How LoopGlyph works (60 seconds)
A fast Slitherlink loop puzzle. Satisfy the numbers and draw one clean continuous loop.
1) What it is
LoopGlyph is a quick version of Slitherlink. You are drawing a single loop on the edges of a grid. Some cells contain numbers. Those numbers act like strict constraints and they are the whole point of the puzzle. Your loop must respect them, and it must be one continuous loop from start to finish.
It is simple to learn and surprisingly addictive. Small boards mean you can finish a round fast, then immediately replay and try to beat your time. The best runs feel calm and controlled, not frantic.
2) The rules
A number in a cell tells you exactly how many of that cell’s four surrounding edges must be lines. If a cell shows 3, it must have three line edges around it. If it shows 0, it must have none. Blank cells have no number, so they do not constrain anything directly.
Your final drawing must be one single loop. That means no branches and no separate mini loops. Every used corner has exactly two line edges touching it.
3) Controls
Tap an edge to cycle through states: empty, line, X, then back to empty. Lines are your loop. X means you are marking that edge as definitely not part of the loop.
Auto X and Conflict highlight can help you play faster. Auto X marks remaining edges as X once a numbered cell hits its quota. Conflict highlight warns you when a cell or corner becomes impossible.
Example round, step by step
The board changes every run, but the way you solve stays consistent. This is the clean approach that avoids messy rewrites.
Cells with 0 and cells with 3 usually give you immediate structure. A 0 means all four edges are X. A 3 means three edges are lines, so only one edge can be X. Mark these early because they constrain everything around them.
The loop cannot branch. At any corner, you can never end up with 3 lines touching it. Use X marks to prevent accidental branches before they happen.
Create short, safe line segments that satisfy numbers locally. Then connect those segments carefully. If you create a tiny closed loop too early, it usually breaks the one loop rule later.
Closing a loop feels satisfying but it is dangerous if any lines remain elsewhere. Keep an eye on whether you are accidentally forming a separate mini loop.
When most numbers look satisfied, do a final sweep. Check that every numbered cell has the correct count, then check that the loop is continuous and every used corner has exactly two line edges.
Tiny strategy that actually helps
Fast solvers do not only place lines. They also place X marks confidently. Every correct X reduces the search space and prevents branches.
If a corner already has two line edges, every other edge touching that corner must be X. This one rule prevents most mistakes.
A small closed loop before the puzzle is complete usually means you will end up with two loops. Keep at least one open connection until you are sure the rest will connect into it.
Auto X and Conflict highlight are designed for quick play. When they are on, you can move faster with fewer checks. When you want a pure solve, turn them off and take it slower.
Common questions
It is the exact count of line edges around that cell. The cell has four sides, and the number tells you how many of those sides must be lines.
X means that edge is not part of the loop. It is a note to yourself so you do not waste time retesting the same edge later.
No. The final answer must be one continuous loop. Separate mini loops are not allowed, even if the numbers look satisfied.
Auto X marks remaining edges as X when a numbered cell has already reached its quota. It speeds up play and reduces accidental overfilling.
It warns you when something becomes impossible, like a cell that can no longer reach its required number, or a corner that would force a branch.
Your score is your time. Best time and streak are saved locally on this device.
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Made by me 👋
LoopGlyph is a fast Slitherlink loop puzzle — tiny boards, premium UI, and streaks that keep you moving.
Contact: @numberglyph