Slitherlink 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 Slitherlink on the computer. If you are not yet familiar with the puzzle rules, please go to Slitherlink rules.
Drawing and excluding links
Slitherlink Interactive is played by linking pairs of dots around clues. First click links dots with a line, second click marks X to indicate link is excluded and the third click brings path back to its original state.
When all paths around a clue are accounted for, the clue will change color to indicate it is completed.
Highlighting loop segments
Highlighting a loop segment is helpful when checking whether two loops are about to occur. To highlight a loop segment, click mouse on any of the clues belonging to the segment.
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 links and X markings 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 Slitherlink Interactive 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.