Fill One Line

Fill One Line puzzles are mathematical problems with origins in the early 18th century.

A simple but addictive one line puzzle game that’s completely free to play.

--The rules are extremely simple.

Just fill in all of the blocks using only one line.

--Your brain becomes more active the more you play.

During your commute, before you sleep… enjoy downtime with brain training.

--Use hints for puzzles that are too hard to solve.

Hints are also free, of course.

--5 levels of difficulty.

A whopping 2,000 puzzles.

Don’t get too cozy—the puzzles get harder as you go along.

Whether math is your bane or your forte, be sure to give this game a try.

You’re sure to get hooked on these puzzles!