How to play One Line Puzzles (Paths)

One line through every cell

Paths is a one line puzzle: a single line visits every cell of the grid.

The rules

Draw one line from 1 to the last number, through the numbers in order, filling every cell.
The line moves to the next cell up, down, left or right, never diagonally.
Drag from 1 (or from the end of your line). Touch your line to cut it back.
Every puzzle has exactly one solution.

An easy 5×5 Paths from the game, solved: one line from 1 to 10, through every cell.

Corners first: a corner cell has only two neighbours, so unless it holds the first or the last number, the line passes through both.
A cell with only one free neighbour left is a dead end. Only the last number can sit there, so if it is not the end, change your route.
Keep the empty cells joined together: a pocket that gets cut off can never be filled.

For Android 7 or newer. Free, with ads, and no ad interrupts a puzzle.