Hitori puzzles can be played interactively on the computer, offering many features and advantages compared to pencil and paper. This section explains everything about how to play Hitori on the computer. If you are not yet familiar with the puzzle rules, please go to Hitori rules.
Shading and un-shading squares
Hitori interactive is played by shading and un-shading squares in a grid. First click un-shades the square, second click shades the square and the third click brings the square back to its original state. Mouse clicking order may be reversed using the Preferences dialog box.
All game functions are accessed through the toolbar. For some toolbar buttons, keyboard shortcut keys are also available as listed below. Toolbar may be positioned horizontally or vertically using the rotate button on the left edge, and relocated anywhere in the game by dragging its frame.
Enlarge small puzzles for best viewing on your screen.
Reduce large puzzles for best fit on your screen.
Undo (Keyboard: U)
Go back as many steps in the game as you want.
Redo (Keyboard: R)
Go forward after using Undo as many steps as you want.
Restart puzzle to solve from the beginning.
Check puzzle (Keyboard: C)
Check all shaded and un-shaded squares for errors.
Show elapsed solving time.
Show solution of the puzzle. Using this button will also end the game.
Open Preferences dialog box. New preferences will be automatically saved on the computer.
Open About dialog box to see puzzle size, difficulty, ID, title and other information.
Open How to play Hitori page you are reading now.
Open Print dialog box. New print options will be automatically saved on the computer.
Save puzzle (Keyboard: S)
Save current state of the puzzle.