Free to use, no account
Slitherlink Puzzle
Draw a single closed loop along the grid lines. Each number tells you exactly how many of its four surrounding edges belong to the loop.
Slitherlink puzzle grid
New puzzles are generated on this device and accepted only after a bounded local search confirms one solution. Generation uses device processing and may take longer on a slower phone or computer.
Rules
Draw one continuous, closed loop along the grid edges. A number shows how many of that cell’s four sides are part of the loop. A grid corner touched by the loop must have exactly two selected edges. Tap an edge again to remove it.
How do you solve a Slitherlink puzzle?
Click or tap an edge to switch it on or off. The loop must be continuous, every used corner must have exactly two line segments, and each numbered cell must have the stated number of surrounding edges. Use Check board to find mistakes, Undo to reverse a move, or One-edge hint for a small nudge.
Frequently asked questions
How do you solve a Slitherlink puzzle?
Click or tap an edge to switch it on or off. The loop must be continuous, every used corner must have exactly two line segments, and each numbered cell must have the stated number of surrounding edges. Use Check board to find mistakes, Undo to reverse a move, or One-edge hint for a small nudge.
Is my Slitherlink puzzle uploaded or saved?
No. Puzzle generation, checks and hints run locally in this page. Your moves are not uploaded or saved by UsefulVerse.
What is the rule for the numbers in Slitherlink?
Each number from 0 to 3 is the exact count of the four grid edges around that cell that must be part of the loop. Empty cells have no number clue.
Can a Slitherlink solution contain two separate loops?
No. The drawn edges must make exactly one closed, continuous loop. Every corner on the loop has two selected edges; no branches or detached loops are allowed.
Does this free Slitherlink game save my moves?
No. The puzzle is generated and checked in your browser. Moves are not uploaded or saved; start a new puzzle to get another board.