Sudoku Puzzle FOR EXPERTS

*** Free Advanced Level Brain Training Number Place Puzzles ***

Free Sudoku puzzles you can play whenever you have free time.
This app only has difficult puzzles aimed at advanced level players.
The number of available difficult puzzles is 250! (There are plans to add more in the future.)
Play all stages free, with no charges!
This puzzle application is sure to leave you satisfied！
How many can you solve？

Characteristics
- A design that is simple and easy to see.
- You can change the color or font settings according to your mood.
- There is a feature that lets you suspend the game, and later resume from where you left off.
- Available in 5 languages.