Flowku (Puzzleship)

Flowku is a path-drawing puzzle. Each colour appears twice, and you join each pair with a line that moves between neighbouring cells. Lines may not cross or overlap, and when you finish every cell on the board must be part of some line.

Connecting dots is easy; filling the board is the puzzle. Dots in corners and on edges have only two or three ways out, which gives certain first steps, and paths that hug the edges tend to leave one clean region rather than two awkward ones. The usual mistake is a single cell cut off from every path, made a few moves before it shows.

Puzzleship publishes six grids of Flowku a day, graded from very easy to ultra hard. Each day's grids are numbered and dated, the same for every player, and come out at 13:00 UTC, although the page's countdown speaks of midnight in your own time; earlier days stay playable in the archive. The site is free with ads, and a premium plan removes them.