Hack Brain Sudoku

Classical Sudoku with two mode: Predefined and Random. Very Hack brain.

The classical Sudoku game with high level difficult. Player can choose number from 1 to 9 that every row, column and square (3x3) isn't duplicate.

In game, we have two mode: Predefined and Random.

Predefined mode: Easy, Medium and Hard

Random mode: Easy, Medium and Hard

Be careful, this game is very hack brain. Please relax 30 minutes after playing a round.