Question 1

Do paths have to fill the whole grid?

Accepted Answer

Yes. Connecting all the colours is only half of it — the puzzle is solved when every cell is part of a path.

Question 2

Can paths cross each other in Pathfinder?

Accepted Answer

No. Each cell belongs to exactly one path, so routes can never overlap or intersect.

Question 3

Is there always a solution?

Accepted Answer

Yes. Every Pathfinder puzzle has at least one valid solution that connects all pairs and fills the grid.