About Fill Line: Cover Every Cell
Fill Line is a calm one-stroke logic puzzle. Start from the marked cell and draw one continuous line that fills every block on the board. You can't revisit a cell, and there are no diagonal moves — but the boards grow wonderfully tricky.
It sounds almost too simple, then quietly becomes a real planning challenge. No timer, no fail state, just you, a grid, and the satisfying moment the last cell fills.
How to play
- Start from the pulsing marked cell — it is already filled.
- Without lifting your finger or mouse, draw through neighbouring cells up, down, left or right.
- Fill every block on the board with that single line.
- Made a mistake? Drag back or restart the board.
Tips & tricks
- Plan the endpoint first — often the hardest cell to reach decides your whole route.
- Avoid trapping yourself in a corner with cells still outside your path.
- On bigger boards, section the grid mentally and connect the sections in one sweep.
Frequently asked questions
Can I cross my own line?
No — each cell can be visited only once, so the path must be a single clean sweep.
Is there a time limit?
No, Fill Line is an untimed puzzle you can ponder at your own pace.
Play tips
Stay safe out there — no games while driving or crossing the street.
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