This document discusses using backtracking to solve Sudoku puzzles. It begins with a brief overview of Sudoku, explaining the rules and goal. It then introduces backtracking as a technique that starts with possible moves and backtracks if a partial solution cannot be completed. The key steps of the backtracking algorithm are outlined: finding unassigned cells, trying digits, checking for conflicts, recursively solving, and backtracking if needed. An example puzzle is provided and it is explained how the algorithm would solve it by moving through the steps. Important notes about backtracking are that it will find all solutions but uses significant time and space for large problems.