Slitherlink
Draw a single closed loop on a dot grid so that every numbered cell has exactly that many of its edges on the loop. The classic Loopy-style logic puzzle — every level is procedurally generated with a guaranteed unique solution, in an endless campaign per difficulty.
Goal: Draw ONE single closed loop (no crossings, no branches) so that every numbered cell has exactly that many of its edges on the loop.
- Tap/click an edge: 1st tap draws a line ─, 2nd marks × (ruled out), 3rd clears it
- Right-click: quick × mark
- ↶/↷ Undo / Redo
- ✓ Check: highlights contradictions in red
- 0×: auto-mark × around every 0 cell
- ↺ Restart level, ⚙ Custom puzzle (size 4–12, clue density)