Mr. Binairo is a binary puzzle game also know as Takuzu, Binero or Binary Sudoku. Play now and challenge your brain! Features. 4 different grid sizes - 6x6 / 8x8 / 10x10 and 12x12. 1000 grids available. Highlight cells when rules not respected. Undo/Redo buttons. Auto save game and continue playing whenever you want. Timer to beat your previous time.