Try One Stroke Free on iPhone
Infinite puzzles. Adaptive difficulty. No forced ads.
A plain square is drawable in one stroke, but diagonals and cross-lines can change that instantly.
Can it be drawn in one stroke? A plain square can. A square with extra center connections depends on the odd-vertex count.
Where should you start? Any corner for the plain square. For modified squares, start at one odd vertex and end at the other.
Common mistake: Forgetting that the center intersection becomes a new vertex when diagonals cross.
Infinite puzzles. Adaptive difficulty. No forced ads.