Sudoku

Sudoku is a logic puzzle played on a 9×9 grid. The goal is to fill every cell with digits 1-9 so that each row, column, and 3×3 box contains each digit exactly once.

What are the basic rules of Sudoku?

Fill the 9×9 grid with digits 1-9 so that each row, column, and 3×3 box contains each digit exactly once without repetition. Use the given clues (pre-filled numbers) to deduce the rest.

What strategies help solve Sudoku?

Basic strategies: ① Naked Singles (only one digit can go in a cell) ② Hidden Singles (a digit can only go in one cell within a row/column/box). For harder puzzles, use pencil marks to track candidate numbers.

What determines Sudoku difficulty?

Difficulty is determined by the number of given clues and the complexity of techniques required to solve it. Easy puzzles can be solved with basic strategies, while hard puzzles may require advanced techniques like X-Wing or Swordfish.

What are the basic rules of Sudoku?

Fill the 9×9 grid with digits 1-9 so that each row, column, and 3×3 box contains each digit exactly once without repetition. Use the given clues (pre-filled numbers) to deduce the rest.

What strategies help solve Sudoku?

Basic strategies: ① Naked Singles (only one digit can go in a cell) ② Hidden Singles (a digit can only go in one cell within a row/column/box). For harder puzzles, use pencil marks to track candidate numbers.

What determines Sudoku difficulty?

Difficulty is determined by the number of given clues and the complexity of techniques required to solve it. Easy puzzles can be solved with basic strategies, while hard puzzles may require advanced techniques like X-Wing or Swordfish.