contain all the numbers from 1 to 9 without any repetition.
• Each column must contain all the numbers from 1 to 9 without any repetition.
• Each 3x3 sub-grid must contain all the numbers from 1 to 9 without any repetition.

Let's dive deeper into the mechanics of solving Sudoku using the backtracking algorithm.