How to play Slitherlink

Draw one closed loop on the grid.

• A number tells how many of the 4 edges are part of the loop.
• Blank cells have no count rule.
• The final path is one loop: no forks, dead ends, or extra loops.
• Lines go only on grid edges.

• In the app, tap an edge to toggle a line.
• Use line and empty marks to narrow options.

In the app, tap Hint for a suggested line change.

• Start with 0, 3, and 4 clues.
• A 0 cell has no loop edges.
• A 3 or 4 cell forces many edges.
• Avoid T-junctions and dead ends.