Play Light Line Online Free
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About Light Line
Light Line is a one-stroke filling puzzle: each stage is a shape made of blocks with one square lit, and you slide from that square through every other one without lifting your finger or crossing your own path.
It's the classic Hamiltonian-path problem in a friendly wrapper — every square exactly once, no doubling back — and the difficulty comes entirely from choosing the right starting direction.
How to play Light Line
- Fill
- Click and drag from the coloured square, without releasing
- Start on the coloured block.
- Slide through every empty square to fill it.
- Don't lift your finger or retrace your path.
- Fill the whole shape to complete the stage.
Light Line tips
- Work out the direction from the start square first; most failures are decided in the first move.
- Dead ends must be the last squares you reach — plan around them.
- Corners and single-width corridors force the route; find those first.
- If a square can only be entered one way, that entry has to be your last visit.
Light Line — questions
What's the rule in Light Line?
Fill every square in one unbroken stroke without lifting your finger or crossing your own path — so each square is visited exactly once.
How do you solve harder stages?
Identify the dead ends and single-width corridors first. Those force parts of the route, and the rest of the path has to be built around them.
Does it work on a phone?
Yes — it's designed for a single sliding touch. Nothing to install.
- Categories
- Casual & Hyper-Casual
- Platform
- Web browser — desktop, mobile, and Chromebook
- Cost
- Free, no download or sign-up