One unbroken loop
Loopy
Deduce which edges belong to a single closed loop.
THE OBJECTIVE
Think it through
Draw exactly one closed loop without branches. Each numbered cell must have exactly that many of its surrounding edges in the loop.
YOUR CONTROLS
Make your move
Click an edge to include it. Right-click to rule an edge out.
On a phone, use Touch: mark / reverse for a right-click action. Number puzzles include an on-screen number pad.
Choose an easier or harder grid in Type. Use Undo freely. Reveal solution shows the answer; it is a learning aid, not a hint. Use Finish & review to record practice time and actions. Complete 60 seconds of unrevealed practice with at least 3 board actions for the daily streak. Your last puzzle saves in this browser when device storage is available. Use Game → Download save file for a portable backup.
Puzzle engine by Simon Tatham and contributors · MIT licence · Full rules ↗