Sudoku Master for Brains: Solo play, online battle

Train your brain by solving sudoku puzzles! Have a vast number of puzzles in your pockets.
The difficulty level can be selected according to your sudoku skills.
For beginners: Easy & medium levels
For mid level players: Medium & Hard levels
For enthusiastic players: Insane & inhuman levels
Choose any level as you like.
Train your brains and experience a fantastic moment when you solve them!
You can play with your friends online, and enjoy your life at home!
* Sudoku (, digit-single) is a logic-based, combinatorial number-placement puzzle.
In classic sudoku, the objective is to fill a 99 grid with digits so that each column, each row, and each of the nine 33 sub-grids that compose the grid contain all of the digits from 1 to 9.
The puzzle setter provides a partially completed grid, which for a well-posed puzzle has a single solution.

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