Sudoku -Brain training puzzle-

It is a simple brain training puzzle that can be easily played during commuting to school or during breaks!

Sudoku puzzles can help improve attention, reasoning, and memory, improve children's abilities, prevent aging of the brain, prevent dementia, and maintain the abilities of people with dementia,
We recommend this Sudoku puzzle to train your brain!

There are four difficulty levels to choose from, so even beginners will have no problem.
There are four levels of difficulty to choose from, so even beginners can enjoy Sudoku puzzles!

If you want a quick brain training, this is the game for you! If you are looking for a quick brain training, please try this number-place game "Sudoku"!