What is the Sudoku game, how does it work?

According to the introduction of Neeraj singh, Sudoku is a Board game on the Android platform. There is currently a 1.4 version released on Jun 23, 2018, you can see the details below.

Sudoku for beginners and advanced players.
Whether you'd like to relax or keep mind active – pass your free time in a pleasant way! Get a small stimulating break or clear your head with sudoku. Take your favorite app with you wherever you go. Playing Sudoku on mobile is as good as with a real pencil and paper.

Choose any level you like. Play easier levels to exercise your brain, logical thinking and memory, or try hard levels to give your mind a real workout. Our classic puzzle game has some features that make sudoku easier for you: hints, auto-check, and duplicates highlight. You can use them or complete the challenge without help – it's up to you! What's more, in our app each puzzle has one solution. You will find all you need whether you are playing your first sudoku, or you've progressed to expert difficulty.

Features
✓ Challenge yourself figuring out your mistakes, or enable Auto-Check to see your mistakes as you go
✓ Highlight duplicates to avoid repeating numbers in a row, column and block
✓ Hints can guide you through the points when you are stuck

More features
- Statistics. Track your progress for each difficulty level: analyze your best time and other achievements
- Unlimited Undos. Made a mistake? Just put it back quickly!
- Auto-save. If you leave a sudoku unfinished it will be saved. Continue playing anytime
- Highlighting of a row, column and box related to the selected cell
- Eraser. Get rid of all mistakes

Highlights
• More than 5,000 well-formed puzzles
• 9x9 grid
• 4 perfectly balanced levels of difficulty: easy, medium, hard, and expert
• Support both phones and tablets

Improve performance