Sudoku

Game Rules:

1. Each cell can only contain one number from 1-9

2. No repeated numbers in any row

3. No repeated numbers in any column

4. No repeated numbers in any 3×3 box

Game Controls:

- Click on empty cells to select them

- Click number keys to input numbers

- Click clear button to delete numbers

- Use power-ups to help solve difficult puzzles

Power-up Guide:

- Hint: Automatically fill in a correct number

- Undo: Undo the last move

- Analyze: Show possible candidate numbers for selected cell