Slitherlink

Slitherlink is played on a grid of dots, where you draw lines along the edges between dots to form a single continuous loop. Some cells contain a number from 0 to 4, showing exactly how many of that cell's four edges the loop must use. The loop can never branch or cross itself — when every number is satisfied, the loop is complete and unique.

One continuous loop, drawn to match every number.

Learn the rules for Slitherlink below to get ready.

Über Slitherlink

Slitherlink is played on a grid of dots, where you draw lines along the edges between dots to form a single continuous loop. Some cells contain a number from 0 to 4, showing exactly how many of that cell's four edges the loop must use. The loop can never branch or cross itself — when every number is satisfied, the loop is complete and unique.

So spielst du Slitherlink

  1. The board is a grid of dots; you draw segments along the lines between adjacent dots.
  2. Numbered cells show exactly how many of their four surrounding edges must be part of the loop.
  3. Unnumbered cells have no restriction — the loop can use any number of their edges.
  4. The finished lines must form exactly one closed loop, with no branches, no crossings, and no separate loops.
  5. The puzzle is solved when every number is satisfied and the loop closes into a single continuous shape.
Full Slitherlinkguide — tips & FAQ

Tipps & Strategie

  • A '0' cell means none of its four edges are used — mark all four as definitely not part of the loop right away.
  • A '3' cell means all but one edge is used; a '1' cell means only one edge is used — both are strong starting points.
  • Two diagonally touching cells with '3' clues often force a specific corner configuration — look for these patterns early.
  • Every dot on the finished loop touches exactly zero or two loop edges — never one, and never three or four — use that to rule out dead-end lines.

Slitherlink FAQ

Can the loop cross over itself?

No — the finished lines form exactly one simple closed loop, with no crossings, branches, or separate smaller loops.

Do all cells have a number?

No — many cells are left blank, meaning the loop can pass through any number of their edges without restriction.

Is Slitherlink the same everywhere?

The core rules are consistent worldwide; it's also published under names like Fences or Loop the Loop.

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