Remove numbers that can't go in a cell based on existing numbers in the row, column, and box.
Systematically mark possible numbers in each empty cell to narrow down solutions.
Sudoku is a logic-based number-placement puzzle that challenges your problem-solving skills.
Backtracking is a general algorithm for finding solutions to some constraint satisfaction problems, notably puzzles like Sudoku. The algorithm incrementally builds candidates for solutions and abandons a candidate (backtracks) as soon as it determines that the candidate cannot lead to a valid solution.
Heuristic algorithms use practical techniques to find satisfactory solutions. For Sudoku, heuristics like the 'minimum remaining values' (MRV) strategy can be used, which selects the empty cell with the fewest legal values left. This approach can significantly reduce the time to solve the puzzle.
Challenge yourself and improve your logical thinking!