Initially activate the "Auto" option for converting single digit pencil marks into regular entries (only for initial setting, not changing the current mode).
Automatically check if the puzzle is correctly solved.
Show numbers of digits yet to be filled.
When highlighting all related cells, highlights follow your cursor movements. (Otherwise follow your clicks.)
Every day one new Sudoku puzzle for each skill level is provided here online for free. Now you can make a plan to give your brain a daily workout.
Printable versions of our daily Sudoku puzzles are also available online. Print out a copy and you can play our daily Sudoku offline.
Under the pencil mark mode, if you prefer all new single digit entries to be in normal font size (i.e., no single digit pencil marks), just check the "Auto" option on the left. May also check the first option below the grid to change the default setting.
First click to select a digit on the right side bar. Then click on the square in the grid where you want to place the selected digit. To switch back to the default keyboard mode, simply press the keyboard button. When finished, press "Done".