This is a professional Sudoku game. There are five difficulty levels of puzzles in this game, from beginner to expert, each difficulty carefully crafted. To facilitate you to complete Sudoku and learn Sudoku skills, we provide a wealth of features.

• Candidate: Check the numbers that can be filled in each cell in the current state.
• Hint: For the two types of questions: beginner and easy, you can view the numbers that can be filled in directly, and for the two types of questions: medium and hard, you can view the sudoku solution tips.
• Pure Note: You can write down the candidates for a specific grid and eventually deduce the numbers that can be filled in.
• Help: The game provides a help page for you to understand the rules of Sudoku and how to use the software.

We hope to give you an enjoyable experience.