About Flow
Play Flow online for free — connect every pair of matching colored dots with a single pipe, without any pipes crossing, until the whole board is filled. A satisfying spatial-logic puzzle in the style of Flow Free.
How to play Flow
- Drag from one colored dot to its matching dot to draw a pipe between them.
- Pipes cannot cross each other or double back over themselves.
- Every cell on the board must be filled by exactly one pipe when the puzzle is solved.
- All color pairs must be connected at once for the puzzle to be complete.
Tips & strategy
- Solve corner and edge dots first — they have the fewest possible routes out.
- If a color's shortest path is the only way to avoid boxing in another pair, take it even if a longer route looks tempting.
- Leave the most flexible color pair for last — it can usually absorb whatever cells are left over.
- A single stray empty cell after you've connected every pair means one pipe took a shorter route than it should have — look for the pipe that could stretch to cover it.
Flow FAQ
Can pipes cross each other?
No — two pipes can never cross or overlap on the same cell.
Do I need to fill every cell, or just connect the dots?
Both — every pair must be connected, and every cell on the board must be covered for the puzzle to count as solved.
What happens if I box myself in?
You'll be left with cells no remaining pipe can reach — redraw the offending pipe using a different route rather than restarting the whole board.