Sudoku Clarity

Sudoku uses a 9×9 grid divided into nine 3×3 boxes. Some cells start with given numbers. Your task: fill all empty cells so each row, each column, and each box contains every number from 1 to 9 once. You never guess. You look at existing numbers and eliminate impossible positions step by step. For example, if a row already has a 5, no other cell in that row can be 5. If a column misses a 3 and only one empty cell in that column can accept it (after checking the box), that cell must be 3. With practice, you learn patterns like hidden pairs. Sudoku sharpens your logic and patience. The puzzle always has one correct solution.