Trail · how to play
One line through every cell.
01
The rules
Draw a single continuous path that visits every cell exactly once and passes through the numbered checkpoints in order (1, 2, 3 …). The line can’t cross itself or move diagonally.
02
How to play here
Drag from cell to cell to draw the path — it follows your finger. Tap a cell already on the path to snap back to it and undo a wrong branch.
Interactive
Trace the path together
Step 1/3:Start at checkpoint 1 (top-left corner, cell 1). Tap it.
0 / 9 cells· next checkpoint: 1
Tap a neighbor of the path’s end to extend, or drag from the head to trace. Drag back to erase.
Next: Trail strategiesForced corners · Dead-end avoidance · Between-checkpoint counting — solve faster, never guess.