Conceptual Sudoku solver uniqueness check illustration with an abstract puzzle board branching toward two candidate boards. Conceptual Sudoku solver uniqueness check illustration with an abstract puzzle board branching toward two candidate boards.

Build a Sudoku Solver That Checks Uniqueness, Not Just Finds an Answer

Finding one board does not prove uniqueness. Our original Python exercise runs eight Sudoku fixtures across nine cases, validates six returned boards and preserves uncertainty when certification is deliberately stopped.